Remote Field Bus status commands - Metasys - LIT-12011034 - General System Information - Metasys System - Release 11.0

MS/TP Communications Bus Technical Bulletin

Brand
Metasys
Product name
Metasys System
Document type
Technical Bulletin
Document number
LIT-12011034
Version
Release 11.0
Revision date
2022-02-07
Language
English

The Site Management Portal UI offers a few commands that relate to Remote Field Bus operation.

Latch Statistics

The Latch Statistics command is redirected to the Metasys BACnet Device used for collecting MS/TP trunk statistics.

Clear Statistics

The Clear Statistics command is redirected to the Metasys BACnet Device used for collecting MS/TP trunk statistics. If the device used for collecting statistics changes after this command is issued, the new device is not cleared unless the command is issued again.

Sync Field Device Time(s)

The Sync Field Device Time(s) command sends a high-priority time synchronization command to all child BACnet Integration devices, based on each device mapper object's Manual Time Sync Type attribute.

If the Manual Time Sync Type is set to:

  • UTC: UTC time synchronization message is sent.

  • Local: A local time synchronization message is sent.

  • None: No message is sent.

  • Auto: The mapper object's Protocol Services Supported attribute is used to determine which type of time sync is supported, and if:

    • utcTimeSynchronization is set, the code functions as if Time Sync Type is set to UTC.
    • utcTimeSynchronization is not set and timeSynchronization is set, local time is set.
    • neither utcTimeSynchronization nor timeSynchronization is set, an error is returned.

Analyze Field Bus

The Analyze Field Bus option has been modified on a Remote Field Bus to use BACnet services that can pass through routers. (The local field bus operation can use MS/TP test messages, which do not pass through routers.) In addition, the bus can only detect remote devices that answer the wild card device instance value of 4194303. Some commonly used MS/TP devices do not respond to the wild card device instance value and are not detected by this operation. Devices already mapped are always displayed.

Note: Running a bus analysis remotely requires significantly more time to complete than what a local field bus requires, and adds significant message loading to the router while running.