STORK TRONIC ST72-31.03 User manual

ST72-31.03
Temperature controller
Order number 900165.047
Wiring diagram
Product description
The switching exits of the thermal controller can be programmed as
-two-point controller with alarm contact
-three-point controller with alarm contact
-two-stage controller with alarm contact
-three-stage controller.
The setpoint and all parameters of the controller are set on a three-field plastic foil keyboard.
Range: dependent on type of sensor
Front size: 72mm x 72mm
Panel cut-out: 66.5mm x 66.5mm
Connector: plug and socket
Power supply: 230V∼
1

2

Software .03
Adjustment options
Key UP
Pressing this key you can increase the parameter or parameter value or scroll the parameter list.
Key DOWN
Pressing this key you can decrease the parameter or parameter value or scroll the parameter
list. At alarm the buzzer function can be switched off with this key.
Key 4: SET
While SET key is pressed, the setpoint is indicated.
In addition, the SET key is used for setting parameters
First control level:
Parameter setting of the control 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.
The setpoint S1’ (if available) can be adjusted in the same way. If setpoint S1’ is activated it is indicated and
relevant for the control in case of closed switching input.
Para-
meter
Function description
Adjustment range
Standard
setting
Custom
setting
S1
Setpoint
P4...P5
0.0°C
S1’
Setpoint at closed switching
input E1
-99...+99.9 K if A33=1
P4...P5, if A33=2
0.0°C/K

Second control level (P parameters):
Setting of control parameters
Simultaneously pressing the UP and DOWN key for at least 4 seconds opens a parameter list containing
control parameters.
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 60 seconds.
Para-
meter
Function description
Adjustment range
Standard
setting
Custom
setting
P1
Setpoint 2 or
DeltaW
P4...P5
-99...+999 K
10.0 °C
P2
Hysteresis contact K1
0.1... 99.0 K
1.0 K
P3
Hysteresis contact K2
0.1... 99.0 K
1.0 K
P4
Control range limitation – minimum
setpoint
-99°C...P5
-99°C
P5
Control range limitation – maximum
setpoint
P4...999°C
999°C
P6
Actual value correction
-10.0...+10.0 K
0.0 K
P19
Key-lock
0: no key-lock
1: key-lock
0
P30
Lower alarm value
-99...999°C/K
-10 °C
P31
Upper alarm value
-99...999°C/K
10 °C
P32
Hysteresis alarm circuit, one-sided
0.1...99.9 K
1.0 K

Parameter description:
P1: Setpoint / DeltaW for control circuit 2
Adjusting the setpoint of control circuit 2.
If A5=1, the setpoints for control circuit 1 and 2 are linked with one another via switching difference DeltaW,
which can be adjusted with P1. (operation with DeltaW)
The following applies: setpoint thermostat 2 = setpoint control circuit 1 + delta W2.
This difference can take positive or negative values. Thus, a leading or following contact can be realised.
P2: Hysteresis contact K1
P3: Hysteresis contact K2
The hysteresis can be set symmetrically or one-sided at the setpoint (see A40, A41).
At one-sided setting, the hysteresis works downward with heating contact and upward with cooling contact.
At symmetrical hysteresis, half of the hysteresis’ value is effective below and half of the value above the
switching point (see fig. 1 and 2).
Fig. 1: Heating controller, one-sided hysteresis Fig. 2: Cooling controller, symmetrical hysteresis
P4: Control range limitation – minimum setpoint
P5: Control range limitation – maximum setpoint
The adjustment range of the setpoint can be limited in both directions. This is to prevent the end user of a
unit from setting inadmissible or dangerous setpoints.
P6: 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.
P19: Key-lock
The key-lock allows blocking of the control keys. In locked condition parameter adjustments with keys is not
possible. At the attempt to adjust the parameters despite key-lock the message "===" appears in the display.
P30: Lower alarm value
P31: Upper alarm value
The exit alarm is a boundary alarm or a range alarm with symmetrical hysteresis (see P32). Both at the
boundary alarm and the range alarm, limit values can be relative, i.e. going along with the setpoint, or
absolute, i.e. independent of the setpoint. The operation mode is set with parameter A30. If, in case of
boundary alarm and only one switching point is required the not used second switching point should be
adjusted to a value above or below the operating range of the controller.

