KM-20

ELEVATOR DOOR CONTROLLER

USER MANUAL
 www.arkel.com.tr

Publisher ARKEL Elektrik Elektronik Ticaret Ltd. Şti.

Bostanci Yolu Cad. Sehit Sk. No:36 Yukaridudullu Istanbul TURKIYE

Tel: (+90 216) 540 03 10 – 11 - 12

Fax: (+90 216) 540 03 09

E-mail: info@arkel.com.tr

www.arkel.com.tr

Date of issue 10.2010

Document version V1.5

Hardware version V1.9

Software version V4.55

10.2010 2 KM-20
 www.arkel.com.tr
CONTENTS
1. INTRODUCTION ......................................................................................................................................................... 4
2. TECHNICAL SPECIFICATIONS ...................................................................................................................................... 5
3. OVERVIEW OF KM-20 DOOR CONTROLLER ................................................................................................................. 6
4. DESCRIPTION OF TERMINALS..................................................................................................................................... 7
5. DESCRIPTION OF LED’S .............................................................................................................................................. 8
6. GENERAL WARNINGS ................................................................................................................................................ 9
7. CONNECTION DIAGRAM .......................................................................................................................................... 10
8. CONTROL INPUTS CONNECTION .............................................................................................................................. 11
8.1. CONTROL INPUTS CONNECTION WITH INTERNAL SUPPLY ........................................................................................................... 11
8.2. CONTROL INPUTS CONNECTION WITH EXTERNAL SUPPLY .......................................................................................................... 11
9. ONBOARD KEYPAD & DISPLAY ................................................................................................................................. 12
9.1. ONBOARD KEYPAD FUNCTIONS .................................................................................................................................. 12
10. KM-20 KEYPAD (OPTIONAL) ................................................................................................................................... 13
10.1. LCD DISPLAY & KEYPAD ............................................................................................................................................. 13
10.2. KM-20 KEYPAD FUNCTIONS ...................................................................................................................................... 13
10.3. MONITORING & OPERATION SCREENS ..................................................................................................................... 14
11. ACCESSING MENU ................................................................................................................................................. 16
12. PARAMETERS ........................................................................................................................................................ 17
13. PARAMETER SETTING WITH ONBOARD KEYPAD..................................................................................................... 18
14. PARAMETER SETTING VIA KM-20 KEYPAD.............................................................................................................. 19
14.1. GENERAL PARAMETER SETTINGS .............................................................................................................................. 19
14.2. DOOR OPENING SETTINGS ........................................................................................................................................ 22
14.3. DOOR CLOSING SETTINGS ......................................................................................................................................... 23
14.4. MOTOR SETTINGS ..................................................................................................................................................... 24
14.5. PI SPEED REGULATOR ADJUSTMENT ......................................................................................................................... 25
15. EMERGENCY OPERATION....................................................................................................................................... 26
15.1. EMERGENCY DOOR OPENING WITH 'KAT' INPUT ...................................................................................................... 26
16. STATUS MESSAGES ................................................................................................................................................ 27
17. ERROR MESSAGES ................................................................................................................................................. 28
18. TROUBLESHOOTING .............................................................................................................................................. 29
19. DIMENSIONS ......................................................................................................................................................... 31

10.2010 3 KM-20
 www.arkel.com.tr
1. INTRODUCTION

KM-20 controller is an “intelligent” door control board designed for automatic telescopic lift doors with
24VDC reduction gear motor. It provides advance features for high comfort, high dynamic performance
and flexible usage.

• KM-20 provides complete hold of the motor with its 4-region motor control and high resolution
encoder input hardware.
• In addition to this hardware, it allows swift but comfortable motion of doors with its software that
provides S-softening in travel ramps and which has the algorithm that does not require limit switches.
• It provides features for auto-learning of door travel limits without open-close limit switches.
• In order to work with the control panels in complete harmony it can generate “Doors are completely
open”, “Doors are fully closed” and “Obstruction or photocell detected” signals. These signals enable
it to work for fire lift doors.
• A nudging function is included with buzzer sound and slow speed closing after a long time photocell
interrupt.
• In case of mains failure, it can get the power from batteries or 24VDC external supply. The emergency
supply type can be selected easily via a jumper on board.
• KM-20 protects the battery from over-charge with a smart battery charge system. After an emergency
opening with battery supply, KM-20 goes into sleep mode and protects the batteries from over-
discharge.
• With a door opening zone signal input, doors can be kept closed until the car is moved to the just floor
during emergency evacuation.
• It provides a parameter menu which has access levels for security, user/customer needs and easy
adjustment.
• It provides many functions and parameters for manufacturing companies that enable application
flexibility, like motor reduction ratio, motor revolution, motor sheave circumference and skate open
zone.
• It provides user friendly parameter setting with speed units in cm/s and travel distance units in cm.
• It provides a counter for the information of opening-closing times.
• Basic parameters (Door opening-closing speed, obstruction pressure, signal type and demo mode) can
be adjusted easily by user via built-in 7-segment displays and buttons.
• Optional KM-20 Keypad allows access to all its parameters, functionality and monitoring screens.
• Availability of multiple languages: Turkish, English and Greek

