[8] Action related numbering
First of all the control
chain is numbered sequentially according to the principle. The
first actuator is given the supplementary number .0 and the
associated final control element the supplementary number .1. The
remaining elements get even numbers if they influence the advance
stroke and uneven numbers if they influence the return
stroke.
The numbering should always be entered in the circuit diagram and also on the machine to enable systematic fault-finding.