M580 Modbus Read_VAR

[haksarfarooq]

I'm trying to read modbus data from modbus slave using Read_VAR function. I'm getting an error that my device is not linked to a module.

I have a eH584040 module & eNOC0301.4 module that supports modbus, but neither of them are visible in the model family for some reason.

Thank you for your help

 

[modiconguy]

Post screenshots of the configuration, the code, and the error. Attach a ZEF or STA so someone else can have a look at it. I don't do redundancy CPUs or NOC modules but I've successfully used READ_VAR. My understanding is when you have remote IO scanning included in your processor, you'd want to configure that instead of READ_VAR, but I've never had luck with the IO scanning and I don't have any processors on hand that support it. You'd need to look at Schneider's resources.