KGL Operating Manual – UA 412 S
2019-01-14
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computer. Therefore, it is recommended after any change of alarm priorities to the value 0 to
restart the controller or ensure that the adjusted alarms are not active at the time of the
adjustment.
If the case controller is used with store computers without extended priority allocation, the
priorities may only be allocated between 0..2 or "– " (see store computer operating manual for
priority allocation). In the case of incorrect parametrisation, the alarm signalling behaviour of
the store computer is undefined (particularly with regard to the assignment of priorities to
alarm destinations). This also applies for the refrigeration point priority.
11.3 Alarm paths
If an alarm state is detected, it is forwarded on the following paths by the case controller:
to the alarm relay floating contact changeover contact 15/16/18),
a local BT 300 x operator interface at the DISPLAY interface (if available),
via the CAN bus interface on a system centre / store computer / operator terminal in the E*LDS system
(if available).
11.4 End of an alarm
The condition for ending an alarm can be selected from 2 basic principles:
Automatic reset of all alarms after elimination of the cause
Manual reset of all alarms after elimination of the cause
The manual reset can be performed:
by switching off the controller. This is also possible if the alarm is still pending.
using a local BT 300 x operator interface at the DISPLAY interface,
via the CAN bus interface using a system centre / store computer / operator terminal in the E*LDS
system,
using the manual shutdown (digital input 230 V AC). This is also possible if the alarm is still pending.
11.5 Messages
States outside normal operatng conditions that, however, do not represent an alarm, are notified via the
interfaces and recorded in the message list.
Alarms with the priorities 0 / 10 / 20 /...90 are designated as messages. A list of the messages can be found in
the section
.
Individual allocation of priorities, page 116
Examples:
Power failure
Setpoint adjustment
Defrost end beyond the safe defrost time
11.5.1 Transient alarms and messages
Transient alarms are alarms for single events and are not provided with a send time stamp. Due to this
characteristic, transient alarms are not automatically deleted after the alarm event, instead they must always
be manually acknowledged. This also applies irrespective of the setting
(menu 6-2-3).
Selfholding
The following alarms are transient alarms:
