Siemens SIMATIC ET 200SP Equipment Manual page 66

Response times
Introduction
The next section shows the response times of the digital input module F-DI 8×24VDC HF. The
response times of the digital input module F-DI 8×24VDC HF are included in the calculation of
the response time of the F-system. To do this, use the SIMATIC STEP7 response time table
(https://support.industry.siemens.com/cs/ww/en/view/93839056).
If you have configured the digital input module F-DI 8x24VDC HF (6ES7136-6BA00-0CA0) in
a plant, but have inserted the digital input module F-DI 8x24VDC HF (6ES7136-6BA01-
0CA0) instead, the information from the manual of the digital input module F-DI 8x24VDC
HF (6ES7136-6BA00-0CA0) still applies.
Definition of response time for fail-safe digital inputs
The response time represents the interval between a signal change at the digital input and
reliable availability of the safety frame on the backplane bus.
Times required for the calculation
• Maximum cycle time: T
• Max. acknowledgement time (device acknowledgement time): T
Maximum response time in an error-free scenario (worst case delay time, WCDT) for 1oo1
evaluation.
The following formula applies to a sensor supply without short-circuit test:
Maximum response time (T
The following formula applies to a sensor supply with short-circuit test:
Maximum response time (T
T1 = Time for short-circuit test
T2 = Startup time of sensor after short-circuit test
Digital input module F-DI 8x24VDC HF (6ES7136-6BA01-0CA0)
Equipment Manual, 10/2021, A5E50578307-AA
WARNING
cycle
WCDT
WCDT
= 8.0 ms
) = 2 * T + Input delay
cycle
) = 2 * T + Input delay + T1 + T2
cycle
A
= 16 ms
DAT
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