Siemens SIMATIC S5 Manual page 286

Result of reaction When an input on the ET 200B-8DI sets an output on the ET 200U, the
time t typical reaction time is approx. 159 ms. The worst-case reaction time is
R
approx. 213 ms.
Fig. C-8 shows how the SINEC L2-DP field bus contributes to the reaction
time.
2.3 %
3.4 %
94.3 %
Figure C-8 Contribution of SINEC L2 DP to the reaction time
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
Reaction times in the ET 200 distributed I/O system
SINEC L2 DP
ET 200U
Application program
Typical reaction time t
R
Delay of
Worst-case reaction time t
3.4 %
2.7 %
93.9 %
R
C
C-19