Operation
EP1918
36
Version: 1.1.0
Fig. 25: Worst case response time
It is assumed that a signal change takes place at the sensor, and that this is passed to the input. A
communication error occurs just at the moment when the signal is to be passed to the communication
interface. This is detected by the logic once the watchdog time of the communication link has elapsed. This
information should then be passed on to the output, resulting in a further communication error. This fault is
detected at the output once the watchdog time has elapsed, resulting in shutdown.
This results in the following formula for the worst-case response time:
max
Comm
Comm
Actuator
ReactionTime
WD
WD
RT
=
+
+
with
max
2 *15
20
50
ReactionTime
ms
ms
ms
=
+
=
Summary of Contents for EP1918
Page 2: ......
Page 30: ...Operation EP1918 30 Version 1 1 0 Fig 19 Creating alias devices by the user ...
Page 53: ...Appendix EP1918 53 Version 1 1 0 5 3 Certificates ...
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