Siemens SIMATIC ET 200SP Manual page 94

Connecting
4.1 Pin assignment, sensor, load, and power wiring
Input noise filter for digital inputs
You can configure an input delay for each digital input to suppress interference. Signals must
have a steady state during the configured input delay before a signal is accepted as a valid
input state.
You can assign the following values for the input delay:
● Off (means input delay of 4 μs and requires a minimum pulse width of 3 μs)
● 0.05 ms
● 0.1 ms (default)
● 0.4 ms
● 0.8 ms
● 1.6 ms
● 3.2 ms
● 12.8 ms
● 20 ms
The input delay that you assign affects the detection time of input signals. The detected state
change is always offset in time by the assigned input delay time.
Note
For input delay settings of "Off" or "0.05 ms" and longer wire lengths, use shielded cables at
digital input connections. Shielding improves input response accuracy.
94
Technology module TM Pulse 2x24V (6ES7138‑6DB00‑0BB1)
Manual, 09/2015, A5E35061186-AA