10.2010 4 KM-20
 www.arkel.com.tr
2. TECHNICAL SPECIFICATIONS

Input supply:
Supply voltage: 20VAC±10%
Max. Power consumption: 10W (control circuit) + Motor power
Supply protection: Short-circuit protection (8A)
Motor outputs:
Motor voltage: 24VDC
Motor output power: Max. 200W (8A)
Motor control type: 4-region motor control
Motor protection: Motor output overload and short circuiting protection
Encoder inputs:
Encoder type: Incremental (2-channel incremental encoder)
Encoder resolution: Any model between 100 pulse and 2048 pulse
Encoder voltage: 5V DC
Note: Encoder is not included
Output signals:
Door open signal
Outputs for control panels: Door closed signal
Door obstruction or photocell detected signal
with relay contact output
Output type:
3A @ 250V AC or 30V DC
Input signals:
Open signal
Door control & speed signals: Close signal
(Opto-coupled) Low speed
High speed
Photocell & obstruction signal
Other inputs: Car is at floor level signal
1 programmable input (reserved)
Input type: Activated with 24VDC
Battery connection:
Battery voltage: 2 pieces 12V batteries
Internal battery charge: Included
- With fuse
Battery protection:
- Battery over-discharge protection with sleep mode operation.
User interface:
Standard interface: 2-digit 7-segment display and 4 keys
Optional interface: KM-20 Keypad
Warning sound: With buzzer
Language options: Turkish, English, Greek
Mechanical features:
Dimensions: 116 x 160 x 50 mm (width x length x height)
Working capability:
Door opening: 0.5m - 3m
Door opening velocity: Max. 50 cm/s

10.2010 5 KM-20
 www.arkel.com.tr
3. OVERVIEW of KM-20 DOOR CONTROLLER

1
ARKEL
KM-20 2
3
4
5

6
7
8
9
10
11
12
7 8 9 10 11 12

13 14 15 16 17 18
Figure-1: Overview of KM-20 Door Controller

1- Mounting holes
2- 2-digit 7-segment display
3- Optional KM-20 Keypad connection socket
4- Programming socket (Not for user connection!)
5- 4-button keypad
6- Control chip
7- Motor driving transistors
8- Ac input supply fuse
9- Emergency supply selection jumper (Battery or external 24VDC supply)
10- Sleeping mode activation relay
11- Battery supply fuse
12- Door is fully open & closed, door re-open (door obstruction or photocell) relays
13- Motor output terminals
14- AC power supply and emergency supply terminals
15- Encoder input terminals
16- Door control input terminals
17- Photocell input, door opening zone input and reserve input terminals
18- Relay output terminals

10.2010 6 KM-20
 www.arkel.com.tr
4. DESCRIPTION of TERMINALS

Motor output MOT : Motor output

AC power supply input 20Vac : 18-22VAC power supply input

Emergency supply input + : +24VDC emergency supply (Battery or external supply)

AKU - : -24VDC

Encoder terminals A : Encoder channel A

B : Encoder channel B
GND : GND
+5V : +5V

Control signals COM : Common of control signals

OPEN : Open signal
CLOSE : Close signal
SLOW : Slow speed (Nudging) signal
FAST : High speed signal

Other input terminals +24V : +24Vdc internal supply for input signals
GND : Ground for internal supply (0Vdc)
FSL : Photocell signal
KAT : Additional door opening zone signal (During evacuation)
PI1 : Reserved input (Not available for this revision!)

