Download 4 - Siemens

Controlling with the C7 CPU
3.8.1
Components of the Response Time with the C7-DP CPU as
DP Master
Response Times
within PROFIBUS
DP
Figure 3-5 shows the components of the response time in a PROFIBUS-DP
network. These times together produce the average response time which
elapses between a change in state on an input and the associated change in
state on an output:
3
C7-DP CPU as DP master
➁
➁
①
➂
➀ User program execution time in C7-DP CPU
➁ Response time of the DP slave
➂ Bus processing time
Figure 3-5
Description
➂
Response Times within the PROFIBUS-DP Network
Table 3-20 shows where you can find a description of the various
components of the response times.
Table 3-20
Components of the Response Time in the PROFIBUS-DP Network
No.
Component of Response Time
Description
➀
User program execution time in the
C7-DP CPU
See Sections 3.7 to 3.7.4
➁
Response time of the DP slave
In the documentation for the DP
slave
➂
Bus processing time
In this section
C7-626 / C7-626 DP Control Systems
C79000-G7076-C627-01
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