# Measurement parameter definition in the axis-specific machine data

If positions of an axis are to be detected by measurement processes, this option must be defined by parameters in the axis-specific machine data.

On the one hand, the possibility of detecting measured values for an axis must fundamentally be enabled. This is done by means of the entry:

kenngr.messachse 1

On the other hand, you must define where the source for the trigger signal that triggers measurement is. There are 4 different signal sources. In this context, it must be pointed out that only one of the signal sources can be defined at any one time as active and must therefore be assigned the value 1. All other alternatives must be assigned the value 0.

The following example shows the parameter definitions that must be used when using KUKA drives. With KUKA drives, the trigger signal is supplied by the drives and so this signal source is defined as active and the others as inactive.

kenngr.mess_signal_achs_steuer 0

kenngr.mess_signal_taster 0

kenngr.mess_signal_sercos 0

kenngr.meas_signal_drive 1