Siemens SIMATIC ET 200iSP

Principle of pulse stretching
The following 󹪝gure uses examples to show if and how input pulses are changed.
1BSBNFUFSGPSQVMTFTUSFUDIJOH5ݳ
1SPDFTTTJHOBM
QSPDFTTFE
JOQVUTJHOBM
1VMTFJTTIPSUFSUIBO5ݳBOEJT
FYUFOEFEUP5ݳ
1VMTFJTMPOHFSUIBO5ݳBOEJTOPU
DIBOHFE
1SPDFTTTJHOBM
QSPDFTTFE
JOQVUTJHOBM
5IFTFDPOEQVMTFPDDVSSJOHEVSJOHUIF
DVSSFOUQVMTFTUSFUDIJOHJTQPTUQPOFE
VOUJMUIFDVSSFOUQVMTFTUSFUDIJOHIBT
FYQJSFE
4IPSUQVMTFTUIBUPDDVSEVSJOHB
SVOOJOHQVMTFTUSFUDIJOHBSF
JHOPSFE
5ݳGPSFEHF
UP
5ݳGPSFEHF
UP
U
Figure 13-10 Principle of pulse stretching
Note
If you set a pulse extension for an input channel, this will also a󹪜ect the 󹪞utter monitoring that
you enabled for this channel. The "pulse-extended" signal is the input signal for the 󹪞utter
monitoring. You should therefore match the parameter settings for pulse extension, and 󹪞utter
monitoring to one another. By selecting the appropriate values for the parameters you can adjust
the functions optimally to your process.
Digital electronic modules
13.6 Description of the parameters of the digital electronic modules
ET 200iSP
340 Operating Instructions, 11/2022, A5E00247483-AK