The COM STAT LED is red: it may be a bus short circuit or a configuration error.
The APP STATION LED is orange, indicating that the CRC check value of the module does not match the one in the PLC.
Use PCB diagnosis: Connect the module through serial port or CIPconnect to view online diagnostic information. Checking whether the SLAVE CFG LIST and TRANSFER LIST match can quickly locate which slave station has not entered the data exchange state.
Check RSLogix status: Check the controller labels related to Status and Fieldbus in AOI. Confirm if the values of FB_Slave_Cfg_List and FB_Slave_xfer correspond.
Analyzing email message response: By sending email messages (such as Get Slave Diagnostics) and checking the returned Return Code and Fault Information, detailed error information at the slave level can be obtained. The list of error codes is defined in detail in the manual (such as 0x8010 indicating that the internal DPMC instance no longer exists).
