Input Freeze

If the terminal is placed in the freeze state by Input Freeze via the process data in the control word, no further analog measured values are relayed to the internal filter. This function can be used if an excessive load is expected at the measurement input, e g. if a filling surge is expected in a weighing application, which would unnecessarily overload the filters due to the force. This would result in a certain amount of time elapsing until the filter had settled again. The user must determine for himself how long the input freeze is useful; the time control and decision on the input freeze must be implemented by the user in the PLC, it is not part of the device.

To activate, the control PDO Input Freeze must be set to "1". As long as Input Freeze is set to "1", no values are passed on in the data flow.

Exemplary use: If the measured value has changed by more than 5 % from the last cycle (cycle time 100 µs) or by a fixed value such as 10 g as an indication of a sudden load, Input Freeze is activated by a TOF module for 50 ms. The peak load is no longer acknowledged by the device. If the change in measured value and the time are optimally adjusted to the expected force surge, the device can measure the current analogue value without overshoot.