Relay output terminals 3A : Reopening (Obstruction or photocell) contact output (NO)

3O : Reopening contact common
2A : Door closed contact output (NO)
2O : Door closed contact common
1A : Door open contact output (NO)
1O : Door open contact common

10.2010 7 KM-20
 www.arkel.com.tr
5. DESCRIPTION of LED’S

ARKEL Supply indicators

KM-20

Relay indicators
Input indicators

Figure-2: Description of Led’s

Supply indicators Status Description

+5V supply is active
 ON
5V (Supply for microcontroller and encoder)
 OFF +5V supply is inactive
+15V supply is active
 ON
15V (Supply for motor drive circuit)
 OFF +15V supply is inactive
+24V supply is active
 ON
24V (Supply for motor output, relay’s coil, and control signals)
 OFF +24V supply is inactive

Supply indicators Status Description

 ON Doors are fully open
R1
 OFF Doors are not fully open
 ON Doors are fully closed
R2
 OFF Doors are not fully closed
 ON Photocell or obstruction detected
R3
 OFF No reopening output
 ON Emergency supply is active (from terminals AKU+ and AKU-)
R4
 OFF AC power supply is active (from terminals 20Vac)

Input indicators Status Description

 ON Open signal is active
OPEN
 OFF Open signal is inactive
 ON Close signal is active
CLOSE
 OFF Close signal is inactive
 ON Slow close (Nudging) signal is active
SLOW
 OFF Slow close signal is inactive
 ON High speed signal is active
FAST
 OF High speed signal is inactive
 ON Photocell is detected
FSL
 OFF Photocell is not detected
 ON Additional door opening zone signal is activate (emergency opening)
KAT
 OFF Additional door opening zone signal is inactivate
 ON Reserved input is active (Not available for this revision!)
PI1
 OFF Reserved input is inactive

10.2010 8 KM-20
 www.arkel.com.tr
6. GENERAL WARNINGS

• The ac power supply voltage must be between 18V .. 22Vac. Supplies over 22Vac may be
hazardous for the controller.

• The power of input supply transformer must be minimum 10VA more than the motor power.

• Door motor must be 24VDC reduction gear motor and maximum motor power must be 200W.

• 100-2048 pulse incremental encoders are supported. Encoder must have 2 channel output (A and
B) and the operating voltage must be 5Vdc. Encoders with higher resolutions provides more
accurate measurements and improves motor ascendancy.

• According to the EN81, door movement must be prevented when emergency stop, inspection or
recall modes engaged. Door operation with a single command can only be used for old door
units.

• According to EN 81, the maximum static closing force must not exceed 150N. Higher static
closing forces may cause serious injuries.

• According to EN81, the maximum kinetic energy of the door in closing direction must not
exceed 10J and for nudging closing (reduced speed closing) the maximum kinetic energy must
not exceed 4J.

• The voltage applied to inputs of the door controller must not exceed 28Vdc.

• The relay output contacts of the door controller must not be used as safety circuit contact in the
safety circuit of the elevator.

10.2010 9 KM-20
 www.arkel.com.tr
7. CONNECTION DIAGRAM

KM-20 Keypad connection (Optional)

R1 Doora are fully

open Outputs to lift control mainboard
(Max. 3A @ 250VAC or 30VDC)
R2 Doors are fully
closed Note: The relay contacts must not be
Obstruction or used as safety contact in the safety
R3 circuit of the elevator!
photocell

Reserved input
Additional door opening zone signal input
Photocell signal input
Internal supply
24VDC / 0.1A (Inputs are activated with 24VDC internal supply)

Inputs from lift control system

Can be supplied with internal or external 24Vdc.
Refer to Figure-4 and Figure-5

Note: For V1.9 and higher version controllers,

positive or negative common is selectable.

+5Vdc operation voltage

100-2048 pulse
2-channel encoder

24V DC geared motor, max. 8A

24V DC emergency supply

(with 2 pcs. 12V/1.2Ah battery or
external supply)
KM-20

18-22VAC 220VAC AC power supply

Min. trans. power = 10VA + motor power

Figure-3: Connection diagram
10.2010 10 KM-20
 www.arkel.com.tr
8. CONTROL INPUTS CONNECTION

8.1. Control inputs connection with internal supply

Internal supply With internal supply

24VDC / 0.1A from terminals +24V & GND

High speed

Slow closing
(Nudging) Inputs from lift
control system
Close

Open

Figure-4: Control inputs connection with internal supply

8.2. Control inputs connection with external supply

_
With +24Vdc external supply
+ from lift control system

High speed

Slow closing
(Nudging) Inputs from lift
control mainboard
Close

Open

Figure-5: Control inputs connection with external supply

Note: For V1.9 and higher version controllers, the inputs are dual channel opto-coupled. Positive or
negative common is selectable. In the sample figures above only connection with negative common
is shown.

