Siemens SIMATIC C7-613, Manual

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Operating the C7-613
5-20
C7-613 Control System
A5E00138934-03
Saving the Event Buffer to the DB
In order to save and perform further work on the event buffer, it can be stored (256
entries maximum) in a DB (EVENT_BUFFER) on the MMC. You can save with the
keyboard using a special screen or in the user program by means of a job request.
This requires the C7-613 to be in RUN mode and the “HMI API” FB and
“HMI_EVENT” FB to be called cyclically.
The following information is entered in the EVENT_BUFFER in chronological
order:
•
Event number
•
Status arriving (K), going (G), and acknowledged (Q)
• Value of the four variables at the time of the event
• Time of the event
The most recent event is positioned at the beginning of the EVENT_BUFFER.
The EVENT_BUFFER is not cleared when a new save operation is performed.
Starting from data word 0, entries of previous saves are overwritten when a new
save operation is performed. The end of the new save operation can be
recognized when at least four event buffer entries are assigned a 0. An event
buffer entry always consists of 12 values.
5.6.2 Acknowledging Fault Messages
Fault messages have to be acknowledged (refer to Section 4.6.1) either by using
the user program or by pressing ENTER.
On the C7-613, unacknowledged fault messages appear as flashing messages on
the display.
• If several fault messages are pending for display, the next fault message
appears as a flashing message on the display once the previous one has been
acknowledged. These also have to be acknowledged.
• If no more fault messages are pending for display, the C7-613 switches back to
the operator control level from which it branched to the message level in order
to display the fault message.