Error Diagnosis

PROFIBUS DP communication errors are generally indicated by the red “ERR” LED of the Communication Module. Malfunctions of the PROFIBUS driver or the Communication Module itself are additionally indicated via the E error flags and the corresponding LEDs of the CPU.

Furthermore, the PROFIBUS library provides different function blocks that allow a detailed error diagnosis. Amongst other things, the following information can be polled:

• The condition of the Communication Module itself
• A detailed PROFIBUS diagnosis of an individual slave or
• A system diagnosis overview.