PXM20 (Inglese) Display
PXM20 (Inglese) Display
PXM20 (Inglese) Display
DESIGO™ PX
Networkable operator unit for viewing and operating one or several DESIGO PX
automation stations.
High-grade display with adjustable contrast
Simple key operation with direct access to the required plant information
Generic operation and display of plant functions (alarm handling, time
schedulers, calendars, setpoint adjustments, display of current values, etc.)
Integrated acoustic and/or visual collective alarm
Graphic online-trend function
Support of integrated access protection in the overall DESIGO system
Ability to add or delete new users
Automatic logout
Heating curve graphics
System date and time setting
Wiring test for IOs
Context-sensitive help function
Installation in modular automation station PXC..-U or remote
CA1N9231en
Siemens Building Technologies
08.2001 Building Automation
Application
The PXM20 operator unit ensures the convenient display and operation of DESIGO PX
automation stations via BACnet network communication. The graphics-based display
with clear text and direct access via the keyboard ensure a most user-friendly
operation.
Functions
All values visible in the system can be displayed in accordance with the defined
operator profile. Typical displays:
Display of current values
Setpoint and parameter settings
Maintenance and error messages
Alarm lists and single alarm messages with acknowledgement option and/or reset
Time schedulers (7-day schedules and exception programs)
Plant switching
Login and password inputs
An integrated collective alarm message system with acoustic and visual indication is
provided.
Operating concept As the PXM20 operator unit is designed for end-user operation the operating concept
concentrates on the simplest and clearest possible display following intuitive operating
principles rather then displaying as many values as possible.
Any text is displayed as clear text in the chosen language.
To ensure a clear orientation for any operator the two top display lines (header lines)
always show which building services system or which function is currently in
operation.
The basic concept of the operation ensures that it is always possible to select direct,
with the click of a button on the keyboard, the plant information shown on the
relevant line (direct access keys).
Any settings or modifications (for example in graphics) can be followed direct on the
display (e.g. graphics display for scheduler).
The basic concept also ensures that all information and help functions can be called
up any time (info key).
6 4 5
1 Display
2 Alarm LED: The alarm LED lights up or flashes if an alarm is present in the system.
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Generic operation and Due to the application program each menu tree is different. Navigation through the
display menu tree is based on the so-called ClickDown procedure using the navigation keys.
Alarms and events If the PXM20 receives an alarm or an event appears on the display a pop-op window
appears with the relevant information.
Visual and acoustic When an alarm is present the alarm LED flashes and changes to steady light when all
alarm alarms have been acknowledged. The acoustic alarm is provided as an option and can
be activated optionally when an alarm is triggered.
AlarmViewer Alarms are written into the AlarmViewer with a symbol, a description and a time/date
stamp in chronological order. An acknowledgement mask to acknowledge alarms can
be called up in the AlarmViewer. After acknowledgement the alarm entry disappears
from the AlarmViewer; however, it will continue to be saved in the history list. Further
details can be viewed in the alarm history (e.g. out of service, overridden, deadband,
present value, etc.)
The PXM20 history can contain max. 60 entries; the older ones are deleted.
Scheduler The Scheduler allows the user a time-dependent switch on/off and the programming of
time-dependent setpoint adjustments.
The Scheduler consists of a 7-day schedule and an exception program.
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Online trend
.
The PXM20 operator unit provides the user with five channels for trend logging, enabling 5
data points to be logged.
There are three separate ways of viewing the trend data:
1 Graphical view: Int his view all the values of a trend datapoint stored in PXM20 will be
displayed graphically
2 Online graphical view : In the online view the values will be displayed in a grsphical and
dynamic manner, i.e. in real time.
3 List: In place of a graphic view, the values can be displayed in list form
Info concept Press info key to switch to info mode. In this info mode two different kind of information
can be called up:
Pressing the info key a second time displays general information for the currently
displayed object (e.g. complete path, clear text of object).
Pressing a direct access key in info mode displays information for the object or value
on the selected line.
Exit the info mode by pressing any key.
Auto logout If no operator activities are carried out within a set period the device switches off
and sleep mode automatically and the display is turned off.
Pressing any key activates the device automatically again and the background lighting
of the display is switched on.
Language versions When the operator unit is delivered the language is set to English. The language setting
can be changed internally to one of the following languages: Dutch, French, German,
Italian and Swedish.
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Compatibility
Design
The PXM20 operator unit is contained in a robust plastic housing, ideally suited for its
many different mounting methods.
All indicators and controls are mounted on the front cover of the unit (see page 2).
The connections for the automation stations are incorporated on the back of the unit
(see page 7).
Disposal The printed circuit board and the housing must be disposed of separately in
accordance with local regulations.
Mounting instructions
The PXM20 is suitable for control panel front mounting or vertical panels (e.g. remote
operating panels or similar units). The unit is also suitable for DIN rail snap-mounting.
In addition, the PXM20 can be mounted direct on any modular automation station.
Commissioning
Wiring test When using networkable PXM20 units it is possible to carry out a wiring test of
connected field devices even without a loaded application program. The field devices
are shown with the current value and unit.
Switchless The binary inputs and outputs for the commissioning phase before the programming
commissioning can also be set with plant switches. They remain under control until the voltage at the
devices is switched off again.
Technical data
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Connections
00264 RJ45 socket PIN allocation
for service tool
G0,GND
LON A
LON B
RXD
TXD
NC
NC
NC
1 2 3 4 5 6 7 8
00266
RXD
TXD
NC
NC
1 2 3 4 5 6 7 8
00265
Dimensions
All dimensions in mm
00342 00343
117
210 37
ø 4.8
47.4
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