Störk-Tronic ST46-IN1KAR.112 User manual

Order no. 900237.030 V1.0 Page 1
ST46-IN1KAR.112
Controller for cooling applications
Order number 900237.030
As of: 26.01.2017, Software V1.0
Wiring diagram
Product description
The controller ST46-IN1KAR.112 is intended for the assembly on DIN rail, which allows easy installation in the
switch gear cabinet. It has two analogue inputs for PTC sensors and four switching exits. The functions of the re-
lays can be freely selected, whereas various applications with only one controller are possible. The controller, for
example, can operate with two coolers if the evaporator sensor is parameterized as sensor for a second refrigerat-
ing chamber. The LEDs indicate the status of the control exits. The controller is supplied with 230V AC.
Networking of the controller takes place via ST Bus interface.
Sensor: PTC
Range: - 50 ... 130 °C
Housing size (L x W x H): 95 x 53 x 59mm
Installation: Clip-on mounting on DIN-Rail 35 x 7,5mm
Connector: screw terminal

Order no. 900237.030 V1.0 Page 2

Order no. 900237.030 V1.0 Page 3
SOFTWARE
COOLING CONTROLLER ST46-xxx.112

Order no. 900237.030 V1.0 Page 4
GENERAL INFORMATION
The ST……112 controllers are designed for general
use in refrigerating plants.
Depending on the existing hardware, up to four
temperature sensors can be connected. These can
either be used for capturing the cold store
temperature, evaporator temperature, super-frost core
temperature, the temperature of a second control
circuit or the temperature of the condenser. The type,
function, offset and weighting of each sensor can be
configured separately via parameters. Additionally, an
analogue input (4..20mA) can be made available for
capturing pressure levels, e.g. for condenser/fan
control, provided that the required hardware is
available.
The max. four digital inputs can also be configured
separately, depending on the hardware installed.
Possible functions include: standby, door contact,
high-pressure or low-pressure switch.
Depending on the hardware, up to eight relay outputs
are possible the functions of which can be configured
as required via parameters. Please refer to the
specifications of the hardware installed to ensure that
the relays are not overloaded. Also refer to the circuit
diagram in the corresponding device manual.
All parameters can also be accessed via the RS485
interface. If an internal clock is provided in the
hardware, the corresponding functions, e.g. defrosting
or night-time increase/decrease of setpoint, can be set
and started via parameters.
CONTROL KEYS
Key T1: UP ( up-arrow )
By pressing this key the parameter or parame-
ter value is increased. A further function of the
key can be set with parameters .
Key T2: DOWN ( down-arrow )
By pressing this key the parameter or parame-
ter value is decreased. A further function of the
key can be set with parameter .
Key T3: SET
While SET key is pressed, the setpoint is indi-
cated. The function of the key can be set with
parameter  (unchangeable in this case).
The cooling controller is generally controlled using the
buttons UP, DOWN and SET. The standard display
indicates the temperature of the cold store (actual
temperature value). Press SET button to switch over
the display to the required cold store temperature
(setpoint temperature).
The setpoint temperature can only be changed by
pressing buttons SET and UP or SET and DOWN at
the same time. While pressing the buttons, the
changing setpoint temperature is displayed. After
changing the setpoint temperature and releasing the
buttons, the actual temperature is displayed again.
This is the standard setting method.
In addition to setting the temperature value, the
buttons UP and DOWN perform other functions, too.
Pressing the UP for 3 seconds will trigger a non-
standard defrosting operation of the refrigerating
plant. In the case of an alarm (with buzzer triggered),
the DOWN button can be used for acknowledging the
buzzer sound.
T1
1
2
3
T2 T3
SET

