Order no. 900340.012
V1.54
Page 20
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,
respectively, an alarm as specified in
will be
triggered. 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 temperature
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 temperature 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
acknowledged. This is to ensure, for example, that a
temperature alarm that occurred at night remains
present until the error is acknowledged the next day. If
the temperature 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.
Additionally, you can define if the buzzer is to sound
again after acknowledgement. The corresponding time
is indicated in
. The error message and the
temperature will be displayed alternately as long as the
alarm is present. If more than one alarm messages are
present, 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
parameterised 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 exceeded or if the signal is present for
more than 15 minutes. This fault will only be deleted