Boundary alarm function (see fig. 5):
The alarm contact is closed if the process
temperature is above the upper or below the lower
boundary value.
Fig. 5: Boundary alarm, rel. boundaries
Range alarm function (see fig. 6):
Opposite switching behaviour to the boundary
value alarm. The alarm contact is closed if the
actual value remains between the boundary
values.
Fig 6: Range alarm, abs. boundaries
P32: Hysteresis alarm circuit
Hysteresis is set symmetrical at the adjusted limit value, i.e. half of the hysteresis’ value is effective below
and half of the value above the switching point
Third control level, (A parameters):
Setting of control parameters
Access to the third control level is granted when selecting the last P-parameter on the second control level.
Continue to press the UP key for approximately 10 seconds until “PA” appears. Continue to press the UP
key and additionally press the DOWN key for about 4 seconds and the first A-parameter of the third control
level is indicated.
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 description
Adjustment range
Standard
setting
Custom
setting
A1
Switch mode contact K1
0: heating contact
1: cooling contact
0
A2
Switch mode contact K2
0: heating contact
1: cooling contact
1
A3
Function of contact K1 at
sensor error
0: relay off
1: relay on
0
A4
Function of contact K2 at
sensor error
0: relay off
1: relay on
0
A5
Selection setpoint 2 or DeltaW
0: operation with setpoint 2
1: operation with DeltaW
1
A8
Display mode
(all parameter indications are
presented in 0.1°K)
0: integrals, without leading zero
1: with decimals without leading zero
2: integrals, with leading zero
3: with decimals and leading zero
1
A9
Weighing factor
0.50 ... 2.50
1.00
A10
Indication value for lower
value linear analogue input
-99...999
0,0
A11
Indication value for upper
value linear analogue input
-99...999
100
A19
Parameter lock
0: no lock
1: A-parameter locked
2: A- and P-parameter locked
0

Para-
meter
Function description
Adjustment range
Standard
setting
Custom
setting
A30
Function alarm exit
0: Boundary alarm, relative
1: Boundary alarm, absolute
2: Range alarm, relative
3: Range alarm, absolute
0
A31
Special function at boundary
or range alarm
0: no special function
1: flashing display
0
A32
Setpoint display
0: display shows actual value
1: display shows setpoint S1 (S1‘)
0
A33
Type of setpoint S1‘
0: can not be activated
1: relative to setpoint S1
2: absolute (freely adjustable)
0
A34
Indication of setpoint change-
over
0: not active
1: flashing right point
0
A40
Hysteresis mode
contact K1
0: symmetrically
1: one-sided
0
A41
Hysteresis mode
contact K2
0: symmetrically
1: one-sided
0
A50
Minimum action time
contact K1 ”On”
0...400 sec.
0 sec.
A51
Minimum action time
contact K1 ”Off”
0...400 sec.
0 sec.
A52
Minimum action time
contact K2 ”On”
0...400 sec.
0 sec.
A53
Minimum action time
contact K2 ”Off”
0...400 sec.
0 sec.
A54
Delay after “Power-on”
0...400 sec.
0 sec.
A55
Mutual delay of contacts
K1 and K2
0...400 sec.
0 sec.
A56
Alarm delay after “Power-on”
or setpoint change-over
0...60 min
0 min.
A80
Temperature scale
0: Fahrenheit
1: Celsius
1
Pro
Show program version
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Parameter description:
The following values can change the equipment characteristics
and are therefore to be set with utmost care.
A1: Switch mode contact K1
A2: Switch mode contact K2
The switch mode for the relays, i.e. cooling or heating function, can be programmed independently at works.
Heating function means that the contact opens as soon as the setpoint is reached, thus power interruption.
At cooling function the contact closes, if the actual value is above the required setpoint. (see fig. 1 + 2)
A3: Function of contact K1 at sensor error
A4: Function of contact K2 at sensor error
At sensor error the selected relay falls back into the condition pre-set here. If there is a data-loss in
parameter memory (display indicates “EP”) both contacts K1 and K2 are switched off.
A5: Selection setpoint 2 or DeltaW
This parameter determines whether the setpoints for thermostat 1 and 2 independently adjustable (A5=0) or
whether they are tied with one another via a switching offset DeltaW (A5=1). This parameter applies only to
contact K2 (see parameter P1).
A8: Display mode
The value can be indicated in integrals or with decimals and if there is a leading zero. In general, all
parameter indications are presented with decimals.
A9: Weighing factor
With this parameter the actual value can be submitted to weighing. The measured value is multiplied by it
and both indicated in the display and applied for regulation.
A10: Indication value for lower value linear analogue input
A11: Indication value for upper value linear analogue input
Only relevant, if the controller is programmed for a voltage input (0…10V linear) or a current input (4…20mA
linear). These parameters allow scaling of the linear analogue input. The value to be indicated for the lower
and upper entrance value then defines the range the controller will indicate. For input range 4…20mA the
display will show sensor error if the input signal drops below 4mA.
A19: Parameter lock
This parameter enables locking of each parameter level. If third level is locked, only parameter A19 may be
changed.
A30: Function alarm exit
The alarm exit evaluates an upper and a lower limit value (see parameters P30 and P31), whereas a
selection is possible as to whether the alarm is active if the temperature lies within these two limits (range
alarm), or whether the alarm is released if the temperature lies beyond them (boundary alarm). In the case of
sensor error, the alarm is activated independently of this adjustment.
A31: Special function at boundary or range alarm
Here can be selected whether, in the case of an alarm, the indication to flash and/or the buzzer is to start.
Sensor alarm (display F1L or F1H) is indicated independently thereof by flashing display and the buzzer.
A32: Setpoint display
A32=0 indicates the actual value, A32=1 statically indicates the setpoint S1 or S1’ in the display. Therefore,
the current actual value can only be indicated with parameter P0.
A33: Adjustment of setpoint S1‘ (not available on all types of controllers)
By closing switching input E1, setpoint S1 can be switched to a setpoint S1’. Setpoint S1’ can be either
relative to setpoint S1 or an independent, freely adjustable, control setting.
The setpoint S1’ can only be accessed if input E1 is closed.

