DAT-SS 400 Series

Digital / Analog Transmitter

Installation & Operating

Manual
 Technical Specifications
Power Requirements

Input Voltage 24 Vdc + 15%

Power Consumption 7.5 Watts
Isolation Class II
Category Category II

Environmental

Operating Temperature + 14 to + 104ºF

122ºF (-10 to +40ºC)
+50ºC)
Storage Temperature - 4 to + 158ºF
122ºF (-20 to +70ºC)
+50ºC)
Relative Humidity 85% non-condensing

Display

Type 6-digit red LED, 7 segment 0.55” high

Status LED’s (4) Red LED’s
Keyboard (4) Keys (tactile feedback)

Performance

Excitation Voltage 5 volts fixed, short circuit proof

Load Current 85 mA (six 350 load cells)
Conversion Rate 50 updates / second (no filtering)
Resolution 60,000 counts
Sensitivity 0.02 uV / count
Linearity < 0.01% of full scale
Temperature Creep < 0.001% of FS / ºC
A/D Converter 24 bits
Signal Input Range - 0.5 mV/V to + 3.5 mV/V (- 3.9 mV/V to + 3.9 mV/V)
Filter 0.1 Hz to 25 Hz selectable
Increment Size x1, x2, x5, x10, x20, x50
Decimal Point 0.0, 0.00, 0.000
Calibration Methods Computer interface or via front panel

Analog Output (Isolated)

Type 16 bit D/A conversion

Voltage 0-10 Vdc (10K min load)
Current 4-20 mA (300 max load)
Linearity < 0.012% of full scale
Temperature Creep < 0.001% of FS / ºC

Inputs & Outputs

(2) Logic Inputs Opto-isolated, 24 Vdc PNP

(requires ext. power supply)
(2) Logic Outputs Solid-state relays, (maximum
load 24 Vdc / 100 mA each)

Serial Output RS-232, RS-422 or RS-485

Maximum Cable Length 50 feet RS-232, 3200 feet for RS-422

and RS-485
Standard Protocols ASCII, Modbus RTU
Baud Rate 2400, 9600, 19200, 38400, or 115200
selectable

Enclosure

Overall Dimensions 3.75” x 1.88” x 5.88” (L x H x D)

Mounting Panel mount (cutout = 3.50” x 1.69”)
Enclosure ABS Plastic
Protection (front) IP20
Weight 9.5 Ounces
Wiring Connections Terminal blocks (pitch = 0.196”) Specifications are subject to change without notice

2
 Installation

Mounting Environmental Considerations

Install the instrument in a location where it will Heavy electrical equipment should not be
not be subjected to excessive heat, humidity or installed close to the weighing equipment.
vibration. For best results, avoid direct sunlight
on the front of the instrument. The unit should Excessive vibration will affect the accuracy of
be installed at eye level so as to allow viewing the weigh system and depending on the severity
the display and access to the front panel keys. can cause damage to electrical and electronic
components.
Cable Types and sizes
The atmosphere should be dust free and not
Use a 6 x 0.5 mm2 shielded cable for the load contain any corrosive gasses or materials which
cell/s connection. Use a 3 x 0.34 mm2 shielded could adversely affect the equipment.
cable for the RS-232 connection, and a 2 x 0.34
mm2 shielded cable for the RS-485 connection. Hazardous areas

Power and Wiring Considerations If the weighing system will be installed in a

hazardous area, please refer to the drawing
The instrument is powered from an external 24 shown on page 40.
vdc source. The instrument can be operated
from a computer, therefore, a “clean” power NOTES:
source is required for reliable operation.
WELDING on or in the vicinity of the equipment
The incoming power should come from a source is strictly prohibited.
that is isolated from other process equipment.
STATIC loads, caused by thunderstorms, must
Cables carrying primary and switched power be prevented from developing by using reliable
should be routed away from load cell and other lightning conductors.
signal cables to avoid electrical interference.
ENSURE that the cooling of the equipment is
Relays, motor starters and other inductive not obstructed.
devices connected to the equipment must have
reliable and effective arc suppression.

Always connect the shield lead where indicated

on the drawing, and on one end only.

High voltage devices such as megohmmeters,

etc. should never be used to check the wiring
connections.

Plastic insulating tape should not be used on

load cell connections.

3
Introduction Front panel key functions - Setup Mode
This manual provides general information on In setup mode three of the front panel keys are
the installation, configuration, calibration, and used as directional keys to scroll through the
operation of the Precise™ 500 Series Digital / various menus. A label on the lower half of each
Analog Transmitter. The unit features a key identifies the direction provided by the key.
four-button keyboard, 6-digit Red LED display,
The “SET” and “FUN” keys are used to navigate
and four status LED’s. The unit can be
through the main menu and sub-menus. They
configured and calibrated with the front panel
are also used to increment or decrement the
keys, or remotely via the serial port. The
numerical value of a selected digit.
transmitter is packaged in a 1/8 DIN size
ABS plastic panel mounted enclosure. The “O” key is used to move through certain
sub-menu parameters, or to select a specific
All units include the following features:
digit when numerical values are displayed. It is
Drives up to six 350 ohm load cells also used to return to the main menu from any
Supports 4 and 6 wire connections of the sub-menus.
RS-232, RS-422, or RS-485 outputs The “PRG” key switches the unit to the “Basic
(2) Logic inputs Configuration” mode. It is also used to enter the
(2) Logic outputs (setpoints) sub-menus, and store parameter changes.
Isolated analog output 4/20mA, 0-5 Vdc
or 0-10Vdc output utilizing a 16 bit DAC The “PRG” key when used in conjunction with
the “SET” key switches the unit to the “Complete
The Precise™ 500 Series Digital / Analog Configuration” mode. It is also used to enter the
Transmitter has three modes of operation: sub-menus, and store parameter changes.
Operating mode Status LED’s
In this mode the unit displays gross weight, net
There are four status LED’s on the front of the
weight, or peak force readings as required.
unit, one for Motion, one for Net mode, and one
Setup mode for each of the outputs.
This mode is used for configuration and
calibration of the unit. Enabling/Disabling front panel keys.
Test mode In order to prevent any access to the instrument
The test mode enables you to test the inputs, by non-authorized personnel, a procedure to
outputs, and analog output. lock the keyboard is also available.

Front panel key functions - Operating Mode How to LOCK the front panel keys:
Press and hold the “PRG” and “O” keys.
The “SET” key enables you to enter values for The “O” key must be pressed after the “PRG”
Setpoints 1 and 2. Press the “SET” key, Set 1 key.
appears on the display. Press the “PRG” key to Release both keys when the message LOCK
view the current value. To change the current appears on the display.
value, press the “O” key to select a digit, then Press the “PRG” key to confirm.
use the “UP” or “DOWN” keys to increment or Now the keys are disabled.
decrement the value.
Repeat this procedure for the remaining digits, How to UNLOCK the front panel keys:
then press the “PRG” key to enter the new Press and hold the “PRG” and “O” keys.
value. To change the value for Setpoint 2, press The “O” key must be pressed after the “PRG”
the “SET” key again and repeat the above key.
procedure or press the “O” key to exit. Release both keys when the message UNLOCK
The “FUN” key is used to switch the unit from appears on the display.
Gross mode to Net mode, or Peak Hold mode. Press the “PRG” key to confirm.
To switch to Peak Hold mode, press and hold Now the keys are enabled.
the “FUN” key until a ‘P’ appears on the display.
The “O” key is used to zero the unit in Gross Note:
mode, tare the unit in Net mode, and reset the When the keyboard is locked the message
peak value in Peak Hold mode. LOCK appears for a while during the power-on
The “PRG” key is used to send the data to the sequence.
RS-232 serial port for use with a computer.

4
Main Power Connections Logic Input Connections (cont’d)
Use terminal 1 for the (+) input, and terminal 2 for Input (2) functions as a “send data” command,
the (-) input. The supply voltage must be closing the input causes the weight data to be sent
24 Vdc + 15%. The external power supply must to the RS-232 serial port.
have a minimum rating of 10 watts.
Logic Output Connections
Transducer/s Connections Use terminal 13 for Output (1) and terminal 14 for
Attach cable from transducer/s to transmitter Output (2). Terminal 15 is the common for both
(terminals 19 through 24). If using a 4-conductor outputs. The outputs utilize solid-state relays with
cable, (no remote sensing) jumpers must be a maximum load rating of 24 Vdc @ 100mA
installed between the + Excitation and + Sense
leads (terminals 20 to 21) and between Analog Output Connections
the - Excitation and - Sense leads (terminals 19 to Use terminal 3 for the 4/20mA output (300 Ohm load
22) as shown below in Figure 1. max), or terminal 4 for a 0 to 5 Vdc or 0 to 10 Vdc
output (10K Ohm load max). Terminal 5 is used as
Logic Input Connections the common for either output.
Use terminal 16 for Input (1), and terminal 17 for
Input (2). Terminal 18 is the common for both Serial Output Connections
inputs. These are powered inputs, which require The transmitters serial port supports RS-232,
an input voltage of 24 Vdc to activate them. See RS-422 or RS-485 communications.
Figure 1 for additional information. Serial parameter selections can be found on page
Input (1) is used to zero the unit in Gross mode, tare 18. A detailed description of the serial data formats
the unit in Net mode, and reset the peak value when is provided on pages 20 through 23.
operating in Peak Hold mode. Wiring connections are shown on pages 24 through
25.

