Siemens SIMATIC ST-1500 Function Manual page 108

Note
For High_Speed_Counter as of V3.0, the following applies:
You can choose the "Capture" function only in operating mode "Use count value as
reference".
Input delay (TM Count and TM PosInput)
You use this parameter to suppress signal interference at the digital inputs. Changes to the
signal are only detected if they remain stable for longer than the configured input delay time.
You can select from the following input delays:
● None
● 0.05 ms
● 0.1 ms (default)
● 0.4 ms
● 0.8 ms
● 1.6 ms
● 3.2 ms
● 12.8 ms
● 20 ms
Note
If you select the "None" or "0.05 ms" option, you have to use shielded cables for connection
of the digital inputs.
Note
You configure the input delay under "Behavior of DI0" for all digital inputs together. The input
delay is also displayed under "Behavior of DI1".
Counting, measurement and position detection
Function Manual, 12/2017, A5E32009889-AG
Using the High_Speed_Counter technology object
3.5 Configuring the High_Speed_Counter
107