Troubleshooting Guide
Checking Modbus RTU, RS485 communication
5 - 10 SKF Multilog On-Line System IMx-S
User Manual – Revision S
- M/S: Master or slave
- Number: slave ID
5. A properly working Modbus communication link should exhibit increasing
numbers of messages sent and received, without a significant increase in errors
or timeouts.
6. In case of significant errors or timeouts, check the following aspects:
- That the RS485 cable is correctly, physical connected
- Transmission characteristics are configured correctly
- The Modbus Master-Slave pair address is entered correctly
- RS485 termination is done correctly
7. This process of checking Modbus communication can be repeated, as required
during the installation/test to confirm communications activity or the lack of it.
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