Priority of the MC_Stop FB

The HLI of the ISG-MCE has, per axis, precisely one commanding and acknowledgement interface for MC commands. The commanding and acknowledgement interface are each realised as a consumption data item. Accordingly, a maximum of one FB command can be issued in each PLC cycle. If a second FB is triggered in one PLC cycle, it cannot be asserted. If (within one PLC cycle) the next command is MC_Stop, the one already existing in the command memory is overwritten by this MC_Stop, and so MC_Stop always has the highest priority.