STORK TRONIC ST181-VL4KA.12 User manual

ST181-VL4KA.12
Controller for cooling applications
Order number 900223.015
Old Id.Nr.: 377416
Wiring diagram
Product description
The cooling controller ST181-VL4KA.12 is a control unit specifically designed for 24V DC ven-
tilation adjustment. The maximum ventilation power is 10W. The number of revolutions can be
decreased to 20% and thus create a minimum air speed. Due to the galvanic separation of the
ST181-controller the low-voltage ventilator can also be safely operated in a wet environment.
Thethreeswitchingoutputswithourproven16Arelayallowcompleteoperationofthecoolingcircle
as well as further additional features, as for example the lighting and many other functions.The
timer allows a 1-week time management for the defrosting periods as well as for setting the cooling
chambertemperature at nightor onthe weekend.With regard to the parameterlevel,programming
of this timer is easy and user-friendly. The actual time can be re-set simply directly on the operator
surface.
Sensor: PTC
Range: -55...130◦C
Front size: 180mm x 52mm
Panel cut-out: 159mm x 45mm
1

Tightness: front IP65
Connector: Wieland terminal
2

SOFTWARE .12
Adjustment options
Key UP
Defrosting can be started any time by pressing the UP-key for 3 seconds. During the
process of defrosting the respective LED is illuminated. The LED flashes if defrosting is
requested, but may not be started yet due to interlock conditions.
Key DOWN
The DOWN key, among other functions, can acknowledge an alarm. The internal buzzer
is then switched off.
Press this key more than 5 seconds to switch the display to permanent time indication.
Press the SET key to switch back to temperature indication.
Function key 4 (time)
By pressing this key the actual time of the internal real time clock is indicated in the
display. The colon of the time display flashes. Pressing also the UP or DOWN key at the
same time the clock can be adjusted. With the first adjustment the flashing stops and
after releasing the key the new value is saved. For precise adjustment, hold the key
pressed until a specific time and release it to start.
Pressing the key for 5 seconds the switch-over to data record 2 is deactivated for the
actual day. This is indicated by a flashing point on the right side of the display.
The data record switch-over can be deactivated permanently by parameter H0.
Key SET
While SET key is pressed, the setpoint is indicated.
In addition, the SET key is used for setting parameters.
Function key 1 (if available)
Different functions are assigned to this key by help of parameters, see parameter b1.
It is pre-set for data record switch-over (together with key UP or DOWN).
Function key 2
Different functions are assigned to this key by help of parameters, see parameter b2.
(Direct switching of a contact, setpoint indication thermostat 2). The key must be
pressed for at least half a second.
Function key 3 (standby)
With this key the controller is switched to standby mode. Pressing the key a second
time, restarts the unit. The key can be deactivated by setting the respective parameter,
see parameter b3.

First control level:
Parameter setting for the main setpoint.
If none of the keys is pressed, the display indicates the actual value of the temperature. Pressing
the SET key, the setpoint shows on the display.
If the setpoint is to be changed, the SET key is to be kept pressed while adjusting the setpoint with
the keys UP and DOWN.
Please note that the setpoint can only be changed within the set setpoint limits.
General reference
Note that the value is transferred to the captive memory and is safe also after power failure.
Para-
meter Function Adjustment range Standard setting Customer setting
S1 Setpoint for refrigerating
chamber, data record 1 r1...r2 0.0°C
S2 Setpoint for refrigerating
chamber, data record 2 r1...r2 0.0°C
Second control level:
Setting of control parameters
The parameters can also be set in standby mode. Simultaneously pressing the UP and DOWN key
for at least 4 seconds opens a parameter list containing frequently used parameters (the complete
list of all parameters is to be found on the third control level).
With the UP and DOWN keys the list can be scrolled in both directions.
Pressing the SET key will give you the value of the respective parameter. Pressing also the UP or
DOWN key at the same time the value can be adjusted.
Return to the initial position takes place automatically, if no key is pressed for 45 seconds, or by
simultaneously pressing the UP and DOWN key for approx. 4 seconds.
Para-
meter Function Adjustment range Standard setting Customer setting
r0 Hysteresis for the compressor
contact 1...15 K 2 K
P2 Indication actual value of
sensor F2
(only available if P4≠0)
-
Y1 Setpoint thermostat 2
(only available if P4=2) -50...+150°C 10°K
Y2 Hysteresis for thermostat 2
(only available if P4=2) 0,5...15 K 2 K
H0 Activation of data record 2 0: not active
1: active depending on
switching time
0
H2 Display manual reset at data
record 2 0: flashing point if key pressed
1: flashing point until end
of day
0

