Order number: 900323.001 V1.74 Page 3
© Störk-Tronic 2021 • www.stoerk-tronic.com • Subject to modifications.
General information
GENERAL NOTES
The ST……112 controllers are designed for
general use in refrigerating plants.
Depending on the existing hardware, up to
four temperature sensors can be connect-
ed. These can either be used for captur-
ing 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 captur-
ing pressure levels, e.g. for condenser/fan
control, provided that the required hardware
is available.
The max. four digital inputs can also be con-
figured separately, depending on the hard-
ware 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 pa-
rameters. 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 in-
crease/decrease of setpoint, can be set and
started via parameters.
CONTROL KEYS
T1
1
2
3
45678910
T2 T3 T4 T5 T6
Key T1: UP
By pressing this key, the parameter
or parameter value is increased. A
further function of the key can be set with
parameter b1.
Key T2: DOWN
By pressing this key, the param-
eter or parameter value is de-
creased. A further function of the key can be
set with parameter b2.
Key T3: SET
While this key is pressed, the set-
point is indicated. The function of
the key can be set with parameter b3 (un-
changeable in this case)..
Key T5: function key
The function of the key can be set
with parameter b5.
Key T6: Standby
The function of the key can be set
with parameter b6. It is preset as
standby key. Thus the unit can be switched
on or off (no mains disconnection).
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 (set-
point 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.
If you press the STANDBY button during op-
eration (for at least 3 seconds), the cooling
controller is switched off and the message
AUS will be displayed. To switch on the
controller again, press the STANDBY button
again.
In addition to setting the temperature value,
the buttons UP and DOWN perform other
functions, too. Pressing the UP for 3 sec-
onds 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 acknowledg-
ing the buzzer sound.
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 af-
ter 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, in-
puts, 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 in-
fluence 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
ADR. will be displayed. Press UP or DOWN
to switch between code words PA and ADR.
All other settings / value specifications in
parameter setting mode are performed us-
ing the default value setting method, i.e.
pressing buttons SET and UP / DOWN at
the same time
.
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