Order no. 900237.030 V1.0 Page 5
PARAMETERISATION
Parameterisation of the cooling controller is done in
the factory or during commissioning of a cold store by
qualified staff. Wrong or inappropriate
parameterisation can result in malfunction and
damage of the refrigerated goods. Parameter setting
is possible only after entering one or more passwords.
In the following list of parameters, all parameters of a
complex cooling controller are listed. Please note,
however, that the parameters listed are only available
in controller designs where the relevant hardware
(outputs, inputs, sensors and internal clock) is
available.
Parameterisation is possible at any time. The control
operation is not interrupted during parameterisation,
but can have a direct influence on it. If no button is
pressed for 2 minutes, the operation is stopped and
the actual value is displayed again.
To activate parameterisation mode, press buttons UP
and DOWN at the same time. After approx. 3
seconds, the code word .will be displayed. Press
UP or DOWN to switch between code words  and
. All other settings / value specifications in
parameter setting mode are performed using the
default value setting method, i.e. pressing buttons
SET and UP / DOWN at the same time.
 NETWORK ADDRESS
Under code word  you can set a
network address. This is required for
commissioning networked systems.
 ENTERING A PASSWORD
By selecting code word , you can
enter a password required for
parameterisation. Once the password
has been entered , the name of the
first group of parameters is displayed
 (alarms). Now, using the buttons
UP and DOWN you can select any of the
parameter groups quickly.
 ALARMS
Once you have selected a parameter
group, it will normally be sufficient if you
press the button SET ( will be
displayed) and then release the button
again. Now, the first parameter of the
group will be displayed (parameter  in
parameter group , for example).
Using the buttons UP and DOWN you can scroll the
parameter group and change certain parameter
values using the default value setting method. Press
buttons UP and DOWN at the same time to quit any
parameter group and return to the list of parameter
groups. To quit the list of parameter groups and return
to the standard level, press buttons UP and DOWN at
the same time.
In some cases, certain parameter groups may be
protected by a password. In this case, you will have to
enter a specific password for the parameter group like
in the case of activation of the parameterisation level.

Order no. 900237.030 V1.0 Page 6

Alarms
*

Buttons and switching inputs

Control circuits 1

Defrosting control circuits 1

Fan control circuits 1

Temperature sensors
*

Pre-defined sets of parameters
*

Networking and display
*

Week timer
*

Relay contacts and lamps
*

Control circuit 2
* These levels by default are protected by a password.

Order no. 900237.030 V1.0 Page 7
 Alarms (password-protected)
Para-
meter
Description of function
Setting range
Values
default

Assignment of alarm sensors, detailed
description of sensors in parameters

through

0: none
1: Sensor F1
2: Sensor F2
3: Sensor F3
4: Sensor F4
5: weighted mean value from F1 and F2
1

Upper limit value
+0.1...+99.0°C (0.0: inactive)
10.0

Lower limit value
-99.0...-0.1°C (0.0: inactive)
-10.0

Switching mode of alarm relay
0: on if alarm present (normal)
1: off if alarm present (inverse)
1

Switching hysteresis for alarm
0.1...15.0°C
2.0

Alarm suppression after temperature alarm
0...240 min.
10

Alarm suppression time after defrosting
0...240 Min
15

Alarm suppression time after control ON or
change of setpoint and/or alarm limits
0...300 Min.
180

Alarm suppression time, door open
0: no alarm
1 ... 600 sec.
180

Behaviour if temperature alarm disappears
again
0: without buzzer, delete automatically
1: with buzzer, delete automatically
2: without buzzer, with acknowledgement
3: with buzzer, with acknowledgement
0

Function buzzer and/or display
in the case of alarm (temp. alarm see

)
0: no display, no buzzer
1: display flashing only
2: buzzer active only
3: display flashing, buzzer active
4: like 2., can be acknowledged
5: like 3., buzzer can be acknowledged
6: like 5., recurring after 
1

Buzzer recurring after acknowledgement
1 ... 120 min.
30

Reset MIN / MAX memory
0: -
1: reset MAX memory
2: reset MIN memory
3: Reset MAX and MIN memory
0

Display of current MAX memory
Measured value, not adjustable

Display of current MIN memory
Measured value, not adjustable

Function of high-pressure switch
Releases until permanent alarm
0: no permanent alarm
1..10 : releases per 15 min.
0

Function of low-pressure switch
Releases until permanent alarm
0: no permanent alarm
1...300 sec.
0

Password of parameter level 
-99 ... 999
0

Order no. 900237.030 V1.0 Page 8
 Buttons and switching inputs (password-protected)
Para-
meter
Description of function
Setting range
Values
default

