Description::
After doing an overall reset of the CPU the "SF DP" LED lights.
As long as no PROFIBUS DP configuration has been loaded into the CPU the DP section of the CPU will not start.
Upon startup the operating system of the CPU initializes the "SF DP" LED. The diagnostics buffer of the CPU has no entry for this behavior.

Remedy:
Configure a DP master system for the CPU in the hardware configuration and load this configuration into the CPU.
As soon as a DP configuration is present in the CPU, the "SF DP" LED no longer lights.

Keywords:
Group error