Siemens SIMATIC C7-613, Руководство пользователя

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Operating the C7-613
5-19
C7-613 Control System
A5E00138934-03
Event Buffer
Fault and operational messages are entered in the event buffer of the C7-613. The
event buffer is a ring buffer and can contain up to 256 messages.
The event buffer is retained after a language change, a Reload application
operation, CPU restart, POWER OFF, and general reset.
The messages are entered in the buffer in their chronological order so that the
most recent message stands at the beginning.
The messages contain the following information:
•
Type of message (fault message or operational message)
•
Arriving (K) and Going (G) of the event
• Acknowledgement (Q) for fault messages
• Event number
• Name of message
• Time of the event
• Value of the four variables at the time of the event
Filing of messages in the event buffer in chronological order cannot be guaranteed
for messages that are pending or that arrived during STOP mode, power off,
parameter assignment, language changes, or while the event buffer is being
saved. Active fault messages are displayed after the mode is terminated or the
function is completed.
!
Caution
Messages that are pending just prior to POWER OFF may possibly not be stored
in the event buffer.
Reading Out the Number of Entries in the Event Buffer
You can obtain the number of entries in the event buffer with the “HMI API” FB.
When a fault message is displayed (parameter OBJ_TYPE=2), the level is output
using the “ADDINFO” parameter.