6-6
OP27,
OP37 Equipment Manual
Release 05/99
6.1.2 Alarm Messages
Alarm
messages must be acknowledged because of their ur
gency and impor
-
tance. This can be done manually or automatically by the PLC. Information on
the acknowledgment of alarm messages by the PLC is provided in the Commu
-
nication User
’
s Manual.
Acknowledge an alarm message manually by pressing the system key
depicted on the right.
ACK
Unacknowledged alarm messages flash in the alarm message line.
If several alarm messages are waiting to be displayed, the next alarm message
is displayed after one has been acknowledged. Each message must be acknowl
-
edge in turn.
The display of a message indicator can be enabled in the configuration.
As long as the symbol depicted on the right is displayed, at least one
alarm message waiting to be displayed on the OP
.
The message indicator does not go out until all the alarm messages have
departed. This means that a pending alarm message is not for
gotten.
During configuration, several alarm messages can be combined to so called
acknowledgment groups. This means that by acknowledging the first alarm
e.g.
cause of the malfunction) all the other alarm messages in the same acknowl
-
edgment group are acknowledged simultaneously (consequential malfunctions)
without them being issued in succession for acknowledgment on the OP (group
acknowledgement). Up to 16 acknowledgment groups can be configured.
If alarm messages are not assigned to an acknowledgment group, only the mes
-
sage currently displayed is acknowledged when more than one are waiting.
Acknowledging
alarm
messages
Message indicator
Acknowledgment
groups, group
acknowledgement
Messages
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