10.2010 11 KM-20
 www.arkel.com.tr
9. ONBOARD KEYPAD & DISPLAY

KM-20 door controller provides a parameter setting and monitoring in a limited access level via onboard
4-button keypad and 2-digit 7 segment displays.

Note: For controlling the menu and diagnosis in basic level or in manufacture level, an optional terminal
KM-20 Keypad is needed. In the parameter list table the access level of the parameter is also shown
(Limited, Basic or Manufacture)

UP

← →

DOWN Figure-6: Onboard keypad & display

In limited access level only a few parameters are allowed to be change:

- Door opening-closing speed
- Obstruction pressure
- Signal type
- Demo mode

In normal operation door opening-closing speed is monitored in cm/s on digital display, if an error occurs
the error code is monitored. The description of error codes are explained in the error messages section.

9.1. ONBOARD KEYPAD FUNCTIONS

Outside the menu:

Door opens while holding down the key (Door opening in manual
UP Up
operation)
Door closes while holding down the key (Door closing in manual
DOWN Down
operation)
→ Right Door auto-learning operation

← Left To access menu press and hold the key for 3 seconds

Inside the menu:

UP
Changes the parameter value
DOWN

→ Changes the parameter

← Exit menu (By pressing once).

Note: Inside the menu, if no changes will be done in 30 seconds controller will exit menu and
automatically switches back to normal operation. The last menu changes will be saved.

10.2010 12 KM-20
 www.arkel.com.tr
10. KM-20 KEYPAD (Optional)

With an optional terminal KM-20 Keypad menu and diagnosis can be controlled in basic or manufacture
access level.

Figure-7: KM-20 Keypad (Optional)

10.1. LCD DISPLAY & KEYPAD

KM-20 Keypad provides 2-line 16-character LCD module and 4-button keypad.

2-line 16-character
LCD module
Figure-8: KM-20 Keypad user interface

10.2. KM-20 KEYPAD FUNCTIONS

On main screen:

Up Changes the screen

Door opening-closing in manual operation (Door opens if door is closed and door
Down
closes if door is open while pressing the key)
Right Door auto-learning operation
Left To access menu press and hold the key for 3 seconds

On manual operation screen:

Changes the screen

Door opens while holding down the key (Door opening in manual operation)

Door closes while holding down the key (Door closing in manual operation)

Inside the menu:

Changes the parameter

Changes the parameter value

Note: To exit menu, pres the right button until the message “EXIT FROM MENU” will appear on
the screen then press up or right button.
Note: Inside the menu, if no changes will be done in 30 seconds controller will exit menu. The last
menu changes will be saved
.

10.2010 13 KM-20
 www.arkel.com.tr
10.3. MONITORING & OPERATION SCREENS

KM-20 Keypad display shows a main screen (door status), control signal screen (input signals) and
manual operation screen.

Start-up screen Main screen

Counter screen

Manual operation

Control signals

Figure-9: KM-20 Keypad screens

When the power is first applied, KM-20 Keypad display shows the software version.

ARKEL KM-20 V:x.x

Figure-9.1: Start-up screen

Then the main screen is shown. In the main screen, door position, door speed and door operating
status are monitored. If an error occurs it is also shown in this screen.

Door position P: 82cm V: 0cm/s Door speed

(0 cm while door is open) DOOR CLOSED Door operating status or error

Figure-10: Main screen

On the control signals screen the status of the input signals from the lift controller opening, closing,
slow closing (nudging) and high speed signals are monitored.

Opening signal OPEN:- CLOSE:- Closing signal

Slow closing (Nudging) SLOW:- FAST:X High speed signal

- : signal is inactive X : signal is active

Figure-11: Control signals from the lift controller

10.2010 14 KM-20
 www.arkel.com.tr

On the manual operation screen, door can be opened and closed by the user via keypad.

MANUEL MOVMENT
Door opens while holding
CLOSE _ >
_ Door closes while holding
down the left key < OPEN down the right key

Figure-12: Manuel operation screen

Note: On this screen, the door control signals (open, signal etc.) are ignored. If no operation will be
done on this screen in 60 seconds, controller will exit this screen and automatically switch back to
normal operation.

The information of door opening-closing time is monitored in the counter screen.

OPEN/CLOSE COUNT
Total opening/closing time 000000389

Figure-12.1: Counter screen

10.2010 15 KM-20
 www.arkel.com.tr
11. ACCESSING MENU

KM-20 door controller provides a parameter menu which has access levels for security, user/customer
needs and easy adjustment. These access levels are limited level, basic level and manufacture level.

Accessing menu with the keypad on board is limited level. KM-20 Keypad is required for accessing menu
in a basic level or in a manufacture level.

