Download TP 277, OP 277 (WinCC flexible) - Service, Support

Operating Alarms
9.2 Recognizing Pending Alarms
• SIMATIC diagnostic alarms
SIMATIC diagnostic alarms show states and events of the SIMATIC S7 or SIMOTION
• User-specific alarm classes
The properties of this alarm class must be defined in the configuration.
Further information on this may be available in your plant documentation.
Alarm Groups
The configuration engineer can group alarms into alarm groups. When you acknowledge an
individual alarm of an alarm group, you acknowledge all alarms which belong to the same
alarm group.
Alarm Buffer
The alarm events are stored in an internal buffer. The size of this alarm buffer depends on
the HMI device type.
Alarm Report
The configuration engineer can activate alarm logging on the project. In this case, alarm
events are output directly on the connected printer.
The configuration engineer can define whether each individual alarm is logged. An alarm of
this type is printed when the alarm events "Incoming" and "Outgoing" occur.
If you want to print alarms of the "System" alarm class, you have to print the contents of the
associated alarm buffer. For this case the configuration engineer has to configure an
operator control for printing the alarm buffer.
Alarm Log
Alarm events are stored in an alarm log, provided this log file is configured. The capacity of
the log file is limited by the storage medium and system limits.
Recognizing Pending Alarms
You can recognize the presence of alarms which must be acknowledged by the following:
• For an HMI device with keys: The LED in the
key is lit.
• Depending on the configuration: An alarm indicator is displayed on screen.
The configuration determines whether an alarm has to be acknowledged. This is also
defined by the alarm class which an alarm belongs to.
TP 277, OP 277 (WinCC flexible)
Operating Instructions, 09/2007, 6AV6691-1DH01-0AB0