Figure 1
Common

Output 2

Output 1

Set Points

POWER SUPPLY
24 Vdc
13 14 15 16 17 18 19 20 21 22 23 24

1
2
Ext. power supply
for Logic Inputs

Current Out
3
(24 Vdc)

Analog
Output

Input 1 Voltage Out

4

Input 2 Common
5

Common Txd
6

(20m max.)
RS232

- Exc Rxd
7

+ Exc Gnd
8

+ Sense + Tx
9 10 11 12

(1000m max.)
32 unit max.
RS422/485

- Sense - Tx

- Sig + Rx

+ Sig - Rx
LOAD
CELL

5
When no programming procedures are in progress, the display shows the weight value.
In some particular conditions the following ERROR MESSAGES are displayed:

The weight displayed by the instrument is more than 9 divisions over the
“Live” weight value (see “NET” parameter, page 12)

The load cells input signal is lower than - 0,5 (-3,9) mV/V.
O-L The load cells input signal is higher than +3,5 (+3,9) mV/V.
The load cell input signal is missing
The values in brackets refer to the instruments having load cells input signal range from - 3,9 to + 3,9 mV/V (optional)

Configuration Methods Basic Configuration (cont’d)

The Precise™ 500 Series Digital / Analog To set one of the following parameters, CAPAC,
Transmitters can be configured by using the SENSIT, NET, DEAD L, DSPDIV, or ANALOG,
front panel keys to navigate through a series of press the “PRG” key to view the default or
menus, or by sending configuration and previously selected value for that parameter.
calibration data to the RS-232 port with To change the value, press the “O” key to select
INOVATION an MS Windows based program a digit, then use the “UP” or “DOWN” keys to
included with the unit. INOVATION simplifies increment or decrement the value of the
the configuration and calibration procedure. selected digit. When the desired value appears
on the display, press the “PRG” key to store the
Configuration Procedures new value. Press either the “UP” or “DOWN”
keys to move to the next parameter.
There are two procedures available for setup of
the Precise™ 500 Series Transmitters, “Basic The SIGNAL parameter enables you to view the
Configuration” or “Complete Configuration”. actual input signal from the transducer/s. Press
the “O” key to move to the next parameter.
The “Basic Configuration” procedure allows you
to change selective parameters, whereas, the The CALIBR parameter is used to calibrate the
“Complete Configuration” procedure allows you transmitter. The unit can be calibrated using
to change all of the parameters. either the data sheet or dead load procedure.
For example, if the transmitter requires The data sheet calibration procedure allows the
calibration only, the “Basic Configuration” transmitter to be calibrated without a transducer
procedure is recommended. simulator or test weights. This procedure is
based on the capacity and certified, full scale
The following pages provide a detailed mV/V output (sensitivity) of the transducer/s.
explanation of both configuration procedures.
To perform a data sheet calibration, enter the
Basic Configuration via the Front Panel total scale capacity, sensitivity, net weight, dead
load weight, and display resolution, then press
To perform a “Basic Configuration”, press and the “O” key. The display will indicate STORE ?,
hold the “PRG” key until the display shows press the “PRG” key to save the changes and
CAPAC. Use either the “UP” or “DOWN” keys to return to the operating mode.
navigate through the eight basic configuration
sub-menus shown below. See page 8 for a detailed explanation of the
calibration procedure using test weights.
The ANALOG parameter is used to enter the
Display Sub-menu Functions
full scale weight value that you want the analog
output to represent. The default is net weight
CAPAC Total capacity of transducer/s
value.
SENSIT Rated output of the transducer/s To exit from the setup procedure, press the “O”
key when any one of the following parameters
NET Net (live) weight value are displayed CAPAC, SENSIT, … ANALOG.
The display will indicate STORE ?, press the
DEAD L Dead load weight value “PRG” key to save the changes and return to
the operating mode.
DSPDIV Increment size (resolution)

SIGNAL Transducer/s input signal (view)

CALIBR Calibration procedure

ANALOG Full scale value for analog output

6
Basic Configuration Menu

( PRG ) (keep pressed)

Enter total
( O CAPAC ( PRG ) scale ( PRG )
capacity

Enter
( O SENSIT ( PRG ) transducer/s ( PRG )
sensitivity

Enter
( O NET ( PRG ) “LIVE” ( PRG )
weight value

Enter
( O DEAD L ( PRG ) “Dead Load” ( PRG )
weight value

Select display
( O DSPDIV ( PRG ) divisions ( PRG )
0.001 - 50

View input
( O SIGNAL ( PRG ) signal value ( O
mV/V

See calib.
( ( PRG ) procedure on (
O CALIBR
next page
*
Enter FS
( O ANALOG ( PRG ) value for ( PRG )
analog out

STORE ? ( PRG ) QUIT

Place the unit in “Basic Configuration” mode by then use the “UP” or “DOWN” keys to increment
pressing and holding the “PRG” key until the or decrement the value of the selected digit.
display shows CAPAC. Use either the “UP” or Press the “PRG” key to enter the new value,
“DOWN” keys to scroll through the eight basic then press either the “UP” or “DOWN” keys to
configuration menus shown above. To set one move to the next parameter. To exit the setup
of the following parameters, CAPAC, SENSIT, procedure, press the “O” key when any one of
NET, DEAD L, DSPDIV, or ANALOG, press the the sub-menu parameters are displayed. The
“PRG” key to view the default or previously display will indicate STORE ?, press the “PRG”
selected value for that parameter. To change key to save the changes and return to the
the value, press the “O” key to select a digit, operating mode.

7
Basic Configuration Menu (cont’d)

NOTE: In order to ensure greater stability during the calibration procedure, the digital filter increases
to the maximum value automatically (value 9), therefore the weight indication updates very slowly at
this stage. Once the calibration procedure has been completed, the digital filter will return to the pre-
vious value automatically.

Cont’d from
(
* the previous
page

Sets ZERO
( PRG ) CAL ( O
calibration

Enter the
WT-VALUE actual weight ( PRG )
value (SPAN)

CAL
NOTE:
Input signal from the transducer/s
( PRG ) must be stable when entering the
Back to zero and span values.
“CALIBR”
(Main menu)

The Precise 500 Series Transmitters can be 4. Enter the actual weight value using the “O” key
calibrated via the front panel keys, or with the to select each digit, then use the “UP” or
INOVATION configuration utility. “DOWN” keys to increment or decrement the
value of the selected digit.
Both methods consist of the following steps. 5. Press the “PRG” key to enter the setting (CAL
will be blinking on the display).
Zero calibration
Apply a known load (test weight) 6. Press the “PRG” key, (the display indicates
Edit weight value CALIBR), press either the “UP” or “DOWN”
Span calibration keys to move to the next parameter.
Optional linearization (See page 14) 7. If no additional parameter changes are
required, press the “O” key (the display
2-point calibration via the front panel keys indicates STORE ?), press the “PRG” key to
save the changes and return to the operating
To calibrate the transmitter with the front panel mode.
keys, proceed as follows:
Should it be necessary to erase either of the
1. With the unit in “Basic Configuration” mode, previous calibration entries, proceed as follows:
press the “PRG” key (CAL will be blinking on
the display). When the message CAL is blinking on the display,
to erase the zero calibration, press and hold the
2. With the system unloaded, press the “O” key. “FUN” key, and then press the “O” key. Release
both keys, the previous zero calibration entry has
3. Apply a known load not less than 10% of the been erased. To erase the span calibration, press
net weight value and press the “UP” key. and hold the “FUN” key, and then press the “SET”
key. Release both keys, the previous span
calibration entry has been erased. End the
procedure as described above (points 6 and 7).

8
Complete Configuration via the Front Panel Configuration using INOVATION

In order to perform a complete configuration, the To configure the transmitter with the
unit must be placed in setup mode. To enter the INOVATION program, proceed as follows:
setup mode, press and hold the “PRG” and SET”
keys on the front of the unit. The “SET” key 1. Install INOVATION on an IBM-compatible
must be pressed after the “PRG” key. Release computer running Windows 95, 98, Me or XP.
both keys when the word CONFIG is shown on
the display. The CONFIG menu is the first of six 2. Minimum system requirements are 8MB of
main menus used to completely configure the extended memory and at least 5MB of
instrument. Use either the “UP” or “DOWN” available hard drive space.
keys to navigate through the six main menus
shown below. 3. Remove power from both units, and connect
the PC’s serial port to the RS-232 terminals
on the transmitter. Refer to page 25 for wiring.

Display Main Menu Functions 4. Apply power to the PC and the transmitter,
then start the INOVATION program.
CONFIG Parameters for total scale capacity,
transducer sensitivity, net, dead load 5. Switch the transmitter into remote mode by
weight values, and display divisions. going into complete configuration and then
selecting ‘Remote’ from the serial menu.
CALIBR Zero and full scale calibration. Refer to the serial menu on page 18.

PARAM Parameters for digital filtering,

Complete configuration Menu (cont’d)
motion, auto zero and zero tracking

IN-OUT Operating mode selection for SERIAL ANALOG IN-OUT

outputs, and input and output test.