Function button T1
0: without function
1:controller on/standby
2:defrosting request
3:acknowledge alarm
4:relay function light 1, not active in standby
5:relay function light 1, regardless of standby
6:relay function light 2, not active in standby
7:relay function light 2, regardless of standby
8:relay function window heating, not active in standby
9:relay function window heating, regardless of standby
10:relay function blade scraper, not active in standby
11:relay function blade scraper, regardless of standby
12:relay function door frame heating, not active in standby
13:relay function door frame heating, regardless of standby
14:relay function F, not active in standby
15:relay function F, regardless of standby
16:Set1 / Set2 change-over
17:day / night change-over
18:"super-frost“ on/off
19:evaporator fan on permanently
20:control circuit 1 on/off
21:control circuit 2 on/off
22:set for setpoint Y1
23:display MIN
24:display MAX
25:display sensor F1
26:display sensor F2
27:display sensor F3
28:display sensor F4
29:display sensor F5
30:reset both MIN/MAX
31:reset MIN
32:reset MAX
2

Function button T2
see 
3

Function button T3
see 
0

Function button T4
see 
0

Function button T5
see 
0

Function button T6
see 
0

Function button T7
see 
0

Function button T8
see 
0

Order no. 900237.030 V1.0 Page 9
Para-
meter
Description of function
Setting range
Values
default

Function of external switching
input E1
0:without function
1:controller on/standby
2:high-pressure alarm (see

)
3:low-pressure alarm (see

)
4:door contact (light on, fan off, see

)
5:relay function A (light 1), not active in standby
6:relay function A (light 1), regardless of standby
7:relay function B (light 2), not active in standby
8:relay function B (light 2), regardless of standby
9:relay function C (window heating), not active in standby
10:relay function C (window heating), regardless of standby
11:relay function D (blade scraper), not active in standby
12:relay function D (blade scraper), regardless of standby
13:relay func. E (door frame heating), not active in standby
14:relay func. E (door frame heating), regardless of standby
15:relay function F, not active in standby
16:relay function F, regardless of standby
17:Set1 / Set2 change-over
18:day / night change-over
19:"super-frost“ on/off (see

...

)
20:evaporator fan on permanently
21:defrosting request circuit 1
22:defrosting request circuit 2
23:control circuit 1 on/off
24:control circuit 2 on/off
0

Switching input E1 inverse /
not inverse
0: normal
1: inverse
0

Function E2
see 
0

E2 inverse / not inverse
see 
0

Function E3
see 
0

E3 inverse / not inverse
see 
0

Function E4
see 
0

E4 inverse / not inverse
see 
0

Password of level 
-99 ... 999
-19
 Control circuit 1
Para
-
meter
Description of function
Setting range
Values
default

Assignment of cold store sensors, detailed
description of sensors in parameters

through

0:none
1:Sensor F1
2:Sensor F2
3:Sensor F3
4:Sensor F4
5:weighted mean value from F1 and F2
1

Setpoint for Set1
...
0.0

Night setpoint
(relative to current setpoint  / )
-20 ... +20.0°C 5
.0

Setpoint for Set2
...
0.0

Order no. 900237.030 V1.0 Page 10
Para-
meter
Description of function
Setting range
Values
default

Switching mode
0: heating
1: refrigerating
1

Hysteresis
0.1...15.0°C
2.0

Hysteresis mode
0: symmetrical
1: one-sided
1

Upper setpoint limit
...+99°C
50.0

Lower setpoint limit
-99°C...
-50.0

Start protection after compressor start
0 ... 900 sec.
300

Start protection after compressor stop
0 ... 900 sec.
180

Start protection compressor after mains on
0 ... 60 min.
0

On-time in emergency operation
0 ... 100%
50

Cycle time in emergency operation
5 ... 60 min.
10

Assignment of sensor for "super-frost"
(also core or product temperature)
detailed description of sensors in parameters

through

0:none
1:Sensor F1
2:Sensor F2
3:Sensor F3
4:Sensor F4
5:weighted mean value from F1 and F2
1

"super-frost“: time limit
("shock-frost", "max. cooling power")
1 ... 36 hrs.
10

"super-frost“: temperature limit
("shock-frost", "max. cooling power")
-40 ... 0°C
0.0

"super-frost“: automatic off
("shock-frost", "max. cooling power")
0: none, manual only
1: controlled by time
2: controlled by time or temperature
2