A40: Hysteresis mode contact K1
A41: Hysteresis mode contact K2
These parameters allow selection as to whether the hysteresis values which are adjustable with P32, are set
symmetrically or one-sided at the respective switching point. At symmetrical hysteresis, half of the hysteresis’
value is effective below and half of the value above the switching point. The one-sided hysteresis works
downward with heating contact and upward with cooling contact (see fig. 1 + 2).
A50: Minimum action time contact K1 ”On”
A51: Minimum action time contact K1 ”Off”
A52: Minimum action time contact K2 ”On”
A53: Minimum action time contact K2 ”Off”
These parameters permit a delay in switching on/off the relay in order to reduce the switching frequency. The
adjusted time sets the entire minimum time period for a switching-on or switching-off phase.
A54: Delay after “Power-on”
This parameter allows a switching-on delay of relays after switching-on the mains voltage. This delay
corresponds with the time set here.
A55: Mutual delay of contacts K1 and K2
This parameter makes a mutual switching-on delay of relays possible, depending on whichever contact is
switched first.
A56: Alarm Delay after “Power-on” or setpoint changeover
This parameter allows a delay of the alarm after switching-on the mains voltage or after a setpoint
changeover with switching input E1.
A80: Temperature scale
Indication can be switched between Fahrenheit and Celsius. At conversion, the parameters and setpoints
maintain their numerical value and adjustment range. (Example: A controller with the desired value of 0°C is
switched to Fahrenheit. The new desired value is then interpreted as 0°F, which corresponds to a
temperature of -18°C).
NOTE: Indication limits with °F can be smaller than the actual measuring range!
Status messages
Message
Cause
Error elimination
_ _ _
Key-lock active
Change parameter P19 or A19
F1L
Sensor error,
short-circuit at sensor F1
Check sensor
F1H
Sensor error,
open-circuit at sensor F1
Check sensor
display flashes
Temperature alarm at too high or too low
temperature (if activated) see A31
EP, display
flashes
Data loss at parameter memory
(Contacts are switched off)
If error cannot be eliminated by
switching on/off, the controller must be
repaired

Order No.: 900165.047
Technical data of ST72-31.03
Input
E1: external potential-free contact
Measuring input
F1: Temperature sensor, available types:
Pt100, 2-wire or 3-wire
Thermo element, type J or type K
Linear input 0-10V or 0-20mA
PTC
Measuring ranges: Pt100: -200°C...+840 °C
PTC: -50...145°C
Type J: -200...1200°C
Type K: -200...1200°C
Measuring accuracy of the controller: +/-0.5% of measuring range, max. +/-1K
Outputs
K1: Relay, change-over contact, 4A 250V (cosϕ=1)
K2: Relay, change-over contact, 4A 250V (cosϕ=1)
K3: Relay, normally-open contact, 4A 250V (cosϕ=1)
Display
One 3-digit LED-displays, height 13 mm, for temperature display, colour red
Three LEDs, for status display of the outputs K1, K2 and K3.
Power supply
230V 50/60Hz
Connectors
plug and socket
Ambient conditions:
Storage temperature: -20°C...+70°C
Operating temperature: 0...55°C
Relative humidity: max. 75%, without dew
Weight
ca. 330g
Enclosure
Front IP50, also available with IP63
Installation data
Unit is to be installed in an instrument panel.
Front size 72 x 72 mm
Panel cut-out 66.5 x 66.5 mm
Installation depth ca. 120 mm

Order No.: 900165.047
Selection of sensor type
ON 6 Connection
Pt100, 2-wire (standard setting)
Connection: clamp 11 and 13
Dip switch 4,5 and 6 in position ON
ON 6 Connection
Pt100, 3-wire
Connection: clamp 11, 12(correction) and 13
Dip switch 4 in position ON
ON 6 Connection
Thermo element type J (Fe-CuNi)
Connection: clamp 12 (+) and 13 (-)
Dip switch 2 in position ON
ON 6 Connection
Thermo element type K (NiCr-Ni)
Connection: clamp 12 (+) and 13 (-)
Dip switch 1 and 2 in position ON
ON 6 Connection
KTY81-121 (PTC)
Connection: clamp 11 and 13
Dip switch 1, 5 and 6 in position ON
ON 6 Connection
Current input 4...20 mA
Connection: clamp 12 (+) and 13 (-)
if FF20, DF17 sensor: clamp 14(+) und 12(-)
Dip switch 1, 2, 3 and 5 in position ON
ON 6 Connection
Voltage input 2...10 V
Connection: clamp 12 (+) and 13 (-)
Dip switch 1, 3 and 6 in position ON
ON 6 Connection
Current input 0...20 mA
Connection: clamp 12 (+) and 13 (-)
Dip switch 2, 3 and 5 in position ON
ON 6 Connection
Voltage input 0...10 V
Connection: clamp 12 (+) and 13 (-)
Dip switch 3 and 6 in position ON