Siemens SIMATIC ST-1500 Function Manual page 109

Using the High_Speed_Counter technology object
3.5 Configuring the High_Speed_Counter
Input delay (Compact CPU)
You use this parameter to suppress interference at the digital inputs of the DIn signals.
Changes to the signal are only detected if they remain stable for longer than the configured
input delay time.
You can configure the input delay for a digital input of a Compact CPU in the Inspector
window of the device configuration under "Properties > DI 16/DQ 16 > Inputs > Channel n".
You can select from the following input delays:
● None
● 0.05 ms
● 0.1 ms
● 0.4 ms
● 1.6 ms
● 3.2 ms (default)
● 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.
Select level
You use this parameter to specify the level at which the digital input is active.
You can select from the following options:
Level
Active with high level
(default)
Active with low level
The parameter can be set for the following functions of a digital input:
● Gate start/stop (level-triggered)
● Enable synchronization at signal N
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Meaning
The respective digital input is active when it is set.
The respective digital input is active when it is not set.
Counting, measurement and position detection
Function Manual, 12/2017, A5E32009889-AG