SERIAL Serial output configuration.

ANALOG Analog output configuration and cali- BAUD R

bration.

Press the “PRG” key to move down to the

sub-menu or parameter desired. Press the REM-CO REMOTE
“PRG” key to view the default or previously
selected value for that parameter.
When viewing the transmitter from a computer,
To change a parameter, press either the “UP” or the current weight value will be displayed under
“DOWN” keys to view the choices for that the icon representing the unit being configured.
parameter. When the desired selection appears
on the display, press the “PRG” key to enter the If ERROR appears under the transmitters icon,
selection and move to the next parameter. re-check all of the wiring connections, verify that
the unit is in remote mode, and make sure the
To edit numerical values, use the “O” key to icon being displayed matches the address of the
select the digit, then use either the “UP” or transmitter to be configured.
“DOWN” keys to increment or decrement the
value of the selected digit. Once the value has Double-clicking on the transmitters icon will bring
been entered, press the “PRG” key to store the you to the INOVATION Main Setup Screen.
value and move to the next parameters.
Press the “0” key until the display indicates
STORE ?, press the “PRG” key to save the
changes and return to the operating mode.

9
Configuration using INOVATION (cont’d) If the operator answers “Yes”, the “Dead load”
value inside the first file folder will change
On this screen you can switch the display automatically according to the new zero.
among net, gross and peak reading, set the se- If the operator answers “No”, the “Dead load”
rial address, enter values for the two setpoints, value inside the first file folder will remain set to
check the two logic inputs status and the the previous value.
software release of the instrument. The third file folder contains the parameter
Click on the SETUP button, seven file folders will selections for digital filtering, zero tracking, etc.
appear on the lower half of the screen. The first The fourth file folder contains the parameter
file folder labeled “Parameters” will be open. selections for configuring the inputs and outputs
The top section in this folder is for entering the The fifth file folder contains the parameter
total scale capacity, sensitivity, net weight, and selections for the serial output.
dead load weight values (required parameters
for performing a data sheet calibration) The sixth folder contains the parameter
selections for the analog output,
The data sheet calibration procedure allows the
transmitter to be calibrated without a transducer The seventh folder provides a means for testing
simulator or test weights. This procedure is the outputs and analog output
based on the capacity and certified, full scale The Main Setup Screen and file folders 1
mV/V output (sensitivity) of the transducer/s. through 6 all have SEND buttons on them for
To perform a data sheet calibration, enter the downloading the various parameter changes.
above values, then click on the SEND button for When configuration and calibration has been
that group of parameters. completed, the data can be saved on a PC or
The next section in this file folder is used to floppy disk or downloaded (sent) to the
select the display resolution. It consists of a transmitter. This method of configuring and
drop down menu and a SEND button. calibrating is very beneficial when several
transmitters with similar configurations are being
The Precise units allow to count by 1’s up to set up, or when a transmitter has to be replaced.
60,000 counts, Yet, for values greater than
10,000, the units automatically select a lower To exit INOVATION , click on the Exit Setup
resolution to ensure greater stability. After se- icon. Now click on Option in the upper left corner
lecting the desired resolution, press the SEND of the screen, from the drop down menu select
button for this parameter. Do not press any of EXIT, a “Save Changes” window will appear,
the other SEND buttons in this folder or the unit click on OK. This will return you to the
will revert back to a default setting of x2, x5, etc. Configuration Utility Screen, click on QUIT.
Changes to the display resolution should
only be done after the unit has already been Figure 2 shows an example of one of the
calibrated using the data sheet or dead load INOVATION configuration screens.
procedure.
The bottom parameter selection in this file folder
is labeled “Operating Mode”. It enables the unit Figure 2
to retain the mode of operation in the event of a
power loss. When the power is re-applied, the
transmitter automatically returns to the mode
that it was operating in prior to the power loss.
Changes to the Operating Mode cause an
automatic power off - power on sequence of the
instrument when the configuration will be saved.
This allows the new Operating Mode to take
effect.
The second file folder enables you to calibrate
the unit with a transducer simulator or actual
weight, (recommended method of calibration).
Inside this 2nd file folder, once the zero
calibration has been performed, the program
asks the operator if the new zero has to modify
the “Data sheet” calibration.

10
 Figure 2.1

PRINT CONFIGURATION
The Inovation software also allows the
Date 12/01/2004 Test Procedure for DAT instruments
operator to create new configurations,
Status Instrument
save new files and open existing files wi- Device address 2
thout having any instrument connec- Setpoint 1 value 1500
ted to the computer. Setpoint 2 value 3500
Input 1 status 0
Input 2 status 0
Thanks to this feature, the download of Instrument software version 0.4
a given configuration to the instrument Parameters
can be performed at any time. Total capacity of transducers 10000
Full scale output value (mV/V) 2.0000
To perform the operation mentioned Net weight (value) 8000
Dead load (value) 1500
above click on the “Edit” menu at the left Display resolution 1
end upper corner (See figure 2.1), then Input signal 0.599
enable the function “Edit Configuration Internal counts (Reference only) 155729
Operating mode Net
Offline”.
Filters / z-track
The message “Edit” will appear on the Digital filter value (0 to 9: 0 = no filter; 9 = max filter; default 5) 5
display, showing this particular condition. Motion band value (0 to 4: 0 = minimum; 4 = maximum; default 2) 1
Auto zero range setting at power up (0 to 10.0% of net weight: 0 = disble) 0.0
Another useful function concern the Zero tracking (0 to 4: default 2) 2
possibility to print out a report in which Output config. Out 1
Operating mode Net
all the parameters of a given Contact status below setpoint value N. Open
configuration are included. Positive / Negative weight comparison Positive
Immediate activation / activation after stabilization Immediate
The “Print” command can be performed Hysteresis (default 2) 2
by clicking on “Print Configuration”. Setpoint activation time length (in 1/10 sec.) (0 = disable) 0
Time delay for activating setpoint (in 1/10 sec.) (0 = disable) 0
Besides, the command “Report Notes” Output config. Out 2
allows the operator to include a heading Operating mode Gross
Contact status below setpoint value N. Closed
in the report, in order to identify the plant, Positive / Negative weight comparison Positive
the customer name or any other Immediate activation / activation after stabilization Immediate
useful information. Hysteresis (default 2) 50
Setpoint activation time length (in 1/10 sec.) (0 = disable) 0
Time delay for activating setpoint (in 1/10 sec.) (0 = disable) 0
An example of a printed report is given
Serial
on the right side of this page: Baud Rate (default 9600) 9600
Serial port mode (default Continuous transmission) Slave
Serial address (ID Code) (from 01 to 32) 2
Response delay (Demand or Modbus mode) (in 1/100 sec. Max 1 sec.) 25
Data Format (N-8-2 / E-8-1 / O-8-1 for MODBUS mode) N-8-1
Com2 Protocol (None for MODBUS mode) None
Com2 Address (Profibus/DeviceNet Address from 1 to 126) 001
Com2 Baud Rate (Only DeviceNet) 250
Ana. Output
Full scale value (default = Net weight value) 8000
Analog output source (Net Gross Peak H) Net
Analog output selection 0-20mA
No load zero input value 0

11
Complete Configuration Menu

CONFIG CALIBR PARAM IN-OUT SERIAL ANALOG

( PRG )

Enter total
( O CAPAC ( PRG ) scale ( PRG )
capacity

Enter
( O SENSIT ( PRG ) transducer/s ( PRG )
sensitivity

Enter
( O NET ( PRG ) “LIVE” ( PRG )
weight value

Enter
( ( PRG ) “Dead Load” ( PRG )
O DEAD L
weight value

Select display
( O DSPDIV ( PRG ) divisions ( PRG )
0.001 - 50

View input
( O SIGNAL ( PRG ) signal value ( O
mV/V

View the
( O COUNTS ( PRG ) Raw ( O
A/D counts

( O OPMODE
Operating
( PRG ) GROSS NET PEAK H mode @
power up

( PRG )

Place the unit in complete configuration To change the value, press the “O” key to select
mode by pressing and holding the “PRG” a digit, then use the “UP” or “DOWN” keys to
and SET” keys on the front of the unit. The increment or decrement the value of the
“SET” key must be pressed after the “PRG” selected digit. Press the “PRG” key to enter
key. Release both keys when CONFIG is dis- the new value, then press either the “UP” or
played. “DOWN” keys to move to the next sub-menu
parameter or press the “O” key to return to the
Press the “PRG” key to enter the sub-menu, main menu.
then use either the “UP” or “DOWN” keys to se- To exit the configuration procedure, return to the
lect one of the sub-menu parameters. Press the main menu and press the “O” key, (the display
“PRG” key to view the default or previously se- will indicate STORE ?), press the “PRG” key to
lected value for that parameter. save the changes and return to the operating
mode.

12
Complete Configuration Menu (cont’d)

NOTE: In order to ensure greater stability during the calibration procedure, the digital filter increases
to the maximum value automatically (value 9), therefore the weight indication updates very slowly at
this stage. Once the calibration procedure has been completed, the digital filter will return to the pre-
vious value automatically.

