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Cycle and Response Times
7-8
ET 200S Interface Module IM 151/CPU
A5E00058783-01
Longest Response Time
The following figure shows what the longest response time consists of.
Operating
system
User
program
PII
While the PII is being read in, the status of
the observed input changes. The change in
the input signal is no longer taken into
account in the PII.
PIQ
The change in the input signal is taken
account of in the PII here.
The change in the input signal is processed
by the user program here.
The response of the user program to the
input signal change is passed on to the
outputs here.
Response T
ime
Delay of the inputs
Delay of the outputs
Operating
system
User
program
PII
PIQ
Figure 7-3
Longest Response Time
Calculation
The (longest) response time consists of the following:
2
process image transfer time for the
2
process image transfer time for the o
2
operating system processing time +
2
program scanning time +
Processing time of the S7 timers
+
Delay of the inputs and outputs
This corresponds to the sum of the doubled cycle time and the delay of the inputs
and outputs.
Summary of Contents for SIMATIC IM 151/CPU
Page 6: ...Important Information vi ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 14: ...Contents xiv ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 42: ...ET 200S in the PROFIBUS Network 3 12 ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 68: ...Commissioning and Diagnostics 4 26 ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 98: ...Technical Specifications 6 8 ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 108: ...Cycle and Response Times 7 10 ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 190: ...Execution Times of the SFCs and SFBs C 4 ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 196: ...Migration of the IM 151 CPU D 6 ET 200S Interface Module IM 151 CPU A5E00058783 01 ...