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PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Cycle and Reaction times
Introduction
In this section, we explain what the cycle time and the response time of the S7-300
consist of.
You can use the programming device to read the cycle time of your user program
(see the STEP 7 online help system).
The example below shows you how to calculate the cycle time.
The response time is more important for the process. In this chapter we will show
you in detail how to calculate the response time.
In This Section
Section Contents Page
3.1 Cycle Time 3-2
3.2 Response Time 3-3
3.3 Calculation Example for Cycle Time and Response Time 3-10
3.4 Interrupt Response Time 3-14
3.5 Calculation Example for the Interrupt Response Time 3-16
3.6 Reproducibility for Delay and Watchdog Interrupt 3-16
Execution times
for the STEP 7 instructions processed by the CPU
for the SFCs/SFBs integrated in the CPUs
for IEC functions you can call in STEP 7
can be found in the S7300 Instruction List
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