Siemens simatic ET 200MP - C.4 Representation of the Analog Values of Resistance-Based Sensors;Resistance Thermometers

Response times
B.1 Response times of the ET 200MP
IM 155-5 PN HF Interface Module (6ES7155-5AA00-0AC0)
56 Manual, 10/2018, A5E32840985-AB
Example configuration for the calculation of the backplane bus cycle time
The following are used in the example:
Table B- 1 Example configuration for the calculation of the backplane bus cycle time
I/O module
Output data
in bytes
Input data
in bytes
Number of out-
put addresses
Number of
input address-
es
Analog output module AQ 4xU/I ST
8
-
1
-
Analog output module AQ 4xU/I ST with value
status
8 1 1 1
Digital output module DQ 32x24VDC/0.5A ST
with value status
4 4 1 1
Digital input module DI 32x24VDC HF
-
4
-
1
Analog input module AI 8xU/I/RTD/TC ST
-
16
-
1
Sum
20
25
3
4
Example calculation of the backplane bus cycle time
Backplane bus cycle time in μs:
● (20 + 3) x 0.0668 + 1.6131 = 3.1495 ≈ 4 μs (rounded up)
plus
● (25 + 4) x 0.0959 + 2.5901 = 5.3712 ≈ 6 μs (rounded up)
plus
● Operating system processing time 500 μs
Result of backplane bus cycle time
Backplane bus cycle time = 510 μs