Siemens ET 200pro - Reaction Times at ET 200 Pro

Appendix
A.4 Response times
ET 200pro distributed I/O system
Operating Instructions, 03/2013, A5E00335544-08
507
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
Total of all electronic and pneumatic interface modules in the ET 200pro station
a
Total of all analog electronic modules in the ET 200pro station
Example of calculating the ET 200pro response time
Figure A-31 Example of calculating the response time for IM 154-2 DP High Feature
Response time = 55 ∙ 9 + 110 ∙ 3+190
Response time = 495 + 330+190
Response time = 1015 µs