Para-
meter Function Adjustment range Standard setting Customer setting
H11 Time to switch to data record
2, Monday 0:00...23:59 0:00
H12 Time to switch to data record
1, Monday 0:00...23:59 0:00
H21 see H11, Tuesday 0:00...23:59 0:00
H22 see H12, Tuesday 0:00...23:59 0:00
H21 see H11, Wednesday 0:00...23:59 0:00
H22 see H12, Wednesday 0:00...23:59 0:00
H21 see H11, Thursday 0:00...23:59 0:00
H22 see H12, Thursday 0:00...23:59 0:00
H21 see H11, Friday 0:00...23:59 0:00
H22 see H12, Friday 0:00...23:59 0:00
H21 see H11, Saturday 0:00...23:59 0:00
H22 see H12, Saturday 0:00...23:59 0:00
H21 see H11, Sunday 0:00...23:59 0:00
H22 see H12, Sunday 0:00...23:59 0:00
H81 Starting time 1. defrost, daily 0:00...23:59 0:00
H82 Starting time 2. defrost, daily 0:00...23:59 0:00
H83 Starting time 3. defrost, daily 0:00...23:59 0:00
H84 Starting time 4. defrost, daily 0:00...23:59 0:00
H85 Starting time 5. defrost, daily 0:00...23:59 0:00
PA Access to parameters of third
control level
Password: "-19"
-99...+99
Programming cycle for switching times
Selection and adjustment:
By pressing the function key 4 after selection of the parameter to be adjusted, the respective
switch-time is indicated and can be set by additionally pressing the UP or DOWN key. Releasing
all keys, the new value is saved long term.
The parameters with odd numbers always determine the switch-over to data record 2, the following
parameters with even numbers determine the switch-back to data record 1. The leading number of
the parameter symbolizes the weekday, staring with “1” for Monday.
Within the group Defrost (H81 –H85) one can adjust five start times valid for all days. This groups
is symbolized by the leading number “8” in the parameter number.
The programming is analogue to a mechanic timer switch, where a marker for switch-on and one
for switch-off times can be set daily. Note that there is no switching if the adjusted switch-on and
switch-off times of an output are the same on the same day. A cross-over of the time values of a
contact is possible, but the respective times then are ineffective.
Between 23:59 and 0:00 there is the special position “----“. With this setting the respective time is
deactivated and has no more influence on the according switching output. This setting is used to
allow outputs to be switched on for several days.

Third control level (all parameters):
Setting of control parameters
Access to the third control level is granted when selecting parameter PA on the second control
level. Parameter PA is to be set at '-19'. Then the key UP and DOWN have to be simultaneously
pressed for approx. 4 seconds which will give access to the third control level, beginning with
parameter P0. With the keys UP and DOWN you can scroll the list in both directions. Pressing the
SET key will give you the value of the respective parameter. By pressing the UP or DOWN key at
the same time the value can be adjusted.
Return to the initial position takes place automatically, if no key is pressed for 60 seconds, or by
simultaneously pressing the UP and DOWN key for approx. 4 seconds.
Para-
meter Function Adjustment range Standard setting Customer setting
P0 Indication of actual value of
sensor F1
P1 Calibration sensor F1,
actual value correction -99...+99 K 0.0 K
P2 Indication of actual value of
sensor F2
(only available if P4≠0)
P3 Calibration sensor F2,
actual value correction
(only available if P4≠0)
-99...+99 K 0.0 K
P4 Evaluation of sensor F2 0: not evaluated
1: evaluated as evaporator sensor
2: evaluated as actual value
thermostat 2
1
P5 Indication mode 0: integrals
1: accuracy 0,5 °C
2: accuracy 0,1 °C
1
P6 Display unit, indication in
standby mode 0: Fahrenheit (“AUS”) 1: Celsius (“AUS”)
2: Fahrenheit (“OFF”)
3: Celsius (“OFF”)
1
P7 Sensor type
(applies to both sensors) 11: Pt100 2-wire 21: PTC 2-wire
22: PT1000 2-wire
21
P8 Software filter
(applies to both sensors) 1: not active
2…32:
average value with 2…32
measuring values
8
P9 Weighing factor measuring
value (data record 1) 0..100 [%] 100
P9 Weighing factor measuring
value (data record 2) 0..100 [%] 100
r0 Hysteresis for the compressor
contact 1...15 K 2 K
r1 Setpoint limitation (minimum) -50 °C...r2 -50 °C
r2 Setpoint limitation (maximum)
r1...+150 °C 50 °C
c0 Start protection of the
compressor after "cooling on"
0...240 min. 0 min.
c1 Start protection after
compressor start 0...240 min. 5 min.

