Siemens SIMATIC ET 200S - Response times for the ET 200 S

Response Times
D-2
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
D.2 Response times for the ET 200S
Calculation of response time with IM151-1 BASIC
The following formula enables you to make an approximate calculation of the
ET 200S response time:
Response time [ms] = 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 digital output modules
• ai: Sum of all analog input modules and 1SSI fast electronic modules
• ao: Sum of all analog output modules
• t: Number of all process-related modules (except 1SSI fast)
Example for calculation of the ET 200S response time in the case of the IM151-1
BASIC
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 78 9101112
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