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ABB REF542plus - Troubleshooting REF542 plus Issues; Error Messages and Solutions

ABB REF542plus
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REF 542plus switchbay protection and control unit
Manual Part 3: Installation and Commissioning
1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 55 / 80
RS232 to RS485 communication test
10 messages are sent to the RS 485 port.
Test result shown in the page (“TEST OK” or “TEST FAIL”)
2 seconds delay.
After finishing the test, the HMI test page will be displayed again automatically.

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