Para-
meter Function Adjustment range Standard setting Customer setting
c2 Start protection after
compressor stop 0...240 min. 3 min.
c3 Function in the case of error
of sensor F1
0: relay off
1: relay on
2: emergency operation
0
d0 Defrosting interval 0 = inactive, no defrosting
1...99 h 8 h
d1 Defrosting mode 0: electrical
1: with hot gas 0
d2 Defrosting temperature -50...+150 °C 10 °C
d3 Defrosting time limit 1...99 min. 30 min.
d6 Indication of the refrigerating
chamber temperature during
defrosting
0: actual temperature
1: temperature determined just
before the start of defrosting
1
d7 Drainage time 0...15 min. 2 min.
A0 Hysteresis for alarm 1...15 K 2 K
A1 Minimum limit value -99.0 ... -0.1 K
0 = inactive -10 K
A2 Maximum limit value +0.1...+99.0 K
0 = inactive 10 K
A3 Alarm suppression time after
“cooling on” 0...240 min. 120 min.
A6 Alarm suppression time after
temperature alarm 0...240 min. 2 min.
A7 Alarm suppression time after
defrosting 0...240 min 15 min.
A9 Switching sense alarm
contact 0: relay on 1: relay off 1
F4 Defrosting behaviour 0: ventilator off during defrosting
1: ventilator on during defrosting 1
F5 Ventilator delay after
defrosting 0...240 min. 2 min.
F7 Ventilator function at cooling
operation 1: always on 2: on or off together with the
compressor
3: on whenever the compressor is
on and sensor F2 < sensor F1
2
F8 Ventilator revolution number
(data record 1) at normal
cooling operation
0..100% 80
F9 Ventilator revolution number
(data record 1) at defrosting 0..100% 80
F10 Kick-start 0..60s 0
F11 Ventilator revolution number
(data record 2) at normal
cooling operation
0..100% 80
F12 Ventilator revolution number
(data record 2) at defrosting 0..100% 80
Y0 Indication mode of the actual
value of sensor F2 0: with parameter P2 1: with DOWN key 0
Y1 Setpoint thermostat 2
(only available if P4=2) -50...+150°C 10°C

Para-
meter Function Adjustment range Standard setting Customer setting
Y2 Hysteresis for thermostat 2
(only available if P4=2) 0,5...15 K 2 K
Y3 Setpoint limitation (minimum)
thermostat 2 -50°C...Y4 -50 °C
Y4 Setpoint limitation (maximum)
thermostat 2 Y3...150°C+50 °C
Y5 Switch mode thermostat 2 0: heating contact
1: cooling contact 1
Y6 Function in case of error of
sensor F2 0: relay off 1: relay on 1
Y7 Defrosting interval
thermostat 2 0: inactive, no defrosting 1...99 h 0
Y8 Defrosting time limit
thermostat 2 1...99 min 0: inactive 30 min.
b1 Function key 1
(if available) 0: no function 1: controller on/off (standby)
2: Setpoint ventilator revolution
number (F8/F11)
3: relay directly, switched off in
standby mode
4: relay directly, regardless of
standby mode
5: actual value sensor F2
6: switching data record 1 and 2;
after power-on data record 1 is
active
7: like 6, after power-on last data
record is active
8: Setpoint Y1
6
b2 Function key 2 see b1 0
b3 Function key 3 (standby) 0: no function
1: controller on/off (standby) 1
b4 Function key 4 (if available) TIME-key (in case of controllers
with RTC) or else like b1
b11 Function switching input E1
(if available) 0: no function 1: controller on/off (standby)
2: starting defrost
3: relay directly, switched off in
standby mode
4: relay directly, regardless of
standby mode
0
b12 Function switching input E2
(if available) see b11 0
b13 Function switching input E3
(if available) see b11 0
b14 Function switching input E4
(if available) see b11 0

