Response Time - Siemens SIMATIC S7-300 Series Reference Manual
Cpu specifications
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- Manual (676 pages) ,
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Extending the Cycle Time
Note that the cycle time of a user program is extended by the following:
S Time-controlled interrupt handling
S process interrupt processing (also refer to Chapter 3.4)
S Diagnostics and error handling (see also Section 3.4)
S Communication via MPI
3.2
Response Time
Response Time – A Definition
The response time is the time between detection of an input signal and
modification of an associated output signal.
Factors
The response time depends on the cycle time and the following factors:
Factors
Delay of the inputs and outputs
Additional bus runtimes on the PROFIBUS
subnet
Range of Fluctuation
The actual response time lies between a shortest and a longest response time.
You must always reckon on the longest response time when configuring your
system.
The shortest and longest response times are considered below to let you get an
idea of the width of fluctuation of the response time.
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Remarks
The delay times are given in the technical specifications
S
In the Module Specifications Reference Manual for the
signal modules
S
In Chapter1.4.1 for the integrated I/O of the CPU 312
IFM.
S
In Chapter1.4.4 for the integrated inputs/outputs of the
CPU 314 IFM.
CPU 31x-2 DP only
Cycle and Reaction times
3-3
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