IAC communication through microwave intermittent that make safety controller fault
We use IAC to communicate between 2 controller HI 865 by microwave. But the microwave is not stable, signal sometimes loss and I see one controller shutdown.
Please help us how to improve this case that means we don't want controller shutdown due to loss communication. Please see controller log
I 2016-06-08 02:10:54.321 ... flushed 3 messages (first message might be repeated)
I 2016-06-08 02:10:52.853 Scan_Task primary SM (1) restarted due to two CRC errors on outgoing telegrams
E 2016-06-08 02:10:52.949 ErrorHandler PM: 4180 MBM1 SM vs PM CRC32 fail ad 0x13 (1,2)
E 2016-06-08 02:10:52.951 ErrorHandler PM: 4180 MBM1 SM vs PM CRC32 fail ad 0x93 (1,3,ERS)
I 1979-12-31 00:00:00.000 Flushing modulebus frame discrepancy buffer:
E 1979-12-31 00:00:00.000 Modulebus frame discrepancy
Adress AccessType Ch16 (bin) Ch1 Unused To Fr Mi Ma Ci
PM: 103 WriteDigital 0000000000000000 00000000 13 00 00 0A 13
SM: 103 WriteDigital 0000000000011000 00000000 13 00 00 0A 13
Adress AccessType Ch16 (bin) Ch1 Unused To Fr Mi Ma Ci
PM: 903 WriteDigital 0000000000000000 00000000 93 00 00 0A 13
SM: 903 WriteDigital 0000000000011000 00000000 93 00 00 0A 13
Adress AccessType Ch16 (bin) Ch1 Unused To Fr Mi Ma Ci
PM: 103 WriteDigital 0000000000000000 00000000 13 00 00 0A 13
SM: 103 WriteDigital 0000000000011000 00000000 13 00 00 0A 13
This PM has been automatically restarted.
Reason:
- Manual shutdown was requested (Acknowledged)
So I think something was wrong that make channel 4 & 5 discrepancy between PM & SM
Please see logic and communication variable between S01 and S02.
Answers
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