CALIBR PARAM IN-OUT SERIAL ANALOG CONFIG

( PRG )

Sets ZERO
( PRG ) CAL ( O
calibration

Enter the
WT-VALUE actual weight ( PRG )
value (SPAN)

( PRG ) CAL
NOTE:
Input signal from the transducer/s
must be stable when entering the
zero and span values.

NOTE: Prior to calibration, the transmitter must 5. Enter the actual weight value using the “O” key
be configured, thus giving it a set of operating to select each digit, then use the “UP” or
parameters. “DOWN” keys to increment or decrement the
value of the digit. Press the “PRG” key to enter
The unit can be calibrated using the 2-point the setting (CAL will be blinking on the display).
method or the optional multi-point (linearity
compensation) method. See page 14 for a 6. Press the “PRG” key, (the display indicates
detailed description of the multi-point calibration CALIBR), press either the “UP” or “DOWN
procedure. keys to move to the next parameter.

2-Point calibration via the front panel keys 7. If no additional parameter changes are
required, press the “O” key (the display
To calibrate the transmitter using the front panel indicates STORE ?), press the “PRG” key to
keys, proceed as follows: save the changes and return to the operating
mode.
1. With the unit in “Complete Configuration”
mode, press either the “UP” or “DOWN” Should it be necessary to erase either of the
keys until CALIBR is shown on the display. previous calibration entries, proceed as follows:

2. Press the “PRG” key (CAL will be blinking on To erase the zero calibration, press and hold the
the display). “FUN” key, and then press the “O” key.
Release both keys, the previous zero calibration
3. With the system unloaded, press the “O” key. entry has been erased. To erase the span
calibration, press and hold the “FUN” key, and
4. Apply a known weight not less than 10% of then press the “SET” key. Release both keys, the
the net weight value and press the “UP” key. previous span calibration entry has been erased.

13
Basic Configuration Menu (cont’d)

CALIBR NOTE: Input signal from the

transducer/s must be stable
( PRG ) when entering the linearization
correction point values.
Sets tare
CAL value
Point 0

( SET ) (Keep pressed)

Apply a known
Lin P1 weight on the
scale

( PRG )

Display and
WT VALUE edit test ( PRG )
weight value

Lin P9 ( PRG ) ( PRG )

Lin P2….P8 CAL

( O

The Precise™ 500 Series Digital / Analog 5. Press the “PRG” key. The unit will increment
Transmitters feature a 10-point linearization to the next linearization point (Lin P2).
option (available only with the front panel keys).
Any number of points up to 10 may be used, 6. Repeat steps 3 through 5 for additional points.
however, the last point must always be the full 7. If all 10 points will be linearized, follow the 1st.
scale value of the weighing system. procedure. For linearization correction using
Example: A one point linearization correction less than 10 points, follow the 2nd. procedure.
would require a total of two points, one point 1st Procedure (10-point linearization)
within the range, and one point for full scale.
7a. Enter the weight value for linearization point
Prior to performing the linearization correction, Lin P9, and press the “PRG” key (CAL will be
at least the zero of the unit must have already blinking on the display). Press the “PRG” key
been calibrated, while the full scale value is not again, (the display indicates CALIBR).
mandatory. The unit must be in CALIBR mode,
and you should have known weights available 7b. Press the “O” key (the display will indicate
equal to the points being set. STORE ?), press the “PRG” to save the
changes and return to the operating mode.
Multi-point Calibration via Front Panel Keys
2nd. Procedure (less than 10-point linearization)
1. With the unit in either “Basic or Complete
Configuration” mode, press the “PRG” key 7a. The last linearization point must be the full
(CAL will be blinking on the display). scale value. Press the “O” key, (CAL will be
blinking on the display).
2. Press and hold the “SET” key until Lin P1 is
blinking on the display. 7b. Press the “PRG” key (the display will show
CALIBR). Press the “O” key (the display will
3. Apply a known weight for the first linearization indicate STORE ?).
point, and press the “PRG” key.
7c. Press the “PRG” key to save the changes
4. Enter the actual weight value using the “O” and return to the operating mode.
key to select each digit, then use the “UP”
and “DOWN” keys to increment or decrement
the value of the selected digit.

14
Complete Configuration Menu (cont’d)

PARAM IN-OUT SERIAL CONFIG CALIBR

( PRG )

Enter value
( O FILTER ( PRG ) 0 to 9 ( PRG )
Default = 5

Enter value
( O MOTION ( PRG ) 0 to 4 ( PRG )
Default = 2

Enter value
( O AUTO 0 ( PRG ) 0.0 to 10.0% ( PRG )
0 = Disabled

Enter value
( O 0 TRAC ( PRG ) 0 to 4 ( PRG )
Default = 2

Enter value
( O 0 BAND ( PRG ) 0 to 200 ( PRG )
Default = 100

1. With the unit in “Complete Configuration” 5. Press the “PRG” key to enter the new value,
mode, press either the “UP” or “DOWN” then press either the “UP” or “DOWN” keys to
keys until PARAM is shown on the display. move to the next sub-menu parameter or
press the “O” key to return to the main menu.
2. Press the “PRG” key to enter the sub-menu,
then use either the “UP” or “DOWN” keys to 6. To exit the configuration procedure, return to
select one of the sub-menu parameters. the main menu and press the “O” key, (the
display indicates STORE ?), press the “PRG”
3. Press the “PRG” key to view the default or key to save the changes and return to the
previously selected value for that parameter. operating mode.

4. To change the value, press the “O” key to

select a digit, then use the “UP” or “DOWN”
keys to increment or decrement the value of
the selected digit.

See Table 2 on page 26 for a detailed explanation of the “PARAM” parameter selections

15
 Complete Configuration Menu (cont’d)

IN-OUT SERIAL ANALOG CONFIG CALIBR PARAM

( PRG )

( O MODE 1 ( PRG )

( PRG ) NET
( PRG ) GROSS

on page 28
( PRG ) PEAK H
( O HYST 1 ( PRG ) ( PRG )
Default = 2

( PRG ) N.O.
Enter value
( O TIMER 1 ( PRG ) 0.00 - 100.0 ( PRG ) ( PRG ) N.C.
Default = 0

Default = 0 ( PRG ) NEG.

( O MODE 2 ( PRG ) procedure for NORMAL

STABLE

See notes
( O HYST 2 ( PRG ) on page 28 ( PRG )
Default = 2

Enter value
( O TIMER 2 ( PRG ) 0.00 - 100.0 ( PRG )
Default = 0

Enter value
( O DELAY 2 ( PRG ) 0.00 - 100.0 ( PRG )
Default = 0

Continued on the following page

16
 Complete Configuration Menu (cont’d)

Cont,d from the previous page

Closing Input 1 = 10
Closing Input 2 = 02

( O TEST IN ( PRG ) IN 0 0 ( O

( O TEST OUT ( PRG )

( O OUT 00
( O OUT 10 See
( O OUT 02 Table 1
( O OUT 12

Table 1

Display OUTPUT 1 OUTPUT 2

(status) (status)
OUT 00 OFF OFF

OUT 10 ON OFF

OUT 02 OFF ON

OUT 12 ON ON

See Table 6 on page 28 for a detailed explanation of the “IN - OUT” parameter selections

17
 SERIAL ANALOG CONFIG CALIBR PARAM IN-OUT
( PRG )

( O BAUD R ( PRG )
( PRG ) 2400
( PRG ) 9600
( O PROT-1 ( PRG ) ( PRG ) 19200
( PRG ) CONTIN ( PRG ) 38400
( PRG ) DEMAND ( PRG ) 115200
( PRG ) AUTOM
( PRG ) SLAVE
MODBUS ( PRG )

( PRG ) BCD
( PRG ) NONE
( PRG ) E 8 1

( PRG ) o 8 1

( O PROT-2 ( PRG )

( PRG ) PROFIB Use the “PROT-2” ONLY when the

( PRG ) DEVNET Profibus-DP or DeviceNet option cards.

( PRG ) NONE

( O ADDRES ( PRG ) 01 - 32 ( PRG ) *“BAUD1R”, “BAUD2R” and “DN-ADD”

Max # 32
come up on the display only if the
“PROT-2” menu has been set as
“DEVNET”.
*
DN-ADD

( PR-ADD ( PRG ) ( PRG )

O 001 - 126
**
When the “PROT-2” menu is set as
“PROFIB” or “DEVNET”, the “ANALOG”
menu will be automatically disabled.
Therefore the access to the “ANALOG”
Enter value menu is possible only when the
( O DELAY ( PRG ) 0.00 - 1.00 ( PRG ) “PROT-2” has been set as “NONE”.
Max 1 sec.

