Siemens ET 200S - Page 540

Response Times
D-2
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
D.2 Response Times for the ET 200S
Calculating the Response Time as of IM151-1 BASIC, 6ES7 151-1CA00-0AB0
The following formula enables you to make an approximate calculation of the
ET 200S response time:
Response time [s] = 156 · m +33 · do + 486 · ai + 374 · ao + 1633 · t + 934
Explanation of the Parameters:
 m: Total number of all modules (power modules, digital electronic modules,
analog electronic modules, IQ-SENSE electronic modules, process-related
modules, and motor starters)
 do: Sum of all the digital output modules
 ai: Sum of all the analog input modules and 1SSI fast electronic modules
 ao: Sum of all the analog output modules
 t: Number of all process-related modules (except 1SSI fast)
Example of the Calculation of the ET 200S Response Time as of IM151-1 BASIC
6ES7 151-1CA00-0AB0
IM151-1 BASIC
PM-E 24 VDC
2DI 24 VDC
4DO 24 VDC
2DI 24 VDC 4DI 24 VDC
2DO 24 VDC
PM-D
DS
DS DS
Bus terminator
2AI U
2AO I
Slot
1 2 345 6 789101112
m = 12; do=2; ai=1; ao=1; t=0
Response time = 156 · m +33 · do + 486 · ai + 374 · ao + 1633 · t + 934
Response time = 156 · 12 +33 · 2 + 486 · 1 + 374 · 1 + 1633 · 0 + 934
Response time = 3732 ms
Figure D-2 Example Setup for Calculating the Response Time in the Case of the IM151-1
BASIC