Para-
meter Function Adjustment range Standard setting Customer setting
U1 Exit connection K1 0: no connection
1: connection to compressor
2: connection to defrost
3: connection to ventilator
4: connection to alarm
5: connection to thermostat 2
6: connection to function key 1,
E1 or E3
7: connection to function key 2,
E2 or E4
8: connection to buzzer
9: on, if controller on
10: on, if data record 2 is activated
(operates as timer switch)
1
U2 Exit connection K2 see U1 2
U3 Exit connection K3
(or internal buzzer, if
available)
see U1 3
U4 Exit connection K4
(if available) see U1 4
L0 Individual address 0 = inactive for Bus
1...255 0
L1 Amount of slaves
(if value > 0 the controller is
set as master automatically)
0...254 0
L2 Address of the first slave
(only relevant if L1>0) 2...255 2
Pro Program version

Parameter description:
The following values can change the equipment characteristics
and are therefore to be set with utmost care.
P0: Indication actual value of sensor F1
The here indicated temperature presents the sum of actual measured value of feeler F1 and the
actual value correction according to parameter P1.
P1: Calibration sensor F1, actual value correction
This parameter allows the correction of actual value deviations caused for example by sensor
tolerances or extremely long sensor lines. The regulation measure value is increased or decreased
by the here adjusted value.
P2: Indication actual value of sensor F2
The here indicated temperature presents the sum of actual measured value of sensor F2 and the
actual value correction according parameter P3.
P3: Calibration sensor F2, actual value correction
This parameter allows the correction of actual value deviations caused for example by sensor
tolerances or extremely long sensor lines. The regulation measure value is increased or decreased
by the here adjusted value.
P4: Evaluation of sensor F2
Sensor F2 can be used for the determination of the evaporator temperature (P4=1) or for the
second thermostat (P4=2).
If, in simpler refrigerant plants only the refrigerating chamber sensor is used, the feeler entrance for
sensor F2 as well as its data recording (P4=0) can be deactivated here. Among other, parameter
d2 has no meaning in the deactivated condition.
P5: Indication mode
The actual value can be indicated with different accuracy.
Actual values and parameter values are always set for highest accuracy.
P6: Display unit, indication in standby mode
This parameter allows display settings (°F or °C) and ("AUS" or "OFF") in standby mode.
P7: Sensor type
This parameter makes it is possible to adjust the feeler type of both sensors. Depending on the
hardware not all sensor settings are possible.
P8: Filter
This parameter can determine by how many measured values an average value is to be formed.
P9: Weighing factor for measuring value of refrigerating chamber sensor F1 (data record 1)
P10: Weighing factor for measuring value of refrigerating chamber sensor F1 (data record 2)
The actual value of the respective data record can be submitted to weighing. In this case the actual
value is formed by a mixing ratio of the measuring values of sensor F1 and F2. (new function of the
sensors as supply-air and exhaust-air sensor).
At standard setting [P9 = 100%] the actual value corresponds to the refrigerating chamber sensor.
As soon as parameter P9 differs from 100% the measuring values are submitted to weighing.
The actual value then is formed as followed:
Actual value = (P9 * measuring value F1 + (100 –P9) * measuring value F2) / 100%
F1 = refrigerating chamber sensor / supply air
F2 = evaporator sensor / exhaust air