Monitoring Functions Of The Cpu 410-5H - Siemens CPU 410-5H Process Automation System Manual

3.2

Monitoring functions of the CPU 410-5H

Monitoring functions and error messages
The hardware of the CPU and operating system provide monitoring functions to ensure
proper operation and defined reactions to errors. Various errors may also trigger a reaction
in the user program.
The table below provides an overview of possible errors and their causes, and the
corresponding responses of the CPU.
Additional test and information functions are available in each CPU; they can be initiated in
STEP 7.
Type of error
Access error
Time error
Power supply module(s)
fault (not power failure)
Diagnostic interrupt
Swapping interrupt
Redundancy error interrupt
CPU hardware fault
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
Cause of error
Module failure (SM, FM, CP)
The user program execution time (OB 1 and all interrupts and
•
error OBs) exceeds the specified maximum cycle time.
OB request error
•
Overflow of the start information buffer
•
Time-of-day error interrupt
•
In the central or S7-400 expansion rack
at least one backup battery of the power supply module is
•
completely discharged.
the backup battery voltage is missing.
•
the 24 V supply to the power supply module has failed.
•
An I/O module with interrupt capability reports a diagnostic interrupt
The synchronization module signals a diagnostic interrupt; see
Chapter Synchronization modules for the CPU 410-5H (Page 181)
The LED EXTF lights up with the first incoming diagnostic interrupt
and goes out with the outgoing diagnostic interrupt. The LED does
not light up when only an outgoing diagnostic interrupt is reported.
Removal or insertion of an SM, and insertion of a wrong module
type.
Removing a synchronization module.
The LED EXTF does not light up when a correct module is
inserted.
Loss of redundancy on the CPUs
•
Standby-master changeover
•
Synchronization error
•
Error in a synchronization module
•
Cancellation of the update process
•
Comparison error (e.g., RAM, PIQ)
•
A memory error was detected and eliminated
•
Structure of the CPU 410-5H
3.2 Monitoring functions of the CPU 410-5H
Error LED
EXTF
INTF
EXTF
EXTF
EXTF
EXTF
REDF
INTF
35