Password of parameter level c
-99 ... 999
0
 Defrosting control circuit 1
Para-
meter
Description of function
Setting range
Values
default

Assignment of evaporation sensors
(defrosting sensors)
detailed description of sensors in parameters

through

0:none
1:Sensor F1
2:Sensor F2
3:Sensor F3
4:Sensor F4
5: weighted mean value from F1 and F2
2

Defrosting interval
0: no automatic defrosting
1...99 hrs.
8

Type of defrosting
0: no defrosting
1: compressor off only (circulating air)
2: electrical
3: with hot gas
2

Stop at defrosting temperature
0 ... +30.0°C
10.0

Defrosting time limitation
1...99 min.
30

Temperature difference to cold store setpoint
in previous cooling
-15°C ... 0.0°C
0.0

Time limitation in previous cooling
1 ... 180 min.
10

Order no. 900237.030 V1.0 Page 11
Para-
meter
Description of function
Setting range
Values
default

Delay of start of defrosting after compressor
off =2
0 ... 900 sec.
60

Dripping time
0 ... 15 min.
1

Stop delay drip tray heating
0 ... 60 min.
10

Password of parameter level 
-99 ... 999
0
 Fan control circuit 1
Para-
meter
Description of function
Setting range
Values
default

Fan speed control mode, Set1
0 ... 100%
80.0

Fan speed defrosting, Set1
0 ... 100%
80.0

Fan speed control mode, Set2
0 ... 100%
100

Fan speed defrosting, Set2
0 ... 100%
100

Start-up time
0 ... 60 sec.
5

Minimum speed (output variable if result=0)
0 ... 100%
10.0

Evaporator fan
Fan mode normal operation
Remark: Control setpoint if

>4
is

or

0: off
1: continuous operation
2: like 1, with drip interruption
3: with compressor on
4: temperature-controlled
evaporator sensor only
5: temperature-controlled, diff. between cold
store and evaporator sensor
3

Evaporator fan,
Fan mode defrosting
0: off
1: on
0

Evaporator fan, delay after compressor start
0 ... 600 sec.
0

Evaporator fan, Delay after defrosting
0 ... 600 sec.
120

Evaporator fan
Drip interruption time if =2
0 ... 600 sec. 18
0

Evaporator fan, Control offset if =4 or 5
-15.0 ... +15.0°C
0.0

Evaporator fan, hysteresis if =4 or 5
0.1 ... 15.0°C
2.0

Password of parameter level 
-99 ... 999
0

Order no. 900237.030 V1.0 Page 12
 Temperature sensors (password-protected)
Para
-
meter
Description of function
Setting range
Values
default

Mains frequency 0: 50Hz
1: 60Hz
0

Act. value sensor F1
Measured value, not adjustable

Calibration sensor F1 (act. value correction)
-20...+20.0°C
0.0

Weighting factor sensor F1
0.50...1.50
1.00

Selection sensor F1
Depending on hardware, not all types are
available. Sensor will be deactivated in this case.
0: not existing
1: PTC (-50..+150°C)
2: Pt100 2-wire (-100…+600°C)
3: Pt100 3-wire (-100…+500°C)
4: NTC (-40…+40°C)
5: Pt1000 2-wire (-100…+330°C)
6: Pt1000 3-wire (-100…+300°C)
7: 0-20mA
8: 4-20mA
1

