Order number: 900323.001 V1.74 Page 19
© Störk-Tronic 2021 • www.stoerk-tronic.com • Subject to modifications.
Parameter description
c-- Control circuit 1
c0 Assignment of cold store sensors
With this parameter, you can set which sen-
sor input is to be used as the cold room
sensor. The selected sensor must be set up
accordingly in the parameters.
c1 Control circuit 1: Setpoint (Set1)
c2 Circuit 1: Night-time incr./decr.
c3 Control circuit 1: Setpoint (Set2)
With this parameter, you can set the set-
point. It will be displayed directly if you press
the SET button and can be edited. The set-
ting range is defined by the set-tings in pa-
rameters c7 and c8. Setpoint c3 becomes
active if the Set2 function is switched on
via a button, a digital switching input, the
internal clock or the ST-bus. Setpoint c2 be-
comes active if the night-time increase/de-
crease function is switched on via a button,
a digital switching input, the internal clock or
the ST-Bus. The value of c2 is added to the
currently active setpoint c1 or c3.
c4 Control circuit 1: Switching mode
The switching mode of the control output
can be set to heating or refrigerating func-
tion. In the case of the heating function, the
control output is switched on if the actual
temperature is lower than the set tempera-
ture. In the case of the refrigerating function,
the output is on if the temperature is higher
than the setpoint.
c5 Control circuit 1: Hysteresis
In this parameter, you can specify the control
hysteresis. A small hysteresis enables exact
control, but will result in frequent switching
of the relay.
c6 Hysteresis mode
With this parameter you can define if the
hysteresis will be active at the correspond-
ing switching point symmetrically or on one
side only. In the case of a one-sided hyster-
esis, the hysteresis will be active below the
setpoint in the case of the heating function
[c4=0] and above the setpoint in the case
of the refrigerating function [c4=1]. In the
case of a symmetrical hysteresis, there is no
difference.
c7 Upper setpoint limit
c8 Lower setpoint limit
Setpoints c1 and c3 can only be set within
the limits defined here.
c10 Start protection after compressor
start
This protection time starts as soon as the
compressor is switched on. When the com-
pressor 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.
c11 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 excessive ac-
tivation and to increase the service life as a
consequence.
c12 Start protection compressor after
mains On
Activation of the control output is prevent-ed
after "Mains On" until this time has elapsed.
This function can be used, for example, to
avoid that several controllers are switched
on at the same, which would result in a high
load on the power supply network.
c15 On-time in emergency operation
c16 Cycle time in emergency operation
With these parameters, you can define how
the compressor is to behave in the case of
a sensor fault. In emergency operation, the
compressor is operated in a cycle of c16.
The on-time in c15 is a percentage of the
cycle time, with 100% meaning that the com-
pressor runs continuously and 0% meaning
that the compressor is off all the time. In
deep-freeze stores, the compressor should
continue operation in order to avoid defrost-
ing. In normal cold stores above 0°C contin-
ued operation might result in frost damage,
however. During emergency operation, no
defrosting will be performed.
c20 Assignment of sensors for "su-
per-frost" function
With this parameter, you can set which
sensor input is to be assigned to the "su-
per-frost" function. Depending on the sensor
design, it can also be used as core and/
or product temperature sensor. The selected
sensor must be set up accordingly in the H
parameters.
c21 "super-frost": lime limit,
"shock-frost", max. refrigerating pow-er
c22 "super-frost": temperature limit,
"shock-frost", max. refrigerating power
c23 "super-frost": deactivation,
"shock-frost", max. cooling power
If this function is activated, the lower warning
limit is deactivated and the compressor is
on permanently. In c23, you can define if
automatic shut-down is to be performed and
if this automatic shut-down is to be limited by
time only or by temperature, too. Limitation
by time is defined via c21, the temperature
condition is defined via c22.
c30 Assignment of sensor for humidity
control
With this parameter, you can set which sen-
sor input is to be assigned for the humidity.
If no sensor is assigned, the humidity con-
trol will be disabled. However, the function
c34 = 2 can be used to switch a relay via
the humidity function button. The selected
sensor must be set up accordingly in the H
parameters.
c31 Setpoint humidity (Set1)
c32 Setpoint offset humidity at night
c33 Setpoint humidity (Set2)
For c34>=2 and assigned sensor, the val-
ue set here is used for control. The value in
parameter c32 is added to c31 when night
mode is active.
c34 Humidity control mode
In the setting c34=1 only the evaporator fan
is set to continuous operation for humidifica-
tion. As a result, the humidity that forms on
the evaporator is transported back into the
cold room. The function is switched manual-
ly via the Humidity function (see b parame-
ter). In the setting c34=2, a relay is switched
for humidification, which distributes moisture
in the form of e.g. mist in the cold room.
If no sensor is specified, this relay can be
switched manually via the Humidity function
(see b parameter). In the setting c34=3 the
compressor is switched on for dehumidifica-
tion. So that the cold room does not get too
cold, a counter heating is switched accord-
ing to c37 and c38. If no sensor is speci-
fied, this function is deactivated.
c35 Hysteresis
In this parameter, you can specify the control
hysteresis. A small hysteresis enables exact
control, but will result in frequent switching
of the relay.
c36 Hysteresis mode humidity
With this parameter you can define if the hys-
teresis will be active at the corresponding
switching point symmetrically or on one side
only. A single-sided programmed hysteresis
is intended for a moistening [c34=2] below
and a dehumidification [c34=3] above the
setpoint. In the case of a symmetrical hyster-
esis, there is no difference.
c37 Switch-on point counter-heating
c38 Switch-off point counter-heating
In the dehumidification function [c34=3]
the compressor is activated in order to re-
duce the moisture in the cold store. A count-
er-heating can be activated, to avoid the
cooled from getting too cold. To do this, the
value in c37 is added to the current cold
store setpoint and if the value falls below
this calculated value, the counter heating
is switched on (see U parameters). At the
switch-off point c38 (relative, above c37),
the heating is switched off.
c39 Upper humidity setpoint limit
c40 Lower humidity setpoint limit
Setpoints c31 and c33 can only be set
within the limits defined here.
c99 Password for parameter level c--
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