Note: Following steps should be done via KM-20 Keypad to enter menu in a manufacture level.
- Deenergize KM-20.
- Energize KM-20 while pressing and holding UP and DOWN buttons together.
- KM-20 will directly enter to the advanced menu. The parameters like “ENCODER PULSE” and
“GEAR RATIO” become visible and available to be changed from this menu.

Standart (on-board) Optional (via KM-20 Keypad)

Startup
Limited level

MENU Basic level Manufacture level

Limited MENU MENÜ

settings
Menu Menu
language language

Speed Speed
settings settings

Default Default
settings settings

Custom Custom
settings settings

Other Manufacture
parameters settings

Other
parameters

Figure-13: Accessing menu

10.2010 16 KM-20
 www.arkel.com.tr
12. PARAMETERS

Parameter name Parameter code

Parameter group Access Level
On KM-20 Keypad display On digital display

LANGUAGE - - Basic
SPEED SETTINGS  - Basic
OPENING SPEED - SPEED SETTINGS > CUSTOM SETINGS Basic
OPENING SLOW SPD - SPEED SETTINGS > CUSTOM SETINGS Basic
OPEN RAMP LENGHT - SPEED SETTINGS > CUSTOM SETINGS Basic
OPEN SLOW AREA - SPEED SETTINGS > CUSTOM SETINGS Basic
CLOSING SPEED - SPEED SETTINGS > CUSTOM SETINGS Basic
CLOSING SLOW SPD - SPEED SETTINGS > CUSTOM SETINGS Basic
CLS.RAMP LENGHT - SPEED SETTINGS > CUSTOM SETINGS Basic
CLOSE SLOW AREA - SPEED SETTINGS > CUSTOM SETINGS Basic
SKATE ZONE - - Manufacture
SKATE OPEN SPEED - - Manufacture
SKATE CLS. SPEED - - Manufacture
OPEN HOLD FORCE - - Manufacture
CLOSE HOLD FORCE - - Manufacture
LEARNING SPEED - - Manufacture
OBSTRUCTION PRS.  - Limited
SIGNAL TYPE  - Limited
DEMO MODE  - Limited
ENCODER PULSE - - Manufacture
SPEED CONT. KP - - Manufacture
SPEED CONT. KI - - Manufacture
GEAR RATIO 1 - - Manufacture
GEAR RATIO 2 - - Manufacture
W.CIRCUMFERENCE - - Manufacture
COUNT CLEAR CODE - - Manufacture

10.2010 17 KM-20
 www.arkel.com.tr
13. PARAMETER SETTING with ONBOARD KEYPAD

The type of door speed setting.

 Speed settings Normally, only factory default values,  or  can be selected. Besides “”
values appears if any custom setting has been done by user via KM-20
Keypad under speed settings.

 Slow defaults Speed setting parameters will be set to slow default values.
 Normal defaults Speed setting parameters will set to normal default values.
 Fast defaults Speed setting parameters will set to fast default values.
The custom setting has been done by user via KM-20 Keypad. If no custom
 Custom settings
setting is made, this value will not appear.

Obstacle
 detection
The maximum opening-closing force applied to overcome an obstacle.

 Demo mode Door test operation.

Door is in test operation. Door opens and closes continuously with a few
 Enabled seconds intervals. The control signals (open, close etc.) will be ignored. The
reopening signals (photocell or obstacle detection) are still functional.

 Disabled Door is in normal operation.

 Signal type The type of door control signals.

The door controller will be controlled by two separate inputs. 24Vdc voltage
Open-Close applied to terminal “Close” will cause the doors to close. And terminal
 signals “Open” will cause the door to open. If no signal is applied, the door remains
its position. If both inputs are applied the close signal has priority.
The door controller will be controlled by a single input. Only “Close” signal
is used and “Open” signal is not used. 24Vdc voltage applied to terminal
“Close” will cause the doors to close. Interrupting the voltage causes the
door to open. During the absence of voltage the door remains open.
 Close signal
Note: According to the EN81 door movement must be prevented when
emergency stop, inspection or recall modes engaged. This adjustment can
only made for old door units.

