ABB LD 800HSE, Руководство пользователя

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Appendix B Limits and Performance Data Performance
3BDD011677-600 A 99
Performance
H1 Slot Time
Duration of Redundancy Switch-over
During redundancy switch-over, the activity on H1 links is interrupted. From the
perspective of a single H1 device, publishing or subscribing a process value is
interrupted for a period of time that is composed of the following times:
• fault detection time t
fd
• redundancy switching time t
rs
• macro cycle duration t
mc
The time of inactivity due to redundancy switch-over for a single process value is
therefore:
• time of inactivity
≤
t
fd
+ t
rs
+ t
mc
compared to t
mc
during regular operation.
The fault detection time is:
• t
fd
≤
800 ms if the Primary Device fails.
• t
fd
≤
500 ms if the Ethernet connection on the Primary Device is removed.
1
Make sure that in your configuration the maximum number of 40 republished
signals per second per H1 link is not exceeded.
Please Note: Signals exchanged between H1 devices are not affected. This limit
only affects signals, which have a connection to LD 800HSE.
The H1 bus parameter “SlotTime” has to be less than 50. Otherwise, the
maximum time of inactivity on an H1 link would exceed 200 ms, which in turn
would have an impact on the fault detection time (i.e. a failure in an H1 channel
could not be detected within the currently used fault detection time).
Please note: Certain configurations of bus parameters (SlotTime,
MaxResponseDelay, MinInterPDUDelay) can reduce the possible maximum
numbers of republished signals per second and H1 link.