Interrupts, error messages, diagnostics and system alarms
5.3 Alarms
Interface module IM 157-1 PN (6ES7157-1AB00-0AB0)
32
Manual, 12/2016, A5E32347036-AD
5.3.2
Maintenance events
Triggering of a maintenance event
The PROFINET IO interfaces of the interface module support the diagnostics concept and
maintenance concept in PROFINET IO according to standard IEC 61158-6-10. The goal is
the early recognition and correction of potential disruptions.
For the interface module, maintenance events signal to the user when a network component
must be checked or replaced.
The CPU interrupts user program execution and processes the diagnostic block OB 82. The
event that triggered the maintenance event is entered in the start information of the OB 82.
The interface module signals a maintenance event to the higher-level diagnostics system in
the case of the following event:
Table 5- 5
Triggering of a maintenance event
Maintenance alarm
Event
Alarm/Meaning
Maintenance demand-
ed
LED MAINT is lit.
Synchronization
loss
•
No synchronization frame received.
No synchronization message frame was received by
the sync master within the timeout period after pa-
rameter assignment or during operation.
•
Successive synchronization frames are located out-
side permitted limits (jitter).
System alarms in STEP 7 (TIA Portal)
The maintenance information is generated in STEP 7 (TIA Portal) V12 SP1 and higher with
the following system alarms:
●
Maintenance demanded - indicated for each port by a yellow wrench icon
in the
device view or in the hardware configuration.
You can find more information on this topic in the STEP 7 online help.
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