Software filter sensor F1
1 ... 32
8

Display at 0/4mA and sensor selection =7/8
-99...+999
0.0

Display at 20 mA and sensor selection =7/8
-99...+999
100

Act. value sensor F2
Measured value, not adjustable

Calibration sensor F2 (act. value correction)
-20...+20.0°C
0.0

Weighting factor sensor F2
0.50...1.50
1.00

Selection sensor F2
see 
1

Software filter sensor F2
1 ... 32
8

Display at 0/4 mA and sensor selection =7/8
-99..+999
0.0

Display at 20 mA and sensor selection =7/8
-99..+999
100

Act. value sensor F3
Measured value, not adjustable

Calibration sensor F3 (act. value correction)
-20...+20.0°C
0.0

Weighting factor sensor F3
0.50...1.50
1.00

Selection sensor F3
see 
1

Software filter sensor F3
1 ... 32
8

Display at 0/4 mA and sensor selection =7/8
-99..+999
0.0

Display at 20 mA and sensor selection =7/8
-99...+999
100

Act. value sensor F4
Measured value, not adjustable

Calibration sensor F4 (act. value correction)
-20...+20.0°C
0.0

Weighting factor sensor F4
0.50...1.50
1.00

Selection sensor F4
see 
0

Software filter sensor F4
1 ... 32
8

Display at 0/4 mA and sensor selection =7/8
-99…+999
0.0

Display at 20 mA and sensor selection =7/8
-99…+999
100

Display of weighted mean value of F1+F2
 = (* + (100-)*)/100

Weighting of sensor F1 for 
0 ... 100%
100

Password of parameter level 
-99 ... 999
-19

Order no. 900237.030 V1.0 Page 13
 Pre-defined parameter sets (password-protected)
Para-
meter
Description of function
Setting range
Values
default

Parameter set
---
0

Password for entering level selection (in
display  )
-99 ... 999
-19

Password of parameter level 
-99 ... 999
-19
Parameter  can only be viewed and set via ST-bus.
Warning: Changes made in the parameter set will change all parameter settings.
 Networking and display (password-protected)
Para
-
meter
Description of function
Setting range
Values
default

Own address ST-bus
Identical to setting 
0: deactivated
1 ... 250
1

Temperature scale 0: °C
1: °F
0

Display mode 0: 3 digits, integers
1: 3 digits, rounded to 0.5
2: 3 digits, 0.1
3: 4 digits, integers
4: 4 digits, rounded to 0.5
5: 4 digits, 0.1
2

Display value
See act. value table
0

Software version

Display in standby mode 0: OFF
1: AUS
2: right decimal point
3: right decimal point flashing
4: time, OFF in case of an error
1

ST bus release mask for functions
0 ... 255
249

ST bus release mask for functions
0 ... 255
255

Release for a deletion of the
counter/runtimes
0: no release
1: Delete is approved for 10 min.
(see A17, N98 and T98)
0

Password of parameter level 
-99 ... 999
-19

Order no. 900237.030 V1.0 Page 14
 Relay contacts and lamps (password-protected)
Para
-
meter
Description of function
Setting range
Values
default

Function relay K1 0: no function (off)
1: compressor
2: defrosting circuit 1
3: evaporator fan
4: condenser fan
5: alarm
6: control contact circuit 2
7: defrosting circuit 2
8: relay function A (light 1)
9: relay function B (light 2)
10: relay function C (window heating)
11: relay function D (door frame heat.)
12: relay function E (blade scraper)
13: relay function F
14: drip tray heating
15: buzzer
16: on if controller active
17: on if control circuit 1 active
18: on if control circuit 2 active
19: on if Set 1 active
20: on if Set 2 active
21: on if day mode active
22: on if night mode active
1

Function relay K2
see 
2

Function relay K3
see 
3

Function relay K4
see 
5

Function relay K5
see 
0

Function relay K6
see 
0

Function relay K7
see 
0

Function relay K8
see 
0

Order no. 900237.030 V1.0 Page 15
Para-
meter
Description of function
Setting range
Values
default

Function LED1
0: no function (off)
1: compressor/magnetic valve
2: defrosting control circuit 1
3: evaporator fan
4: condenser fan
5: alarm
6: control circuit 2
7: defrosting circuit 2
8: Light 1
9: Light 2
10: window heating
11: blade scraper
12: door frame heating
13: relay function F
14: drip tray heating
15: "super-frost“
16: "humidity"
17: control circuit 1 active
18: control circuit 2 active
19: set 1 active
20: set 2 active
21: day mode active
22: night mode active
23: display "MIN"
24: display "MAX"
1

Function LED2
see 
2

Function LED3
see 
3

Function LED4
see 
0

Function LED5
see 
0

Function LED6
see 
0

Function LED week days
0: no function (off)
1: display weekday
2: see ...
0

Function LED7 (Mo)
see 
0

Function LED8 (Tu)
see 
0

Function LED9 (We)
see 
0

Function LED10 (Th)
see 
0

Function LED11 (Fr)
see 
0

Function LED12 (Sa)
see 
0

Function LED13 (Su)
see 
0

Password of parameter level 
-99 ... 999
-19

Order no. 900237.030 V1.0 Page 16
 Control circuit 2 (password-protected)
Para
meter
Description of function
Setting range
Values
default
 
