Alarm Messages - Siemens simatic hmi op27 Equipment Manual

Messages
6.1.2

Alarm Messages

Acknowledging
Alarm messages must be acknowledged because of their urgency and impor-
alarm messages 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.
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.
Message indicator
The message indicator does not go out until all the alarm messages have
departed. This means that a pending alarm message is not forgotten.
Acknowledgment During configuration, several alarm messages can be combined to so called
groups, group acknowledgment groups. This means that by acknowledging the first alarm e.g.
acknowledgement 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.
6-6
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Acknowledge an alarm message manually by pressing the system key
depicted on the right.
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.
ACK
OP27, OP37 Equipment Manual
Release 05/99