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Operator control and monitoring
8.6 Events and messages
8.6.3
PCS 7 alarm signals in the WinCC alarm logging
Signaling of all process-relevant events
All process-relevant events can be signaled via a WinCC alarm, so that it is possible to use
the alarm log to track which events occurred and in what order, even after a length of time
has passed.
These alarms appear in WinCC, same as any other alarm in the PCS 7 alarm logging. When
the "Loop in Alarm" button is actuated, the picture containing the block icon of the Safety
Matrix that goes with the alarm is opened. Click this icon to open the faceplates of the Safety
Matrix Viewer.
Requirements for generating block icons
To generate the block icons for the Safety Matrix, the message blocks must be configured
appropriately and the Safety Matrix must be transferred with the "Position alarm blocks"
option selected:
● On the "Alarms" tab of the "Properties" dialog box for the Safety Matrix
(see section ""Properties" dialog box of the Safety Matrix (Page 74)")
● On the "Alarms" tab of the "Cause details" dialog box
(see section ""Cause details" dialog box - "Alarms" tab (Page 91)")
● On the "Alarms" tab of the "Effect details" dialog box
(see section ""Effect details" dialog box - "Alarms" tab (Page 99)")
● On the "Options" tab of the "Transfer to project" dialog box
(see section "Transferring the Safety Matrix to the project (Page 109)")
During OS compilation of the Safety Matrix, the corresponding block icons are generated for
the configured F_MA_AL (Safety Matrix, 1-time), F_SC_AL (causes, x-times), and F_SE_AL
(effects, x-times) message blocks. These icons offer different views. Specifically:
● View of the entire Safety Matrix
● View of an individual cause with associated intersections and effects
● View of an individual effect with associated intersections and causes
See also
Section ""Properties" dialog box of the Safety Matrix (Page 74)"
8.6.4
Alarms
Alarms of Safety Matrix
In online mode, the Safety Matrix displays alarms below the control bar in red text, e.g.:
● Transaction running
● Matrix is not being edited
● Communication error
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Safety Matrix
Configuration Manual, 02/2010, A5E00265325-03