( O REM-CO ( PRG ) REMOTE ( O MODE

( O DATA F ( PRG )
( PRG ) n 8 2
( PRG ) E 8 1
( PRG ) o 8 1
( PRG ) n 7 2
( PRG ) E 7 1
( PRG ) E 7 2
See Tables 3 through 5 for ( PRG ) o 7 1
a detailed explanation of the
“SERIAL” parameter selections
18
 Complete Configuration Menu (cont’d)

ANALOG CONFIG CALIBR PARAM IN-OUT SERIAL

( PRG )

( O F-SCAL ( PRG ) value ( PRG )

( O MODE ( PRG )

( PRG ) NET

( O ANZERO ( PRG ) value ( PRG )

( PRG ) PEAK H

( O TEST ( PRG )

( O OUT 0

( O RANGE ( PRG )
( O OUT 100

( PRG ) 0-20 mA
( PRG ) 4-20 mA
( PRG ) 0-10 V
( PRG ) 0-5 V

( O OFFSET ( PRG )

( PRG ) -0- Adjust value

with UP & ( O
( PRG ) - FS - DOWN keys

1. With the unit in “Complete Configuration” 5. To edit numerical values, use the “O” key to
mode, press either the “UP” or “DOWN” select the digit, then use either the “UP” or
keys until ANALOG is shown on the display. “DOWN” keys to increment or decrement the
value of the selected digit.
2. Press the “PRG” key to enter the sub-menu,
then use either the “UP” or “DOWN” keys to 6. Press the “PRG” key to enter the new value,
select one of the sub-menu parameters. then press either the “UP” or “DOWN” keys to
move to the next sub-menu parameter or
3. Press the “PRG” key to view the default or
press the “O” key to return to the main menu.
previously selected value for that parameter.
The “ANZERO” parameter is a negative weight
4. To change a parameter, press either the “UP”
value to which the zero offset of the analog out-
or “DOWN” keys to view the choices for that
put can be referred.
parameter.
When the desired selection appears on the Example: If the selected range is 4/20 mA and
display, press the “PRG” key to enter the the “ANZERO” value is “10”, the analog output
selection and move to the next parameter. value will be 4 mA when the weight will be “–10”

19
Serial Communication

Baud Rates
2400, 9600, 19200, 38400, and 115200

Data Formats
All serial characters are in ASCII format, and consist of the following.

1 Start Bit, 7 or 8 Data Bits, 1 or 2 Stop Bit, Parity No, Even or Odd.
The above data depend on the selection made in the “SERIAL” menu (see Table 3 on page 26)

Transmission of the serial data can be initiated in several ways as described below.

Automatic mode
The “Automatic” mode is used to interface with printers or other data acquisition devices. The serial
data is transmitted automatically, upon stabilization whenever the weight value has increased or
decreased more than 20 divisions.
This function is not performable when the “MOTION” parameter is set to 0 (weight stability check
disabled).

Continuous mode
The “Continuous” mode is used to interface with computers, remote displays, or other types of
devices that require constant data updating.

Demand mode
The “Demand” mode is used to interface with printers and requires a manual print command from the
front panel keys (Model 400) or a remote contact closure to initiate the output.
In the above modes, the transmitter sends serial data using the format shown below:

STX <status> <net weight> <gross weight> <peak value> ETX <chksum> EOT

STX (start of text) = 02h ETX (end of text) = 03h EOT (end of transmission) = 04h

<status> = 1 ASCII character consisting of the following:

“S” = Stable
“M” = Motion
“O” = Overload
“E” = Error
<net weight> = 6 ASCII characters
<gross weight > = 6 ASCII characters
<peak value> = 6 ASCII characters
<checksum> = 2 ASCII characters (STX & ETX are not included in the checksum)

NOTE: The brackets “<“ “>“ are not sent, they are only shown for clarification.

The checksum control value is obtained by performing the XOR operation.

It is expressed with 2 Hexadecimal digits. Example: 25 = 1D

The result of the above calculation equals 1 character, which can be a numerical value of 0 to 9 or
A to F (Hexadecimal)

20
Serial Communication (cont’d)

Slave mode
The slave mode is used for interfacing with distributed control systems (DCS) or programmable logic
controllers (PLC). This mode requires a data request from the master to initiate the output.
In this mode the host sends serial data to the transmitter using the formats shown below:
<addr> “N” EOT

After receiving the request, the transmitter responds with the following data string.

<addr> “N” <status> <net weight> <gross weight> <peak value> ETX <chksum> EOT

In case of an error, the transmitter will respond with the following data string.

<addr> NAK EOT

<addr> serial address + 80h Example: address 1 would be 1 + 80h = 81h

ETX (end of text) = 03h EOT (end of transmission) = 04h

Character strings

<status> = 1 ASCII character consisting of the following:

“S” = Stable
“M” = Motion
“O” = Overload
“E” = Error
<net weight> = 6 ASCII characters
<gross weight > = 6 ASCII characters
<peak value> = 6 ASCII characters
<checksum> = 2 ASCII characters (<Addr> & ETX are not included in the checksum)

NOTE: The brackets “<“ ”>“ are not sent, they are only shown for clarification.
The checksum control value is obtained by performing the XOR operation.
It is expressed with 2 Hexadecimal digits. Example: 25 = 1D
The result of the above calculation equals 1 character, which can be a numerical value of 0 to 9 or
A to F (Hexadecimal)

Programming the set-points

Command from the host

<addr> “S” <s1> <s2> ETX <chksum> EOT

<s1> = 6 ASCII characters for set-point 1

<s2> = 6 ASCII characters for set-point 2

The transmitter responds with the following data string:

<addr> ACK EOT

In case of an error, the transmitter will respond with the following data string.

<addr> NAK EOT

The programmed values are stored in RAM, however, they are not retained if the power is removed.
There is no limit on the number of times that these commands can be performed.

21
Store set-point values in Eeprom

Command from the host

<addr> “M” EOT

The transmitter responds with the following data string:

<addr> “M” EOT

In case of an error, the transmitter will respond with the following data string.

<addr> NAK EOT

This command is used to store the programmed set-point values in Eeprom.

This command can be performed up to 100,000 times.

Request set-point values

Command from the host

<addr> “R” EOT

The transmitter responds with the following data string:

<addr> “R” <s1> <s2> ETX <chksum> EOT

In case of an error, the transmitter will respond with the following data string.

<addr> NAK EOT

“Net mode” / ”Gross mode” switch command

This command performs the same function of the “FUN” key.

Switch to Gross weight mode

Command from the host

<addr> “C” “L” EOT

The transmitter responds with the following data string:

<addr> “C” “L” ACK EOT

In case of an error, the transmitter will respond with the following data string.

<addr> NAK EOT

22
 Switch to Net weight mode

Command from the host

<addr> “C” “N” EOT

The transmitter responds with the following data string:

<addr> “C” “N” ACK EOT

In case of an error, the transmitter will respond with the following data string.

<addr> NAK EOT

Zero / Tare / Peak reset command

This command performs the same function of the “0” key and/or logic input (1).
It’s used to zero the unit when in Gross mode, tare the unit when in Net mode, and reset the value
to zero when operating in Peak Hold mode.

Command from the host

<addr> “A” “A” EOT

The transmitter responds with the following data string:

<addr> “A” “A” ACK EOT

In case of an error, the transmitter will respond with the following data string.

<addr> NAK EOT

Modbus mode

The Modbus mode is used to communicate with Modicon Programmable Controllers using a unique
message structure that the controllers can understand regardless of the type of networks being used.

Please refer to the tables on pages 29 through 39 for information regarding the “MODBUS” RTU
Protocol Specifications.

Modbus® and Modicon® are registered trademarks of the Schneider Automation Group.

23
 Serial Output Wiring Connections

RS-232 serial connections to a computer, remote serial display or other data acquisition device.
See Figure 3

Figure 3

Rx

Tx

Gnd

5 6 7 8 9 10 11 12

+ Rx
+ Tx
Gnd

- Rx
Rxd

- Tx
Txd
Common

RS-232 RS-422 or RS-485

RS-422/485 multi-drop serial configuration allows connection of up to 32 units to a distributed control

system (DCS) or programmable logic controller (PLC). See Figure 4 for the RS422 connection and
Figure 5 for the RS485 connection.

Figure 4 RS422 connection

Gnd

+ Rxd

- Rxd

+ Txd

- Txd

Transmitter # 32 Transmitter # 1

8 9 10 11 12 8 9 10 11 12
+ Rx

+ Rx
+ Tx

+ Tx
Gnd

Gnd
- Rx

- Rx
- Tx

- Tx

RS-422 or RS-485 RS-422 or RS-485

24
 Figure 5 RS485 Connection

Gnd

RS485 +
RS485

Transmitter # 32 Transmitter # 1

8 9 10 11 12 8 9 10 11 12
+ Rx

+ Rx
+ Tx

+ Tx
Gnd

Gnd
- Rx

- Rx
- Tx

- Tx
RS-422 or RS-485 RS-422 or RS-485

“INOVATION” Software: RS232 wiring to PC (COM1/2)

PC (9 pole sub-D connector) PC (25 pole sub-D connector)

Rx (Pin 2) Rx (Pin 3)

Tx (Pin 3) Tx (Pin 2)

Gnd (Pin 5) Gnd (Pin 7)

5 6 7 8 9 10 11 12
+ Rx
+ Tx
Gnd

- Rx
Rxd

- Tx
Txd
Common

RS-232 RS-422 or RS-485

Not only the RS232, but also the RS422 or RS485 can be used for the communication with the
Inovation software. Refer to Figures 3, 4, 5 depending on the desired connection.