10.2010 18 KM-20
 www.arkel.com.tr
14. PARAMETER SETTING via KM-20 KEYPAD

14.1. GENERAL PARAMETER SETTINGS

LANGUAGE Menu language

TURKCE Turkish
ENGLISH English
Ελληνικά Greek

The type of door speed settings. All speed parameters can easily be set
to default values or can be adjusted separately. The speed setting
parameters only appear when this parameter is set to “CUSTOM
SETINGS”. Otherwise these parameters will be set to default values
and will not appear in menu.
These speed setting parameters are:
SPEED SETTINGS
- OPENING SPEED
- OPENING SLOW SPD
- OPEN RAMP LENGHT
- OPEN SLOW AREA
- CLOSING SPEED
- CLOSING SLOW SPD
- CLS.RAMP LENGHT
- CLOSE SLOW AREA

SLOW DEFAULTS Speed setting parameters will be set to slow default values.
NORMAL DEFAULTS Speed setting parameters will set to normal default values.
FAST DEFAULTS Speed setting parameters will set to fast default values.
CUSTOM SETINGS Each speed setting parameter can be adjusted separately.

OPEN HOLD The holding force constantly applied to motor after door fully opens to remain
FORCE door open (to overcome the closing force because of the door spring)

CLOSE HOLD The holding force constantly applied to motor after door fully closes to remain
FORCE door closed (to overcome the opening force because of the skate spring)

10.2010 19 KM-20
 www.arkel.com.tr

The maximum opening-closing force applied to overcome an obstacle

If an obstacle is detected in the closing operation, door stops, gives a warning

to lift controller by activating the obstruction relay output (R3) and fully opens.
Then obstruction relay is deactivated. After the “close signal” is given by the
controller door tries to close again with normal travel speed up to the obstacle.
Then it decelerates near the obstacle. If door overcomes the obstacle it
continues the rest of the way at normal closing speed. This action is repeated
continuously for as long as the obstacle remains.
OBSTRUCTION
PRS. If an obstacle is detected in the opening operation, door stops. Obstruction
relay (R3) remains deactivated. Door remains in this position and waits “close
signal” from lift controller for 15 seconds. If no close signal is given after this
waiting period door tries to reopen with normal travel speed up to the obstacle.
Then it decelerates near the obstacle. If door overcomes the obstacle it
continues the rest of the way at normal opening speed. This action is repeated
continuously for as long as the obstacle remains.

Note: According to EN81, the maximum static closing force must not exceed
150N.

LEARNING
Door auto-learning speed during the measurement of the door travel length
SPEED

DEMO MODE Door test operation

Door is in test operation. Door opens and closes continuously with a few
ENABLED seconds intervals, The control signals (open, close etc.) will be ignored. The
reopening signals (photocell or obstacle detection) are still functional.
DISABLED Door is in normal operation.

10.2010 20 KM-20
 www.arkel.com.tr

SIGNAL TYPE The type of door control signals

KM-20 will be controlled by two separate inputs. 24Vdc voltage applied to
OPEN/CLOSE terminal “Close” will cause the doors to close. And terminal “Open” will cause
SNGL. the door to open. If no signal is applied the door remains its position. If both
inputs are applied the close signal has priority.
KM-20 will be controlled by a single input. Only “Close” signal is used and
“Open” signal is not used. 24Vdc voltage applied to terminal “Close” will
cause the doors to close. Interrupting the voltage causes the door to open.
During the absence of voltage the door remains open.
CLOSE SIGNAL

Note: According to the EN81 door movement must be prevented when

emergency stop, inspection or recall modes engaged. This adjustment can only
made for old door units.

The security code used for clearing the opening/closing counter. The count clear
COUNT code (max. 4-digit) can be set by using up and down buttons. It requires to exit
CLEAR CODE menu after setting the security code. If the code entered is correct, the
open/close counter will be cleared after the menu is closed.

10.2010 21 KM-20
 www.arkel.com.tr
14.2. DOOR OPENING SETTINGS

Adjust door opening settings by referring to Figure-14.

OPENING SPEED The maximum opening speed

OPENING SLOW SPD Opening slow speed when door reaches to the opening rubber stopper

The opening distance while door accelerates (from slow speed to

OPEN RAMP
opening speed) and while door decelerates (from opening speed to slow
LENGHT
speed)

OPEN SLOW AREA The opening distance with slow speed up to the opening rubber stopper

SKATE OPEN SPEED Skate opening speed

SKATE ZONE The distance that is required for skate to fully open

Figure-14: Door opening travel curve

10.2010 22 KM-20
 www.arkel.com.tr
14.3. DOOR CLOSING SETTINGS

Adjust door closing settings by referring to Figure-15.

