Interrupt, error and system messages
9.2 PROFINET IO
ET 200M
Operating Instructions, 04/2022, EWA-4NEB7806006-09
217
Triggering a maintenance interrupt
The CPU interrupts processing of the user program and executes the OB 82 diagnostic block
instead. The event that triggered the interrupt is entered in the OB 82 start information.
9.2.4 Maintenance interrupts
Introduction
The PROFINET interfaces of the IM 153-4 PN support the diagnostic and maintenance concept
in PROFINET in accordance with IEC 61158-6-10. The goal is early detection and correction of
potential faults.
For the IM 153-4 PN, maintenance interrups signal the user when network components must
be checked or replaced.
Maintenance interrupts
The IM 153-4 PN signals a maintenance interrupt to the higher-level diagnostic system when
the following events occur:
Maintenance required
zation
• No synchronization frame received
After parameter assignment or during operation, the sync master did
not receive a synchronization frame within the timeout period.
• Jitter lies outside the limits
– The maximum permissible jitter has been exceeded during syn-
chronization.
–
A sync slave has been synchronized by the sync master again.
• Frames rejected
1
The integrated switch has rejected 3 frames due to network overload.
Maintenance demanded
• Frames rejected
1
The integrated switch has rejected 10 frames due to network overload.
1
These diagnostic messages are deleted automatically after 1 second.
System alarms in STEP 7
The maintenance information is generated in STEP 7 with the following system alarms:
• Maintenance required - symbolized by a yellow wrench for each port
• Maintenance demanded, symbolized by an orange wrench for each port
See also
Evaluating the interrupts of the ET 200M (Page 216)
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