ABB LD 800HSE, Руководство пользователя

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Appendix C Technical Reference Fault Domain
3BDD011677-600 A 115
The following fault conditions cannot be detected and covered:
• a loss of an H1 connection between the Primary Device and a subset of devices
on an H1 link
• a loss of an H1 connection between the Secondary Device and the entire H1
link or a subset of devices on an H1 link.
The conditions for a switch-over from the Primary Device to the Secondary
Device are listed below.
Transfer from Primary Device to Secondary Device
The Primary Device transfers its role to the Secondary Device
The Secondary Device accepts the transfer
Only one of the listed faults may be present at a time. Another fault cannot be
tolerated until the redundant set has been repaired and a fully operational
Secondary Device is available.
if host system or configuration tool request to transfer the role
or the Primary Device detects a failure of its own Ethernet port
or the Primary Device detects a failure on at least one H1
interface
or the Primary Device detects a loss of the connection to all
devices on an H1 link.
(1)
(1) This requires that at least two devices have been connected to that H1 channel of the linking device and
have appeared in the H1 Live List before the loss of the connection occurs.
if its H1 interfaces are operational and faultless
and its Ethernet port is operational
and it has a valid configuration.