Siemens ET 200S Manual page 541

Example of the Calculation of the Response Time as of the IM151-1 STANDARD,
6ES7 151-1AA01-0AB0, IM151-1 FO STANDARD
The following formula enables you to make an approximate calculation of the
ET 200S response time:
Response time [ms] = 55 · m +110 · a + 400 · t + 190
Explanation of the Parameters:
S m: Total number of all modules (power modules, digital electronic modules,
analog electronic modules, IQ-SENSE electronic modules, process-related
modules, and motor starters)
S a: Sum of all the analog electronic modules, 4 IQ-SENSE electronic modules,
and 1SSI fast electronic modules
S t: Number of all process-related modules (except 1SSI fast)
Note
The formula specified applies to cyclic data transfer. The following prerequisites
must be fulfilled:
S
No diagnoses are reported.
S
No modules are removed and inserted.
Example for the Calculation of the ET 200S Response Time as of the IM151-1
STANDARD, 6ES7 151-1AA01-0AB0, IM151-1 FO STANDARD
m = 21; a = 3;
Response time = 55 · m +110 · a + 400 · t + 190
Response time = 55 · 21 +110 · 3 + 400 · 1 + 190
Response time = 2075 ms
Figure D-3
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
1 2 3 4 5 6 7 8
t = 1
Example of the Calculation of the Response Time in the Case of the IM151-1
STANDARD, IM 151-1 FO STANDARD
Slot
9 10 11 12 13 14 15 16 17 18 19
Response Times
20 21
D-3