Assignment of sensors to control circuit 2
detailed description of sensors in parameters

through

0:none
1:Sensor F1
2:Sensor F2
3:Sensor F3
4:Sensor F4
5:weighted mean value from F1 and F2
0
 
2nd control circuit: setpoint
 ... 
10.0
 
2nd control circuit: abs. setpoint or DeltaW
0: absolute
1: DeltaW
1
 
2nd control circuit: switching mode
0: heating
1: refrigerating
1
 
2nd control circuit: hysteresis
0.1...99.0°C
2.0
 
2nd control circuit: hysteresis mode
0: symmetrical
1: one-sided
1
 
Upper setpoint limit
 ... +999°C
50.0
 
Lower setpoint limit
-99°C ... 
-50
 
Function in the case of sensor fault
0: contact off
1: contact on
1

Defrosting interval control circuit 2
0: no defrosting
1...99 hrs.
0

Defrosting time limitation thermostat 2
1...99 min.
30

Password of parameter level 
-99 ... 999
-19
N-level (counters)
Parameters are only accessible via ST-Bus.
Para-
meter
Description of function
Setting range Values
default
N0
Switching cycles of K1 (lower 16bit)
---
N1
Switching cycles of K1 (upper 16bit)
---
N2
Switching cycles of K2(lower 16bit)
---
N3
Switching cycles of K2 (upper 16bit)
---
N4
Switching cycles of K3 (lower 16bit)
---
N5
Switching cycles of K3 (upper 16bit)
---
N6
Switching cycles of K4 (lower 16bit)
---
N7
Switching cycles of K4 (upper 16bit)
---
N98
Reset counter
0: ---
1: Reset
0
N99
Password for N-level
-99 … 999
0
The number of switching cycles is calculated as follows (i.e. for K1): number =65536 * N1 + N0.
Parameter N98 resets the counters for all relays. It depends on the setting of parameter L42. The return value is
set back to “0” automatically.

Order no. 900237.030 V1.0 Page 17
T-level (operating times)
Parameters are only accessible via ST-Bus.
Para-
meter
Description of function
Setting range Values
default
T10
Overall operating time (lower 16bit)
---
T11
Overall operating time (upper 16bit)
---
T12
Operating time since last reset (lower 16bit)
---
T13
Operating time since last reset (upper 16bit)
---
T14
Operating time relay K1 (lower 16bit)
---
T15
Operating time relay K1 (upper 16bit)
---
T16
Operating time relay K2 (lower 16bit)
---
T17
Operating time relay K2 (upper 16bit)
---
T18
Operating time relay K3 (lower 16bit)
---
T19
Operating time relay K3 (upper 16bit)
---
T20
Operating time relay K4 (lower 16bit)
---
T21
Operating time relay K4 (upper 16bit)
---
T98
Reset operating times
0: ---
1: Reset
0
T99
Password for T-level
-99 … 999
0
The operating time is calculated as follows: Operating time (in minutes) =65536 * T11 + T10.
Parameter T98 resets the counters for all operating times (except for T10 und T11). It depends on the setting of
parameter L42. The return value is set back to “0” automatically

Order no. 900237.030 V1.0 Page 18
MASTER PASSWORD
All passwords can be edited through parameterisa-
tion. If you don't remember a password, you can still
parameterise the controller and look up and/or edit the
password via a master password. To do that, follow
these steps:
1. Switch off power supply (disconnect from mains or
switch off power supply unit)
2. Press buttons UP, DOWN and SET at the same
time and switch on power supply again.
3. Now, a ("Challenge") number will be displayed for
approx. 5s.
In no case disconnect the controller from power sup-
ply now. Otherwise, the number will become invalid.
Using this number, you can call our sales staff, phone
[phone] to request the master password
("Response"). Enter this master password in the 1st
control level in .
Important: Even if you remember the password, you
must enter the master password here. If the pass-
word is accepted, you will enter the parameter selec-
tion levels and all passwords will be deactivated. By
pressing the SET button (display ) you can switch
to the relevant parameter level.
Now, the master password is no longer required. The
passwords will remain deactivated until the controller
is disconnected from power supply again. In case you
leave the parameter level now, simply press the SET
button in  in order to access the parameter selec-
tion levels again.
STATUS DISPLAYS AND ERROR MESSAGES
Message
Cause
Remedy

