Hey,

I have an issue with SM 1231 AI (6ES7 231-4HF32-0XB0). Its connected to PLC s7-1200, TIA Portal says that everything is good - Module exists. In device configuration it has a green square on it showing thats everything is good, but I can't read anything from it and also the DIAG led is blinking with green light on a physical module. I checked the electrical connections, it seems good. Also, I can't see this module in ‘Local modules'. How to check the firmware version of this module with these informations on the module? What can I check?