25
 Sub-menu parameter selections

Table 2 “PARAM” Menu

PARAMETERS SELECTIONS DESCRIPTION VALUES

FILTER 0 to 9 Digital filtering value 0 = no filtering

(See notes below) (Default = 5) 9 = maximum filtering

MOTION 0 to 4 Weight stabilization 0 = Weight always stable

(Default = 2) 1 = slow stabilization
4 = fast stabilization
AUTO 0 0.0 to 10.0% Auto zero range @ 0 = function disabled
(of net weight value) power up.
0 TRAC 0 to 4 Zero tracking range 0 = function disabled
(Default = 2)
0 BAND 0 to 200 divisions “Zero” key operating 0 = function disabled
(See notes below) (Default = 100) range

Digital filtering affects the update rate and speed of the unit. 0 BAND:
Filter setting =0 Update rate = 25 Hz this parameter defines the operating
Filter setting =1 Update rate = 10 Hz
Filter setting =2 Update rate = 5 Hz
range of the “Zero” key (and Input 1),
Filter setting =3 Update rate = 2.5 Hz used to zero the unit in Gross mode.
Filter setting =4 Update rate = 1.5 Hz
Filter setting =5 Update rate = 1 Hz
Filter setting =6 Update rate = 0.7 Hz
Filter setting =7 Update rate = 0.4 Hz
Filter setting =8 Update rate = 0.2 Hz
Filter setting =9 Update rate = 0.1 Hz

Table 3 “SERIAL” Menu

PARAMETERS SELECTIONS DESCRIPTION

BAUD R 2400, 9600,19200, COM1 Baud rate selection
38400, 115200 Standard baud rate: 9600

PROT-1 NONE CONTIN COM1 Serial port transmission mode selection

(ASCII) DEMAND Standard transmission mode: Continuous
(ASCII) AUTOM
(ASCII) SLAVE (*) The possible Data Format selection for this
(ASCII) MODBUS protocol are: N 8 2 ; E 8 1 ; o 8 1
(*) BCD (Parity, Data bits, Stop bits)

PROT-2 PROFIB COM2 Serial port transmission mode selection

DEVNET
NONE
ADDRES 01 to 32 COM1 Identification address, selectable from 1 to 32
PR ADD 001 to 126 Profibus-DP or DeviceNet node address
DN ADD
DELAY 0.00 to 1.00 Delay in responding to a data request from the host
in “Demand” or “MODBUS” modes (COM1).
Time unit: 1/100 second (maximum 1 second)
REM-CO REMOTE Enables communication with “INOVATION” without
re-positioning jumper (J1) as described on page 9.
DATA F N-8-1 N-8-2 E-8-1 O-8-1 Data Format selection for the ASCII protocols
N-7-2 E-7-1 E-7-2 O-7-1 (Parity, Data bits, Stop bits). See “PROT-1”

26
Sub-menu parameter selections (cont’d)

Continuous transmission:
The transmission speed depends on the digital filter setting and the baud rate value selected.
See Table 4 below for additional information.

Table 4

BAUD RATE
2400 9600 19,200 38,400 115,200

D 0 6 Hz 25 Hz 50 Hz 50 Hz 50 Hz
I 1 6 Hz 25 Hz 50 Hz 50 Hz 50 Hz
G
I 2 6 Hz 25 Hz 50 Hz 50 Hz 50 Hz
T 3 6 Hz 25 Hz 25 Hz 25 Hz 25 Hz
A
L 4 6 Hz 25 Hz 25 Hz 25 Hz 25 Hz

F 5 6 Hz 12 Hz 12 Hz 12 Hz 12 Hz
I 6 6 Hz 12 Hz 12 Hz 12 Hz 12 Hz
L
T 7 6 Hz 12 Hz 12 Hz 12 Hz 12 Hz
E
8 6 Hz 6 Hz 6 Hz 6 Hz 6 Hz
R
9 6 Hz 6 Hz 6 Hz 6 Hz 6 Hz

Driver for the optional BCD Board:

The transmission speed depends on the digital filter setting and the baud rate value selected.
See Table 5 below for additional information.

Table 5

BAUD RATE
2400 9600

D 0 12 Hz 50 Hz
I 1 12 Hz 50 Hz
G
I 2 12 Hz 50 Hz
T 3 12 Hz 25 Hz
A
L 4 12 Hz 25 Hz

F 5 12 Hz 12 Hz
I 6 12 Hz 12 Hz
L
T 7 12 Hz 12 Hz
E
8 6 Hz 6 Hz
R
9 6 Hz 6 Hz

27
Sub-menu parameter selections (cont’d)

Table 6

“IN - OUT” MENU

PARAMETERS SELECTIONS DESCRIPTION

MODE 1 GROSS Operating mode selection for

NET output number 1.
PEAK H

N.O Contact status below the

N.C setpoint value
POS. Comparison with positive or
NEG. negative weight values
NORMAL Output enabled only after the
STABLE weight reading has stabilized.
HYST - 1 Hysteresis setting, used to
(See notes below) (Default = 2) eliminate chattering of the
relay @ coincidence point.
TIMER 1 0.0 to 10.0 The output is disabled after
(0 = disabled) the time period has expired.
(1/10 second increments )
DELAY 1 0.0 to 10.0 Time delay before the output
(0 = disabled) is enabled.
(1/10 second increments)
Same parameter selections as above for output 2

TEST IN See page 17 Test procedure for inputs

TEST OUT Test procedure for outputs

NOTES:

1. The hysteresis setting must be less than it’s respective setpoint value.
Entering a hysteresis setting greater than the setpoint value will automatically
be replaced with a default setting of (2) counts.

2. Hysteresis settings of within 10 counts of their respective setpoint values are

possible, however, much smaller values are normally sufficient.

3. A large hysteresis setting (4,990 counts) could be used as follows:

Setpoint 1 is used to fill a vessel with 5,000 lbs. of product, and setpoint 2 will be
used as a high weight alarm. When the weight in the vessel reaches 5,000 lbs.,
relay # 1 de-energizes stopping the flow, feed, etc. The product is drawn from the
vessel as required, when the weight in the vessel reaches 10 lbs., setpoint # 1’s
relay re-energizes and automatically refills the vessel to 5,000 lbs.

28
 MODBUS RTU PROTOCOL SPECIFICATIONS

1. PRECAUTIONS

The Modbus protocol writes directly into the memory of the instrument.
Use caution when sending data to the instrument:
The data being sent must be within the specified ranges given in the tables on the following pages.
Some of the data is written into the E2prom’s memory (refer to the column in the tables “Stored in
E2prom”) for additional information. This memory can only be written to 100,000 times, therefore,
you should avoid writing continuously into this memory.
To confirm the storage of a new value in the E2prom, perform the MAKE - BACKUP function.
If this function is not performed, all of the newly stored data will be lost when power is removed from
the instrument.
The “Set point” setting does not require the MAKE - BACKUP function to be performed.
The set point values are expressed as number of divisions
This means that any set point value (temporary or permanent) has to be multiplied by the “Display
division” data, in order to obtain the actual value of the set point.
E.G. Assuming that the “display division” value is 0.2; if the PLC asks for a set point value and get
the data “3949” from the instrument, this means that the actual value of the set point is 789.8
(3949 x 0.2 = 789.8)
Even the other weight values are given as number of divisions, except for the “Net weight” and
“Gross weight”.
“Net weight” and “Gross weight” (Modbus addresses 40006 and 40007) are given as absolute
values

Note:
The numeric values on the following pages for (addresses, codes, and data) are represented as
decimal values.

The addresses given in the following tables refer to the standards provided in the Modicon Modbus
Protocol Reference Guide PI-MBUS-300 Rev J.

2. DATA FORMAT

Start Bit : 1
Data Bits : 8, the Least Significant Bit (LSB) is sent first.
Parity : No, Even, Odd
Stop Bits : 1, 2
Possible Data Format Selection: N-8-2 E-8-1 O-8-1

3. LIST OF FUNCTIONS SUPPORTED

Function Description
01 (01) READ COIL STATUS

03 (03) READ HOLDING REGISTERS

04 (04) READ INPUT REGISTERS

05 (05) FORCE SINGLE COIL

06 (06) PRESET SINGLE REGISTER

15 (0F) FORCE MULTIPLE COILS

16 (10) PRESET MULTIPLE REGISTERS

Hexadecimal values between brackets

29
Each single function is explained in detail on pages 32, 33 and 34 of the operator’s manual.
Each function is composed by a Query (request master instrument) and a Response
(answer instrument master). Queries and responses are composed by a sequence of data that
are briefly explained here below (***), please note that the code “0x” before any value indicates that
the value is represented as hexadecimal value.
Besides, all the Modbus addresses (the ones mentioned in the left end column on pages 36 and
37) have to be represented as hexadecimal values, but, only for these addresses, there is an im-
portant rule to be taken into consideration:
Before converting the address into an hexadecimal value, the 1st digit on the left has not to
be considered and the remaining 4 digits have to be decremented by “1”.
1st Example:
To represent the address 40150 (“display division” on page 36) as hexadecimal value, exclude the
digit “4” (remains “0150”), then decrement by 1 the number “0150”. The result is “0149”, now perform
the conversion into hexadecimal. The result is “00 95”. This is the value to be used in the query.
2nd Example:
To represent the address 40102 (“load cells sensitivity” on page 36) as hexadecimal value, exclude
the digit “4” (remains “0102”), then decrement by 1 the number “0102”. The result is “0101”, now per-
form the conversion into hexadecimal. The result is “00 65”. This is the value to be used in the query.

