Name: Siemens SIMATIC S7-300 Module data
Brand: Siemens
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Cycle and reaction times

5.3 Response time

CPU 31xC and CPU 31x, Technical data

5-14 Manual, Edition 08/2004, A5E00105475-05

5.3 Response time

5.3.1 Overview

Definition of response time

The response time is the time between the detection of an input signal and the change of a

linked output signal.

Fluctuation width

The physical response time lies between the shortest and the longest response time. You

must always reckon with the longest response time when configuring your system.

The shortest and longest response times are shown below, to give you an idea of the

fluctuation width of the response time.

Factors

The response time depends on the cycle time and following factors:

• Delay of the inputs and outputs of signal modules or integrated I/O.

• Additional update times for PROFINET IO

• additional DP cycle times on PROFIBUS DP

• Execution in the user program

Reference

• The delay times are located in the specifications of the signal modules

(

Module data

Reference Manual).

Update times for PROFINET IO

If you configured your PROFINET IO system in STEP 7, STEP 7 calculates the update time

for PROFINET IO. You can then view the PROFINET IO update times on your PG.

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