Reaction Times At Et 200Pro - Siemens ET 200pro Operating Instructions Manual

A.4.3

Reaction times at ET 200pro

Rules
The response time of ET 200pro is determined by
● The number of modules
● The number of diagnostic messages
● Removal and insertion of modules
● Interrupts
Calculating the response time
The equation below can be used to calculate the approximate response time of ET 200pro:
Response time [µs] = 55 ∙ m + 110 ∙ a + 190
m
a
Example of calculating the ET 200pro response time
Figure A-31
Response time = 55 ∙ 9 + 110 ∙ 3+190
Response time = 495 + 330+190
Response time = 1015 µs
ET 200pro distributed I/O system
Operating Instructions, 03/2013, A5E00335544-08
Total of all electronic and pneumatic interface modules in the ET 200pro station
Total of all analog electronic modules in the ET 200pro station
Example of calculating the response time for IM 154-2 DP High Feature
Appendix
A.4 Response times
507