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.