Siemens SIMATIC ET 200SP Equipment Manual page 68

x = Sensor supply
T1x = Time for short-circuit test
T2x = Startup time of sensor after short-circuit test
n = Number of sensor supplies with activated short-circuit test
The following section provides two examples for the calculation of the maximum response
time to external short-circuits at an F-DI 8×24VDC HF, depending on the parameter
assignment.
Channe Input delay Short-circuit
l (ms) test
0 3.2 Enable
1 3.2 Enable
2 3.2 Enable
3 3.2 Enable
4 3.2 Enable
5 3.2 Enable
6 3.2 Enable
7 3.2 Enable
Example calculation: (4.2 ms + 4.2 ms) >= 8.0 ms→ Ts = max (4.2 ms, 8.0 ms) + 4.2 ms =
12.2 ms
Chann Input delay Short-circuit
el (ms) test
0 0.4 Enable
1 0.8 Enable
2 1.6 Enable
3 3.2 Enable
4 0.4 Disable
5 0.8 Enable
6 1.6 Enable
7 3.2 Enable
*) External short-circuits are not detected with a deactivated short-circuit test.
Example calculation channel 1: (4.2 ms +10 ms) >= 8.0 ms → Ts = max (4.2 ms, 8.0 ms) +
10 ms = 18.0 ms
Digital input module F-DI 8x24VDC HF (6ES7136-6BA01-0CA0)
Equipment Manual, 10/2021, A5E50578307-AA
T1 T2 T
cycle
(ms) (ms) (ms)
4.2 4.2 8.0
4.2 4.2 8.0
4.2 4.2 8.0
4.2 4.2 8.0
4.2 4.2 8.0
4.2 4.2 8.0
4.2 4.2 8.0
4.2 4.2 8.0
T1 T2 T
cycle
(ms) (ms) (ms)
0.5 0.5 8.0
4.2 10 8.0
20 4.2 8.0
100 100 8.0
- - 8.0
4.2 4.2 8.0
500 500 8.0
2000 2000 8.0
T1 + T2 < Ts (ms)
T
cycle
NO 12.2
NO 12.2
NO 12.2
NO 12.2
NO 12.2
NO 12.2
NO 12.2
NO 12.2
T1 + T2 < Ts (ms)
T
cycle
YES 8.0
NO 18.0
NO 24.2
NO 200
- -
NO 12.2
NO 1000
NO 4000
Response times
Max. response time to
external short-circuits
(ms)
172.8
172.8
172.8
172.8
172.8
172.8
172.8
172.8
Max. response time to
external short-circuits
(ms)
5334.8
5335.2
5336.0
5337.6
- *)
5335.2
5336.0
5337.6
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