Siemens SIMATIC ET 200iSP User Manual

Calculating the reaction time of the ET 200iSP
The following formula allows an approximate calculation of the ET 200iSP response time with
the IM 152-1DP:
Response time [ms] = g + b × 0.065 ms
Explanation of the parameters:
• g: Basic value of the IM 152-1DP according to operating mode
• b: Sum of all input and output bytes of the electronic modules
Table A-11 The following assignment applies to the basic value of IM 152-1DP:
Operating mode Basic value (g)
*)
IM 152-1DP (no redundancy mode) 1.5 ms
Redundancy mode IM 152-1DP 2 ms
*)
The speci󹪝ed basic values only apply to cyclic data exchange. Acyclic activities (e.g. diagnostic
interrupts) are ignored.
Table A-12 The following table applies for determining all input and output bytes (I/O bytes) and as a
template for calculation:
Electronic modules Number of I/O bytes
*)
x number of
modules
Total I/O bytes
8 DI NAMUR with digital inputs 3 X =
8 DI NAMUR with counting Inputs 7 X =
4 DO / 2 DO Relay 2 X =
4 AI / 4 AO without HART 8 X =
8 x = 4 AI / 4 AO with HART 28 (max.) X =
WATCHDOG 2 X =
Total of all I/O bytes (b) =
*)
Only a partial spectrum, the input and output bytes of each electronic module must be added together.
Example for the calculation of the response time
ET 200iSP with the following con󹪝guration:
• IM 152-1DP (no redundancy mode)
• 3 modules 8 DI NAMUR with digital inputs
• 3 modules 4 DO
• 1 WATCHDOG module
Basic value = 1.5 ms
Sum of all I/O bytes = 3 × 3 + 2 × 3 + 2 × 1 = 9 + 6 + 2 = 17
Response time [ms] = 1.5 ms + 17 × 0.065 ms = 2.605 ms
Appendix
A.3 Reaction times
ET 200iSP
Operating Instructions, 11/2022, A5E00247483-AK 431

Siemens SIMATIC ET 200iSP Specifications

General

Brand	Siemens
Model	SIMATIC ET 200iSP
Category	I/O Systems
Language	English