Siemens SIMATIC ET 200SP Manual page 23

Operating mode DI
3.2 Parameters/address space
Principle of pulse stretching
The figure below uses examples to show whether and how input pulses are changed.
Figure 3-3
22
Principle of pulse stretching
Digital input module DI 8x24VDC HS (6ES7131-6BF00-0DA0)
Equipment Manual, 11/2019, A5E35243810-AD