Overtemperature, temperature above
alarm limit of parameter A1/A31

Undertemperature, temperature below
alarm limit of parameter A2/A33

Error on sensor F1, short-circuit
check sensor F1

Error on sensor F1, wire broken
check sensor F1

Error on sensor F2, short-circuit
check sensor F2

Error on sensor F2, wire broken
check sensor F2

Error on sensor F3, short-circuit
check sensor F3

Error on sensor F3, wire broken
check sensor F3

Error on sensor F4, short-circuit
check sensor F4

Error on sensor F4, wire broken
check sensor F4

Door open for too long
close door

High
-pressure fault
Check: Condenser fan and check for dirt ac-
cumulation

Low-pressure fault
Plant leaking, to little coolant

Internal error in control unit
Repair control unit

Error in parameter memory
Check all parameters

Error in data memory
Repair control unit

Error of internal clock
Set clock again. If error occurs again, the co
n-
troller must be repaired
Errors  and  will disable the controller. The controller will only be enabled again once the error has been
repaired. Error  (and ) can only be eliminated by repair. The errors and the current temperature will be
displayed alternately.

Order no. 900237.030 V1.0 Page 19
 Alarms
 Alarm sensor assignment
With this parameter, you can set which sensor input is
to be used as the alarm sensor.
 Upper limit value
 Lower limit value
The limit values are used for monitoring the cold store
temperature. They are relative values, i.e. they always
refer to the setpoint S1. If the temperature increases
above or falls below the upper and lower limits, re-
spectively, an alarm as specified in  will be trig-
gered. If [ = 0] and/or [ = 0], the relevant limit
alarm is deactivated.
 Switching mode of alarm relay
With this parameter you can define if the relay is to be
closed or opened in the case of an alarm.
 Switching hysteresis for alarm
The alarm contact hysteresis is set asymmetrically,
downward at the upper alarm value and upward at the
lower alarm point.
 Alarm suppression time after temp. alarm
If the temperature of the cold store exceeds the limits
set in , , a temperature alarm should normally be
triggered. Based on the suppression time set in ,
triggering of the alarm can be delayed.
 Alarm suppression time after defrosting
Triggering of a temperature alarm is prevented for the
set time after defrosting so that the plant can reach
normal operating conditions again.
 Alarm suppression time after Refrigerating On
Triggering of an alarm is suppressed for the set time
after activation of refrigeration. This is to allow the
refrigerating plant to reach the working temperature
range without triggering of an alarm.
 Alarm suppression time, door open
With this parameter you can define after which time an
alarm is to be triggered when the door is opened. If
the door is closed again within the specified time, no
alarm will be triggered.
 Behaviour when temp. alarm disappears
Here, you can define if a temperature alarm can be
deleted automatically as soon as the temperature is in
the permissible range again or if it must be acknowl-
edged. This is to ensure, for example, that a tempera-
ture alarm that occurred at night remains present until
the error is acknowledged the next day. If the tempera-
ture alarm is still present when it is acknowledged, the
buzzer will be switched off as set in , the alarm
message in the display, however, will remain present
until the temperature is within the permissible range
again. Then, the acknowledged alarm will be deleted
automatically.
 Buzzer function and/or display in the case
of an alarm
Here, you can define if a temperature alarm is to be
displayed or not and if the buzzer is to sound. Addi-
tionally, you can define if the buzzer is to sound again
after acknowledgement. The corresponding time is
indicated in . The error message and the tempera-
ture will be displayed alternately as long as the alarm
is present. If more than one alarm messages are pre-
sent, they will be displayed alternately. The alarm relay
will signal the alarm at all times.
 Buzzer recurring after acknowledgement
Alarms which have not been eliminated will be
switched on again by the buzzer after the set time.
This only applies if [=6].
 Reset MIN / MAX memory
With this parameter, you can delete the MIN and/or
MAX memory.
 Display of current MAX memory
Here, you can view the current MAX memory.
 Display of current MIN memory
Here, you can view the current MIN memory.
 High-pressure function: Releases until alarm
In the case of a high-pressure signal via a parameter-
ised switching input, the compressor will be switched
off immediately and a message will be displayed. If the
high-pressure signal disappears within 15 minutes, the
error message will be deleted and the compressor will
be started again. However, an alarm via the alarm
relay will only be triggered if the number of registered
releases (within 15 min.) set in this parameter is ex-
ceeded or if the signal is present for more than 15
minutes. This fault will only be deleted after discon-
nection of the plant from mains supply (and repair!).
 Low-pressure function: Delay until alarm
If a low-pressure signal is present via a parameterised
switching input and it does not disappear within the
time specified here, the compressor will be switched

