Siemens S7-1200 Programming Manualline page 62

3 General Programming
3.8 Process interrupts
Recommendation
Use the process interrupts in order to program fast responses to hardware
events.
If the system responses are not fast enough despite programming a process
interrupt, you can still accelerate the responses. Set as small an "Input delay"
as possible in the module. A response to an event can always only occur if the
input delay has lapsed. The input delay is used for filtering the input signal in
order to, for example, compensate faults such as contact bounce or chatter.
Figure 3-35: Setting input delay
Programming Guideline for S7-1200/1500
V1.2, Entry ID: 81318674
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