(***)
Address: is the number of the instrument’s address, represented as hexadecimal value
(in this case do not decrement by 1 the number).
Function: is the number of the function to be performed (see the table above)
1st Output address: is the address number where the reading of the outputs status has to start
Number of outputs: is the number of the outputs to be read
1st Input address: is the address number where the reading of the inputs has to start
Number of inputs: is the number of the inputs to be read
Number of bytes: represents the number of bytes which compose a data
2 byte CRC: “Cyclical Redundancy Check”. It’s an algorithm used as checksum.
Total byte: Total number of bytes transmitted. This data is not included in the strings.

4. INSTRUMENT RESPONSE TIME

The response time for most data requests is within 20 milliseconds.

Exceptions:

E2prom Backup command (Maximum time = 350 milliseconds)

Writing of the following registers: Load cell/s total capacity, load cell/s sensitivity, Net weight,
Tare weight, and Filter (Maximum time = 550 milliseconds).

4.1 RESPONSE TIME W HEN CONNECTING SEVERAL SLAVES

Single twisted pair

Query Master to slave 01 Response time slave 01 Response slave 01 20 mSec delay Query Master to slave 02

Double twisted pair

Query Master to slave 01 Response time slave 01 Response slave 01 delay Query Master to slave 02

With a baud rate of 19200 Time = 15 to 20 milliseconds

30
Scheme of the communication time in a Master-Slave RS-485 system, using a double twisted pair.

RTU Baud 9600

8 mSec 1 mSec 8 mSec

Tx PC

Tx Slave 01

Tx Slave 01

RTU Baud 19200

4 mSec 1 mSec 4 mSec

Tx PC

Tx Slave 01

Tx Slave 01

15 mSec

31
 5. LIST OF TRANSMISSION STRINGS

Symbols used in the strings

A = 1 byte for slave address (Example: Slave Nº 17: A = 0 x 11)

5.1. FUNCTION 1: READ COIL STATUS

QUERY

Address Function 1st. Output address Number of outputs 2 byte Total byte

A 0 x 01 0 x 0000 0 x 0008 CRC 8

RESPONSE

Address Function Number of bytes Status of outputs 2 byte Total byte

A 0 x 01 0 x 01 0 x 00 CRC 6

Status of outputs: In this byte each output is identified by 1 bit

The address of the 1st. output is the least significant bit (LSB) in this byte. (1 = On, 0 = Off).

5.2. FUNCTION 2: READ INPUT STATUS NOT USED

5.3. FUNCTION 3: READ HOLDING REGISTERS

QUERY

Address Function 1st. Register address Number of register 2 byte Total byte

A 0 x 03 0 x 0000 0 x 0002 CRC 8

RESPONSE

Address Function Number of bytes 1st. Register 2nd. Register 2 byte Total byte

A 0 x 03 0 x 04 0 x 0064 0 x 00C8 CRC 3 + 2 x Nº of

registers + 2

5.4 FUNCTION 4: READ INPUT REGISTERS (“read only”)

QUERY

Address Function 1st. Register address Number of register 2 byte Total byte

A 0 x 04 0 x 0000 0 x 0001 CRC 8

RESPONSE

Address Function Number of bytes 1st. register 2 byte Total byte

A 0 x 04 0 x 02 0 x 0064 CRC 3 + 2 x Nº of registers + 2

32
5.5. FUNCTION 5: FORCE SINGLE COIL

QUERY

Address Function Output address Status of output 2 byte Total byte

A 0 x 05 0 x 0000 0 x FF00 CRC 8

RESPONSE

Address Function Output address Status of output 2 byte Total byte

A 0 x 05 0 x 0000 0 x FF00 CRC 8

Status of output: (FF00 = On, 0000 = Off)

The response includes the echo of the query

5.6. FUNCTION 6: PRESET SINGLE REGISTER

QUERY

Address Function Register address Register value 2 byte Total byte

A 0 x 06 0 x 0000 0 x 1234 CRC 8

RESPONSE

Address Function Register address Register value 2 byte Total byte

A 0 x 06 0 x 0000 0 x 1234 CRC 8

The response includes the echo of the query

5.7 FUNCTION 7: READ EXCEPTION STATUS NOT USED

5.8 FUNCTION 8: DIAGOSTIC NOT USED

5.11 FUNCTION 11: FETCH COMM EVENT CTR NOT USED

5.12 FUNCTION 12: FETCH COMM EVENT LOG NOT USED

5.15 FUNCTION 15: FORCE MULTIPLE COILS

QUERY

Address Function 1st. Output address Nº of outputs Nº of bytes Status of outputs 2 byte Total byte

A 0 x 0F 0 x 0000 0 x 0002 0 x 01 0 x 00 CRC 10

RESPONSE

Address Function 1st. Output address Nº of outputs 2 byte Total byte

A 0 x 0F 0 x 0000 0 x 0002 CRC 8

Number of outputs: Number of the output to be written, starting from the address.
Number of bytes: Number of bytes transmitted as status of outputs (8 outputs each byte)
Status of outputs: 1 output each bit (1 = On, 0 = Off); the 1st. Output coincides with the least significant bit (LSB) of the 1st.
Byte. Non-significant bits are set to zero.
The response includes the identification of the modified outputs.

33
5.16 FUNCTION 16: PRESET MULTIPLE REGISTERS

QUERY

Address Function 1st. Number of Number of 1st. 2nd. 2 byte Total byte
Register output register bytes Register Register
value value

A 0 x 10 0 x 0000 0 x 0002 0 x 04 0 x 0000 0 x 0000 CRC 7 + 2 x Nº of

registers + 2

RESPONSE

Address Function 1st. Register address Nº of registers 2 byte Total byte

A 0 x 10 0 x 0000 0 x 0002 CRC 8

Number of registers: Number of the registers to be written, starting from the address.
Number of bytes: Number of bytes transmitted as registers value (2 bytes each register)
Registers value: Content of the registers, starting from the 1st.
The response includes the identification of the modified registers.

6 BROADCAST MODE

This function is not implemented in the instrument

7.1. COMMUNICATION ERRORS

The communication strings are controlled by the CRC (Cyclical Redundancy Check). If a communication error occurs, the
slave unit doesn’t answer. The master unit controls a timeout when waiting for the response from the slave. If the slave
doesn’t answer during this timeout, it means that a communication error has occurred.

7.2. ERRORS IN THE RECEIVED DATA

If the string is received correctly but is not executable, the slave answers the master with an EXCEPTION RESPONSE.
The field “function” is transmitted having the most significant digit (MSD) set to 1.

EXCEPTION RESPONSE

Address Function Exception code 2 byte

A Function + 80h 0 x 01 CRC

Description of the Exception codes.

Code Description
1 ILLEGAL FUNCTION (The function is not valid or not supported)

2 ILLEGAL DATA ADDRESS (The specified data address is not available)

3 ILLEGAL DATA VALUE (The data value received is not valid)

34
6 BROADCAST MODE

This function is not implemented in the instrument

7.1. COMMUNICATION ERRORS

The communication strings are controlled by the CRC (Cyclical Redundancy Check). If a communication error occurs, the
slave unit doesn’t answer. The master unit controls a timeout when waiting for the response from the slave. If the slave
doesn’t answer during this timeout, it means that a communication error has occurred.

7.2. ERRORS IN THE RECEIVED DATA

If the string is received correctly but is not executable, the slave answers the master with an EXCEPTION RESPONSE.
The field “function” is transmitted having the most significant digit (MSD) set to 1.

EXCEPTION RESPONSE

Address Function Exception code 2 byte

A Function + 80h 0 x 01 CRC

Description of the Exception codes.

Code Description

1 ILLEGAL FUNCTION (The function is not valid or not supported)

2 ILLEGAL DATA ADDRESS (The specified data address is not available)

3 ILLEGAL DATA VALUE (The data value received is not valid)

35
 List of the Holding Registers (4x)

Modbus Description Range Value Stored in

Address E2prom

Set Points and Weight values Relevant menu

40001 Set point 1 temporary 0 to full scale NO

40002 Set point 2 temporary 0 to full scale NO

40003 Command register 01-05, 10, 12-13, 20 See relative table

(Hex) (page 39)

40004 Set point 1 permanent SET 1 0 to full scale YES

40005 Set point 2 permanent SET 2 0 to full scale YES

40006 Gross weight value (H) 0 to full scale
40007 Gross weight value (L)

40008 Input status byte See relative table

(page 38)

40009 Net weight value (H) 0 to full scale

40010 Net weight value (L)

Peak Value

40020 Peak gross weight 0 to full scale NO

Command data and status registers

40081 Command data register 11 (Hex) See relative table

(page 39)

40082 Status register 00, 03-05 (Hex) See relative table

(page 39)

40083 Status data register 06 (Hex) See relative table

(page 39)

Basic Configuration

40100 Load cell/s total capacity (kg) H CAPAC 0-500000 (1) YES
40101 Load cell/s total capacity (kg) L

40102 Sensitivity of load cell/s SENSIT 1.0000 - 4.0000 (5) YES

40103 Net weight of the weighing system (H) NET 0 to full scale (1) YES
40104 Net weight of the weighing system (L)

40105 Dead load of the weighing system (H) DEAD L 0 to full scale (1) YES
40106 Dead load of the weighing system (L)

40110 Operating mode OPMODE 0-2 (3) YES

40150 Display divisions DSPDIV 0 - 14 (2) YES
See Table “A”

Weighing Parameters

40180 Digital filter value FILTER 0-9 (3) YES

40181 Motion band value MOTION 0-4 (3) YES

40182 Auto zero value AUTO 0 0.1-10.00 (3) (5) YES

40183 Zero tracking value 0 TRAC 0-4 (3) YES

Set Points Configuration

40200 Operating mode Set point 1 MODE 1 YES

40201 Hysteresis Set point 1 HYST 1 0 to full scale YES

40202 Timer Set point 1 TIMER1 0.1-100.0 (5) YES

40203 Delay Set point 1 DELAY1 0.1-100.0 (5) YES

40204 Operating mode Set point 2 MODE 2 YES

40205 Hysteresis Set point 2 HYST 2 0 to full scale YES

40206 Timer Set point 2 TIMER2 0.1-100.0 (5) YES

40207 Delay Set point 2 DELAY2 0.1-100.0 (5) YES

Holding Register Table continued on the following page.

