Touch Probe (capture) With this function, the sensor position can be recorded and noted automatically if a level change occurs at the digital input of the home switch or at two other inputs. The position is recorded internally by the controller independent of the cycle time of the application or PLC. In object 3241h, you determine for each of the three inputs the source (in absolute user units or in sensor increments) and the time at which the position is recorded: on rising edge on falling edge on both edges