Error and system messages
4.2 Process interrupt lost
IM151-1 FO STANDARD interface module (6ES7151-1AB05-0AB0)
38 Manual, 02/2010, A5E01075965-03
4.2 Process interrupt lost
"Process interrupt lost" Diagnostics
Modules with a controller use the "Process interrupt lost" diagnostics.
The "Process interrupt lost" diagnostics are not currently available for the 2DI 24 V DC High
Feature and 4DI 24 V DC High Feature modules.
Note
Process interrupts should not be used for technological purposes (e.g. cyclical generation of
process interrupts).
If more than approximately 90 process interrupts are generated per second, process
interrupts may be lost.
4.3 Diagnostic messages of the electronic modules
Actions following a diagnostic message in DPV0 mode
The error is entered in the diagnostics frame in the channel-specific diagnostics:
● The SF LED of the interface module lights up.
● Several diagnostic messages can be output simultaneously.
● OB 82 is called. If OB82 is not available, the CPU goes into STOP.
Actions Following a Diagnostic Message in DPV1 mode
Each diagnostic message triggers the following actions:
● Diagnostics can be reported as diagnostic interrupts in DPV1 mode.
● A diagnostic message is
– Entered in the diagnostic frame as a diagnostic interrupt block (always limited to one
interrupt)
– Written to the diagnostic buffer of the CPU
● The SF LED of the interface module lights up.
● OB 82 is called. If OB82 is not available, the CPU goes into STOP.
● Acknowledgment of the diagnostic interrupt (thereafter a new interrupt is possible).
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