Alarm, error and system messages
9.2 PROFINET IO
ET 200pro distributed I/O system
Operating Instructions, 03/2013, A5E00335544-08
221
Maintenance alarms
Introduction
The PROFINET interfaces of IM154-4 PN High Feature (6ES7154-4AB10-0AB0) support the
diagnostic and maintenance concepts in PROFINET in accordance with IEC 61158-6-10.
The goal is early detection and correction of potential errors.
Maintenance interrupts with CM IM PN PP Cu connection module
The IM154-4 PN High Feature signals a maintenance interrupt to the higher-level diagnostics
unit when the following event occurs:
Loss of
synchronization
• No synchronization message frame received.
After parameter assignment or during
operation, the sync master did not receive a
synchronization message frame within the
timeout period.
• Successive synchronization message frames
lie outside the permitted limits (jitter).
MAINT lights up
The maintenance information is generated in
STEP 7
with the following system alarms:
● Maintenance required, identified by a yellow wrench per port.
Maintenance interrupts with CM IM PN PP FO connection module
For the IM154-4 PN High Feature, maintenance alarms signal to the user when a fiber-optic
cable must be checked or replaced. This depends on the increase of the attenuation value at
the PROFINET interface.
The IM154-4 PN High Feature signals the following to the higher-level diagnostics unit:
Level 1: Maintenance
required
After a system
reserve of 2 dB
1
The affected transmission link must be checked.
There remains a foreseeable period for replacing
the fiber-optic cable before a total failure occurs.
FO LED does not
light up
Level 2: Maintenance
demanded
After a system
reserve of 0 dB
The affected fiber-optic cable must be
immediately replaced to prevent total failure of the
PROFINET devices.
FO-LED is lit
1
These diagnostic messages are deleted automatically after 1 second.
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