Response Times - Siemens SIMATIC ET 200SP F-AI 4xI 0(4) 20mA 2-/4-wire HF Series Manual

Response times

Introduction
You will find the response times of the F-AI 4xI 0(4)..20mA 2-/4-wire HF below. The
response times are included in the calculation of the F-system response time.
Definition of response time for fail-safe analog inputs
The response time results from the number of channels/channel pairs, the response time per
channel/channel pair, the basic response time and the configured smoothing.
Times required for the calculation
● Max. acknowledgment time (Device Acknowledgment Time): T
● Basic response time: 20 ms
● Response time per channel
– At 50 Hz: 25 ms
– At 60 Hz: 22 ms
Conversion cycle time = basic response time + (N × response time per channel)
(N = number of active channels)
The conversion cycle time is the time in which all activated channels are
processed/converted once.
Typical response time
You can calculate the typical response time of F-AI 4xI 0(4)..20mA 2-/4-wire HF using the
following formula:
Typical response time = Conversion cycle time × Smoothing
Max. response time (worst case delay time, WCDT)
You can calculate the maximum response time of F-AI 4xI 0(4)..20mA 2-/4-wire HF (worst
case delay time, WCDT) using the following formula:
Max. response time = 2 × Conversion cycle time × Smoothing
Analog input module F-AI 4xI 0(4)..20mA 2-/4-wire HF (6ES7136-6AA00-0CA1)
Manual, 08/2018, A5E41448857-AB
A
= 20 ms
DAT
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