CLOSING SPEED The maximum closing speed

CLOSING SLOW SPD Closing slow speed when door reaches to the closing rubber stopper

The closing distance while door accelerates (from slow speed to closing
CLS.RAMP LENGHT
speed) and while door decelerates (from closing speed to slow speed)

CLOSE SLOW AREA The closing distance with slow speed up to the closing rubber stopper

SKATE CLS. SPEED Skate closing speed

SKATE ZONE The distance that is required for skate to fully closed

Figure-15: Door closing travel curve

MAX. DOOR CLOSING SPEED

According to EN81, the maximum kinetic energy of the door in the closing direction must not exceed
10J. And for nudging closing (reduced speed closing) the max. kinetic energy must not exceed 4J.
This can be calculated by the formula:

Maximum kinetic energy = (1/2) x Km x (Vmax^2)

Km: Total door panel weight (kg)

Vmax: Maximum speed of the door (m/s)

An example for a calculation of maximum speed:

Km = 120 kg
The maximum closing speed Vmax(normal) = 0,4 m/s
The maximum nudging speed Vmax(nudging) = 0,25 m/s

10.2010 23 KM-20
 www.arkel.com.tr
14.4. MOTOR SETTINGS

ENCODER PULSE The pulse of the encoder per revolution

GEAR RATIO 1 Motor speed in rpm

GEAR RATIO 2 Reduction output speed in rmp (Motor speed / Reduction Ratio)

W.CIRCUMFERENCE Door wheel circumference

GEAR RATIO 1 GEAR RATIO 2

ENCODER PULSE
W. CIRCUMFERENCE

Figure-16: Motor settings

Samples to determine motor gear ratio from motor name plate are shown below:

Sample motor name plate 1: Speed: 3000 (200)

GEAR RATIO 2 = 200

GEAR RATIO 1 = 3000

Sample motor name plate 2:

Speed: 3000 GEAR RATIO 1 = 3000
Gear ratio: 15:1 GEAR RATIO 2 = 3000/15 = 200

10.2010 24 KM-20
 www.arkel.com.tr
14.5. PI SPEED REGULATOR ADJUSTMENT

SPEED CONT. KP The differential factor of PI speed regulator

SPEED CONT. KI The integral factor of PI speed regulator

“SPEED CONT. KP” and “SPEED CONT. KI” parameters determine the PI speed regulator’s
reaction sensitivity which adjusts the motor speed.

The integral factor KI multiplies the total of errors so must be adjusted to very smaller than KP
otherwise it causes vibration and overshoots at travel curve. Usually it is better to adjust KP > 10xKI.

If KI and KP are too high it makes noise at motor. Too small values cause delays to catch the reference
speed and sensitivity loss.

Σ
Speed + 1 Output torque
reference KP + * KI
S reference

Limiter

Encoder feed-back signal

Figure-17: PI speed regulator adjustment

10.2010 25 KM-20
 www.arkel.com.tr
15. EMERGENCY OPERATION

In case of mains failure, KM-20 can get the power from batteries or 24VDC external supply. The
emergency supply type can be selected via a jumper on board. Below the jumper setting is shown.

Note: This setting is only needed when 24Vdc voltage is supplied to terminal AKU+ and AKU- for
emergency operation. If door controller will be supplied continuously from 20VAc power input (with an
UPS or an Emergency Evacuation Unit) there is no need to make this adjustment.

Setting Pin selection Description

Emergency If battery connection is made to terminals AKU+ and
supply selection AKU- for emergency operation then this setting must
(with 1 jumper) be configured. The battery voltage must be 24Vdc (2
pieces 12V/1.2Ah). KM-20 controls battery charge.
With
After an emergency opening with battery supply, KM-
BATT.
20 cuts the battery supply and goes into sleep mode to
protect the batteries from over-discharge. After ac
voltage is applied to power supply input then
controller will switch back normal operation.

If external 24Vdc supply is applied to terminals

AKU+ and AKU- (from lift controller) instead of
With battery connection for emergency operation, then this
Ext. setting must be configured. Door controller will be
PS. continuously supplied by this voltage and never goes
into sleep mode. When 24Vdc voltage is applied door
controller operates in normal mode.

15.1. EMERGENCY DOOR OPENING WITH 'KAT' INPUT

During emergency operation (in case of mains failure) “OPEN” and “CLOSE” inputs are functional.
Door opening and closing signals can be applied to these terminals. In addition, during emergency
operation, “KAT” input (a separate door opening zone signal) is also becoming functional. When this
input is activated door opens. This feature can be used to keep door closed when the elevator car is not
just at the floor level.

10.2010 26 KM-20
 www.arkel.com.tr
16. STATUS MESSAGES

KM-20 KEYPAD displays the status of door operation. Below these messages are listed:

Status message Description

DOOR OPENED Door is fully open. The door position data P: 0cm.

