Response times
Analog input module F-AI 4xI 0(4)..20mA 2-/4-wire HF (6ES7136-6AA00-0CA1)
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Manual, 08/2018, A5E41448857-AB
Response time in the case of a fault (one fault delay time, OFDT)
You can calculate the response time of F-AI 4xI 0(4)..20mA 2-/4-wire HF (one fault delay
time, OFDT) as follows:
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According to the following formula if a discrepancy error is present:
Typical response time = Conversion cycle time × Smo Discrepancy time +
Conversion cycle time
Maximum response time = 2 × Conversion cycle time × Smo Discrepancy time
+ 2 × Conversion cycle time
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According to the following formula if a channel fault is present:
Typical response time = Conversion cycle time
Max. response time = 2 × Conversion cycle time
This means that, for OFDT, the time on occurrence of a discrepancy error should be taken
with parameter assignment "1oo2 evaluation (max. SIL3/Kat.4/PLe)" and the time on
occurrence of a channel fault should be taken with parameter assignment "1oo1 evaluation
(max. SIL3/Kat.3/PLd)".
