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Industry Automation and Control Forum
This forum is addressing industrial automation design & engineering, operations, asset performance, cyber security and digital transformation for Plants & Machines.
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Posted: 2025-04-27 02:17 AM . Last Modified: 2025-04-27 06:03 AM
Hi all,
Looking for advice how to set up HMIS5T as a slave and TM221C16R as a master on serial Modbus RTU.
Required to stop cycle and reset all timers down to 0 on M221 in case lost of serial communication between them.
For now HMIS5T as a master and M221 as a slave runs with no issues, after serial 485 cable unplugged the cycle executions continue. Was tried setup with Modbus slave RTU driver on HMI and M221 set as slave- no communication.
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Posted: 2025-05-03 10:53 AM
Well, will use your suggestion. Also my initial question still valid.
There screenshot of setup M221 when system frames not received from HMI.
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Posted: 2025-04-29 11:27 PM
I would suggest that you check instead these system words.
I did not test the function, but I would expect you could check in this way if the HMI is not present. Because in that case the number of messages will not change.
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Posted: 2025-05-05 09:48 PM
Your solution seems for me valid.
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Posted: 2025-05-06 11:09 PM
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Posted: 2025-05-08 12:31 AM
The HMI goes into error if serial unplugged any way. But M221 as a slave continue executing code. To prevent this my solution send M221 to stop all things due to serial communication issue. Physically only one I0.0 has M221 as a emergency stop button, reset of inputs are on HMI side.
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