DOOR CLOSED Door is fully closed. The door position data P will be the door length.

Door is opening. The door opening speed and door position data is shown on
DOOR OPENING
display.

Door is closing. The door closing speed and door position data is shown on
DOOR CLOSING display.

10.2010 27 KM-20
 www.arkel.com.tr
17. ERROR MESSAGES

The error messages of KM-20 door controller which are shown either on KM-20 Keypad display or
onboard digital display are listed below:

KM-20 Keypad On-board

Description Reason
LCD module digital display

* Door mechanically blocked

CLS. Obstacle detected * Obstruction pressure value is too low
OBSTRUCTION  during closing * Encoder is faulty
* Ac power supply is too low
,

* Door mechanically blocked

OPEN Obstacle detected * Obstruction pressure value is too low
OBSTRUCTION  during opening * Encoder is faulty
* Ac power supply is too low

10.2010 28 KM-20
 www.arkel.com.tr
18. TROUBLESHOOTING

DOOR DOES NOT MOVE

- Check the power led 24V on the board. If 24V led is OFF check the ac power supply and the ac
supply fuse on the left side of the board.
- Check the motor power connection on terminals MOT.
- Check the parameter “SIGNAL TYPE” (parameter  on digital display). When this parameter is set
to “OPEN/CLOSE SNGL.” door will not move until a command is given from terminals OPEN or
CLOSE. Check these input leds. In order to test these inputs, disconnect the wiring of OPEN and
CLOSE terminals. Then test these inputs by making a bridge between terminals: GND > COM, 24V
> OPEN and 24V > CLOSE.
- Check that door is not mechanically blocked

DOOR PANELS ARE OPENING-CLOSING RAPIDLY AND UNCONTROLLABLY

- Check motor and encoder wirings. When you move the door manually the speed of door must be
shown on display.
- Encoder channel-A and channel-B connection may be wrong. Interchange these inputs.

DOOR DOES NOT OPEN

- When door open signal is activated OPEN led on board must be ON. If OPEN led is OFF be sure
that lift controller gives open command.
- Check that the CLOSE led is OFF. If close signal is active door does not open because close signal
has priority.
- If the parameter “SIGNAL TYPE” (parameter  on digital display) is set to “CLOSE SIGNAL” check
that close signal is not active.
- Check that door is not mechanically blocked.

DOOR DOES NOT CLOSE

- When door close signal is activated CLOSE led on board must be ON. If CLOSE led is OFF be
sure that lift controller gives close command.
- Check that door is not mechanically blocked.

DOOR MOVES IN REVERSE DIRECTION

- Door connection may be wrong. Interchange the motor power outputs and at the same time
interchange the encoder channels A and B.

DOOR HITS or DOOR DECELERATES EARLY

- Be sure that the auto-learning operation is done properly

- Check that door speed setting are adjusted correctly

DOOR OFTEN DETECTS OBSTACLE

- Check that door has no mechanical defect.

- Check that obstruction pressure is not too low.
- Check that encoder is not faulty.
- Check that Ac power supply is not too low

10.2010 29 KM-20
 www.arkel.com.tr
DOOR PANELS ARE VIBRATING

- Check that the encoder is connected correctly.

- Check the PI speed regulator settings (SPEED CONT. KP and SPEED CONT. KI)
- Check that door has no mechanical defect.

DOOR FULLY OPENS THEN IT MOVES 1-2cm BACK AND TRIES TO OPEN AGAIN

- Door open hold force may be too low and door cannot overcome the closing force because of
the door spring.
- At that floor, landing door spring may be too strong.

DOOR MOTOR and DRIVE CIRCUIT IS HEATING UP EVEN DOOR STOPS

- Check that the opening and closing hold force are not too high.

10.2010 30 KM-20
 www.arkel.com.tr
19. DIMENSIONS

50mm

116mm

160mm
Figure-18: Front-right side view

160mm

ARKEL
KM-20
116mm

107mm

151mm
Mounting holes : Ø4mm

Figure-19: Front view

10.2010 31 KM-20
 www.arkel.com.tr

ARKEL Elektrik Elektronik Ticaret Ltd. Şti.

Bostanci Yolu Cad. Şehit Sok. No:36 Yukaridudullu Istanbul TURKIYE
Tel: (+90 216) 540 03 10 - 11 -12
Fax: (+90 216) 540 03 09
E-mail: info@arkel.com.tr
www.arkel.com.tr

10.2010 32 KM-20