Response times
D.3 Response times for the ET 200S
D.3
Response times for the ET 200S
D.3
Calculation of the response time for IM151-1 BASIC
The following equation enables you to make an approximate calculation of the ET 200S
response time:
Response time [μs] = 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
• do: Sum total of all digital output modules
• ai: Sum total of all analog input modules and 1SSI fast electronic modules
• ao: Sum total of all analog output modules
• t: Number of all technological modules (except 1SSI fast)
Example for calculating the ET 200S response time for IM151-1 BASIC
Figure D-2
Calculation method:
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 μs
D-2
electronic modules, 4 IQ-SENSE electronic modules, 4POTDIS potential distribution
module, RESERVE module, technological modules and motor starters)
Example set-up for calculating the response time for IM151-1 BASIC
Operating Instructions, 12/2005, A5E00515771-03
ET 200S