Reaction Times Of Digital Input Modules; Reaction Times For The Digital Output Modules; Reaction Times For Analog Input Modules - Siemens SIMATIC ET 200iSP Operating Instructions Manual

Appendix
A.3 Reaction times
A.3.3

Reaction times of digital input modules

Input delay
The reaction times of the digital input modules depend on the input delay. See technical
specifications in section "Digital electronic modules (Page 295)"
A.3.4

Reaction times for the digital output modules

Output delay
The response times correspond to the output delay. See technical specifications in section
"Digital electronic modules (Page 295)".
A.3.5

Reaction times for analog input modules

Conversion time
The conversion time is made up of the basic conversion time and the processing time for
diagnostic wire-break monitoring (see technical specifications 4 AI RTD and 4 AI TC in section
"Analog electronic modules (Page 345)").
The integration time of integrating conversions has a direct influence on conversion times.
Cycle time
The analog/digital conversion and the transfer of the digitized measured values to memory or
to the backplane bus take place sequentially. In other words, the analog input channels are
converted one after the other. The cycle time, that is, the time until an analog output value is
converted again, is the sum of the conversion times of all the activated analog output channels
of the analog input modules. You should deactivate unused analog input channels during
parameter assignment in order to reduce the cycle time. The conversion and integration time for
a deactivated channel is 0.
The following figure provides you with an overview of what makes up the cycle time for an n-
channel analog input module.
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Operating Instructions, 11/2022, A5E00247483-AK
ET 200iSP