Measuring probe signal via PLC interface

CNC – PLC

The status of the measuring probe signal is then transmitted to the CNC via the PLC interface; the CNC assumes edge evaluation and measured value detection. The task of the PLC is to read in the measuring probe signal and supply the signal to the PLC interface. See also [Axis control commands].

The measured value is the actual value at the time of occurrence of the probing signal.

Axis parameters

To activate this function, assign the value PLC to the axis parameter Measurement methods (P-AXIS-00516). Therefore, this parameter permits switchover only between probing signal detection modes via the drive or via probing signal detection via the PLC.

Notice

The accuracy of the measured values detected is dependent on the cycle time of the CNC and the PLC: The accuracy of the measured values detected in the drive is generally more precise since the position controller or the speed controller cycle time in the drive are used to evaluate the measured values.