36
 List of the Holding Registers (4x) cont’d

Serial Configuration Relevant menu

40300 Baud rate BAUD R 0-4 (3) YES

40301 Serial address ADDRES 1-32 YES

40302 Response delay DELAY 0-100 YES

Analog Output

40400 Analog output full scale F-SCAL 0 to full scale YES

40401 Analog output operating mode MODE 0-3 (3) YES

40402 Analog output range RANGE 0-3 (3) YES

40403 Zero offset OFFSET (4)

40404 Full scale offset OFFSET (4)

40405 An-Zero (negative weight value for zero ANZERO YES
analog output)

(1) The combined theoretical net and tare weight values must not exceed the total capacity value.
(2) Refer to the 15 values from 0.001 to 50
(3) For the list of values please refer to the user manual.
(4) They are stored in the E2prom if writing the function 0000 in the status register.
(5) When setting these values the decimal point has not to be included.

Serial parameter specifications:

Once the “serial address” and “response delay” have been modified, they take effect immediately.
The serial port mode can’t be modified via Modbus.
When setting a new baud rate value, the power to the instrument must be removed and re-applied in order for the
changes to take effect.

TABLE “A”
IDENTIFICATION CODES

Code Display divisions

0 (00) 0.001

1 (01) 0.002

2 (02) 0.005

3 (03) 0.01

4 (04) 0.02

5 (05) 0.05

6 (06) 0.1

7 (07) 0.2

8 (08) 0.5

9 (09) 1

10 (0A) 2

11 (0B) 5

12 (0C) 10

13 (0D) 20

14 (0E) 50

Hexadecimal values between brackets

37
 Table of the Input Status bytes

Description Bit’s meaning The Modbus address 40008 is composed by

2 bytes. The conversion of these 2 bytes from hex
0 1 into binary gives the meaning of each single bit
Net weight polarity + - described in this table.
1
E.g.
Gross weight polarity + - 0 if the bytes in the address 40008 are 24 85, the
Stable weight no yes conversion into binary gives the sequence of bits
1 100100 10000101.
Millivolt polarity + - 0 The digit at the right hand side matches with the
1st bit (Net weight polarity), therefore the values
Underload condition no yes 0 given in the above mentioned example are equi-
Overload condition no yes valent to:
0
Off range condition no yes 0 Net weight polarity = 1 = negative
Gross weight polarity = 0 = positive
Preset tare condition no yes 1 Weight stability = 1 = yes
Input 1 status De-activated Activated 0 Millivolt polarity = 0 = positive
Underload condition = 0 = no
Input 2 status De-activated Activated 0 Overload condition = 0 = no
Off range condition = 0 = no
Relay output 1 status De-activated Activated 1 Preset tare condition = 1 = yes
Relay output 2 status De-activated Activated 0 Input 1 status = 0 = de-activated
Input 2 status = 0 = de-activated
Scale unloaded (*) no yes 0 Relay output 1 status = 1 = activated
Relay output 2 status = 0 = de-activated
Keyboard status Unlocked Locked 1 Scale unloaded = 0 = no
Keyboard status = 1 = locked

(*) The scale is considered unloaded (empty) when the weight value is within the “0 Band”
range (see “Table 2”, page 26)

List of the Input Registers (3x)

Modbus Description
Address

30003 A/D converter internal counts H

30004 A/D converter internal counts L

30005 Millivolt value

30006 Instrument software release

30007 Instrument “On-line” (*)

Modbus address 30007 = 00 01: the weight value is shown on the display. The instrument is “On-line”
Modbus address 30007 = 00 00: one of the error conditions (underload, overload, offrange) occurs, or any
programming procedure is underway. The instrument is “Off-line”.

List of the coils (0x)

Bit’s meaning
Modbus Description Range value Stored in
Address E2prom
0 1

00001 Logic output 1 De-activated Activated 1 bit NO

00002 Logic output 2 De-activated Activated 1 bit NO

38
 List of the functions “Command register”

Function Codes Description Function Command Stored in

Data Register E2prom

0001 (01 Hex) Semi-automatic zero - NO

0002 (02 Hex) Auto tare - NO

0003 (03 Hex) Peak reset - NO

0004 (04 Hex) Force net weight visualization - NO

0005 (05 Hex) Force gross weight visualization - NO

0016 (10 Hex) Zero calibration - YES

0017 (11 Hex) Full scale calibration Sample weight YES

0018 (12 Hex) Reset zero calibration - YES

0019 (13 Hex) Reset full scale calibration - YES

0032 (20 Hex) Back-up E2prom - YES

List of the functions “Status register”

Function Codes Description Function Status Stored in

Data Register E2prom

0000 (00 Hex) None of the functions are activated - NO

0003 (03 Hex) Analog output zero offset adjustment - YES

0004 (04 Hex) Analog output full scale offset adjustment - YES

0005 (05 Hex) Test input / output - NO

0006 (06 Hex) Test analog output Analog output NO

(0-64000)

For additional information regarding the Modbus protocol, please refer to the Modbus Protocol Manual PI-MBUS-300 Rev J.

39
 Intrinsic Safety Barriers

SAFE AREA HAZARDOUS AREA

Model 400 / 450

Digital / Analog Transmitter MTL Zener Barriers Junction Box

+ Signal + Signal
1 7761 3 + Sen 1
- Exc. 13 - Signal - Signal 1 - Sig - Sen 2
2 4
+ Exc. 14 2 + Sig + Exc 3
+ Sens 15 + Exc. + Exc. 3 - Exc - Exc 4
- Sens 16 3 4 - Sens + Sig 5

- Exc. - Exc. 5 + Sens - Sig 6

- Sig. 17 1 7766
+ Sig. 18 4 6 + Exc Shield 7
2 7 Shield
+ Sense + Sense TB1
1 7761 3 + Sen 1
- Sense - Sense TB5 - Sen 2
2 4 + Exc 3
- Exc 4
40

+ Sig 5
- Sig 6
Shield 7

TB2
+ Sen 1
FUNCTION BARRIER TYPE QTY 1 + Exc - Sen 2
2 - Exc + Exc 3
+/- Signal 7761 Pac 1 3 + Sig - Exc 4
FUNCTION COLOR - Sig
4 + Sig 5
+/- Exc. 7766 Pac 1 5 Shield - Sig 6
+ Exc. Green Shield 7

+/- Sense 7761 Pac 1 TB4

+ Sense Blue TB3

- Exc. Black

- Sense Yellow

+ Signal Red

- Signal White

Shield Bare
Options
Precise™
24 Volt Power Supply
Installation

Make sure the installation complies with local regulations and electrical codes.
Connect AC voltage to the terminals marked “L” and “N”.
The DC voltage is available on the terminals marked “+” and “-”. The second set of terminals
are used when powering two transmitters from a single power supply (See notes).
A red LED is illuminated when the power supply is “ON”.

Notes: The power supply should be used to power two transmitters only when a single load cell is
connected to each transmitter. For multiple load cell applications it is recommended that an
individual power supply be used for each transmitter. This enables the power supply to
compensate for any fluctuations in the incoming line voltage. Recent field experiences have
shown that voltage drops of greater than 10% can cause the transmitters to drift and become
unstable.

Fuse

L N LED + -
Mains in 24 Vdc

Fuse Replacement

The following procedures require work inside the power supply enclosure and should be
performed by qualified service personnel.
Before opening the unit, disconnect the AC voltage.
Remove the front cover from the power supply.
Press down gently on the cover of the fuse holder, and turn counter-clockwise.
Pull out the cover and fuse as an assembly, replace fuse with a new one.
Re-install fuse and cover as an assembly, press down gently and turn clockwise.
Replace the front cover on the power supply.
Re-apply AC voltage to the unit.

In the event of a malfunction, please contact the nearest distributor for assistance.
Any attempt to modify or repair the power supply will void the manufacturers warranty.

41