Can you provide more context about what "Communication Abnormality" refers to in this error? What is the purpose of the backend-M7021-PLC machine code in this system, and what is the function of the KM-ASSYH2-04 error id?
The solution for a communication abnormality between backend-M7021-PLC and other devices may involve checking for hardware or software issues, ensuring proper wiring and connections, updating device drivers and firmware, or troubleshooting