ABB LD 800HSE, Руководство пользователя

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Section 1 Introduction Features of the Linking Device
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Functionality in the H1 links:
• System Management Manager
• Network Management Manager
• Client for object access
• Publisher and Subscriber of process data
• Reception of alarms and events
• Link Master, SM Time Publisher
H1 Live List
The H1 live list contains all H1 devices which are active on the H1 link.
For each H1 device the linking device records the node address, the PD tag, and the
device ID.
Redundancy
The linking device supports device redundancy. In the redundant mode, a set of
two physical linking devices forms one logical linking device. One operates as
Primary Device the other as Secondary Device or Backup Device. Both devices of
a redundant set are connected to the same HSE subnet and to the same H1 links. If
the Primary Device fails, the Secondary Device automatically takes over the role of
the Primary Device to ensure continuous system operation. The failed physical
linking device can be replaced and the new device will further on act as Secondary
Device. The system is then again able to tolerate a failure in one of the two physical
linking devices.
A more detailed description of the redundancy concept is given in Appendix C,
Technical Reference .
Write access to the H1 NMA VFD of an H1 interface from an H1 link (e.g. by
means of an H1 configurator) is not supported.