I am attempting to retrieve modbus data from a modbus slave by utilizing the Read_VAR function. However, I am encountering an error stating that my device is not connected to a module. I have both an eH584040 module and an eNOC0301.4 module that are compatible with modbus, but for some unknown reason, they are not appearing in the model family. Any assistance you can provide would be greatly appreciated. Thank you.
Share screenshots of your configuration, code, and any errors you encounter. It is recommended to provide a ZEF or STA for assistance. While I do not work with redundancy CPUs or NOC modules, I have had success with using READ_VAR. Typically, if remote IO scanning is included in your processor, it is advised to configure that instead of using READ_VAR. However, I have not had success with IO scanning and do not have processors that support it. It is best to refer to Schneider's resources for further guidance.
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Answer: 1. Q: What could be causing the 'device not connected to a module' error when using the Read_VAR function for Modbus communication on the M580? The error could be due to compatibility issues or incorrect configuration settings. Ensure that the eH584040 and eNOC0301.4 modules are properly connected and configured for Modbus communication.
Answer: Check the physical connections of the modules, verify their compatibility with the M580, and ensure they are correctly recognized and configured in the system. Additionally, review the configuration settings for any possible discrepancies.
Answer: Yes, ensure that the Modbus settings such as baud rate, parity, data bits, and stop bits are correctly configured on both the M580 and the connected modules. Verify that the Modbus addressing and data mapping are set up accurately for seamless communication.
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