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Siemens simatic ET 200MP Manual
Interrupts and diagnostic, error, and system alarms
5.3 Alarms
5.3.2

Maintenance events

Triggering of a maintenance event
The PROFINET interface of the interface module supports the diagnostic concept and
maintenance concept in PROFINET according to the IEC 61158-6-10 standard. The goal is
to detect and remove potential problems as soon as possible.
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 executes the diagnostic interrupt OB. The
event that triggered the maintenance event is entered in the start information of the
diagnostic interrupt OB.
The interface module signals a maintenance event to the higher-level diagnostic system in
case of the following events:
Table 5- 4
Triggering of a maintenance event
Maintenance alarm
Maintenance demanded
MAINT LED is lit
System alarms in STEP 7
The maintenance information is generated in STEP 7 with the following system alarms:
● Maintenance demanded - indicated for each port by a yellow wrench icon
device view or in the hardware configuration.
You can find additional information in the STEP 7 online help.
32
Event
Meaning
Synchronization
No synchronization frame received
•
loss
No synchronization frame was received by the sync master within the
timeout period after parameter assignment or during operation.
Successive synchronization frames are located outside permitted
•
limits (jitter)
Maintenance
The maintenance event of a power supply module is passed through.
event of an I/O
module
Interface module IM 155-5 PN ST (6ES7155-5AA01-0AB0)
Manual, 11/2017, A5E03612323-AC
in the