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7.7 BACnet
Building Automation and Control Network (BACnet) protocol was developed under
the auspices of the American Society of Heating, Refrigerating and Air-Conditioning
Engineers (ASHRAE) and is recognized as an American National, European, and
ISO global standard.
BACnet Device ID: All device IDs on a BACnet network must be unique. Refer to
the section Serial Protocols and refer to the Register List for additional information.
Serial: The serial version supports writable max_master, MS/TP address, max_
info_frames properties in the device object for MS/TP networks. For best network
performance, the max_master should be set to the highest MS/TP MAC address
on the network. The MS/TP address (object 1069) must be unique on the MS/TP
network. The max_info_frames does not need to be changed in most installations.
Ethernet: Ethernet versions can register as Foreign Devices to a BBMD. BBMD
stand for BACnet/IP Broadcast Management Device. The BBMD IP address can
be set from Power Meter Viewer Utilities or through character string object 2264.
A value of 0.0.0.0 disables foreign device registration. This process requires a
processor soft reset.
BACnet Structured View
The VerifEye
®
meter supports the Structured View (SV) object container. If this
option is supported in the BACnet exploring tool, objects will be grouped logically
into elements which can be named to reect electrical or physical locations,
followed by system objects, as shown below.
Within each element, Structured View lists the BACnet objects by Object Type
and then by numeric number as shown below. In addition objects for elements are
grouped in a “hotel room” scheme. That is Element A (and system objects) have a
range from 0-9999, Element B 10000-19999, Element C 20000-29999, to Element
P on the VerifEye
®
48 circuit meter 150000-15999. Some BACnet explorer tools
have additional sorting capabilities.
7 RTU PROGRAMMING AND SCRIPTING
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