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Device Redundancy
The redundancy switching time is:
•
The macrocycle duration depends on the configuration and is usually in the range of
200 ms to 1000 ms.
Typical configurations with macro cycles of up to 1000 ms result in inactivity
periods (related to a single process value) between 1 and 2 seconds.
Figure 37
macro cycle duration (t
data will be lost. If the macro cycle duration is 500 ms (dotted lines), two cycles will
be lost.
Figure 37. Duration of Redundancy Switch-over
Device Redundancy
The following fault conditions cannot be detected in the linking device itself and
need to be covered at application level:
•
1. Fault detection time for loss of Ethernet connection reduced from 1500ms to 500ms with this version Product
version
1. Redundancy switching time reduced from 500ms to 300ms with this version Product version
100
≤ 300 ms.
1
t
rs
shows the situation for a switch-over time (t
mc
a loss of an H1 connection between the Primary Device and a subset of devices
on an H1 link
Appendix B Limits and Performance Data
) of 1000 ms. In that case typically one cycle of published
+ t
) of 1000 ms and a
fd
rs
3BDD011677-600 A
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