Order no. 900237.030 V1.0 Page 20
off and an error message will be displayed. This fault
will only be deleted after disconnection of the plant
from mains supply (and repair!).
 Password for parameter level 
With this parameter, you can set the password for
parameter level .
 Buttons and switching
inputs (password-protected)
 …  Function buttons 1 … 8
Certain functions can be assigned to the buttons. The
buttons are arranged according to the front foil, the
layout may differ from case to case. For the function of
the buttons, refer to the operating manual of the rele-
vant device. The "SET" cannot be assigned another
function!
, , ,  Function E1 … E4
Certain functions can be assigned to the switching
inputs.
, , ,  Switching mode E1 … E4
Here, you can define if the switching input is used as a
make contact (normal) or break contact (inverse).
 Password for parameter level 
With this parameter, you can set the password for
parameter level .
 Control circuit 1
 Assignment of cold store sensors
With this parameter, you can set which sensor input is
to be used as the cold room sensor. The selected sen-
sor must be set up accordingly in the parameters.
 Control circuit 1: Setpoint (Set1)
 Control circuit 1: Night-time incr./decr.
 Control circuit 1: Setpoint (Set2)
With this parameter, you can set the setpoint. It will be
displayed directly if you press the SET button and can
be edited. The setting range is defined by the settings
in parameters  and . Setpoint  becomes active
if the Set2 function is switched on via a button, a digital
switching input, the internal clock or the ST-bus. Set-
point  becomes active if the night-time increase/
decrease function is switched on via a button, a digital
switching input, the internal clock or the ST-bus. The
value of  is added to the currently active setpoint 
or .
 Control circuit 1: Switching mode
The switching mode of the control output can be set to
heating or refrigerating function. In the case of the
heating function, the control output is switched on if the
actual temperature is lower than the set temperature.
In the case of the refrigerating function, the output is
on if the temperature is higher than the setpoint.
 Control circuit 1: Hysteresis
In this parameter, you can specify the control hyste-
resis. A small hysteresis enables exact control, but will
result in frequent switching of the relay.
 Hysteresis mode
With this parameter you can define if the hysteresis will
be active at the corresponding switching point symmet-
rically or on one side only. In the case of a one-sided
hysteresis, the hysteresis will be active below the set-
point in the case of the heating function [=0] and
above the setpoint in the case of the refrigerating func-
tion [=1]. In the case of a symmetrical hysteresis,
there is no difference.
 Upper setpoint limit
 Lower setpoint limit
Setpoints  and  can only be set within the limits
defined here.
 Start protection after compressor start
This protection time starts as soon as the compressor
is switched on. When the compressor is switched off, it
cannot be switched on again until this time has
elapsed. This is to avoid excessive activation and to
increase the service life as a consequence.
 Start protection compressor after
compressor stop
This protection time starts as soon as the compressor
is switched off. The compressor cannot be switched on
again until this time has elapsed. This is to avoid ex-
cessive activation and to increase the service life as a
consequence.
 Start protection compressor after mains On
Activation of the control output is prevented after
"Mains On" until this time has elapsed. This function
can be used, for example, to avoid that several control-
lers are switched on at the same, which would result in
a high load on the power supply network.
On-time in emergency operation
 Cycle time in emergency operation
With these parameters, you can define how the com-
pressor is to behave in the case of a sensor fault. In