5
VLT is a registered Danfoss trademark
Introduction
The Danfoss BACLink® is a microprocessor based communication
portal that provides seamless translation between BACnet and
Danfoss VLTs. The portal supports BACnet communications
through Ethernet, BACnet IP over Ethernet (often referred to as
Ethernet IP), ARCnet, EIA-485 (using MS/TP), or EIA-232 (PTP).
The BACLink portal provides a dedicated Ethernet port and two
serial communication ports which can be configured for different
protocols. Baud rates are software selectable. An optional EIA-485
4-wire connection is also available to extend network cable length
beyond 4000 feet.
Do not input multiple protocol formats to the portal at the same time
since this can cause a communications loop and generate
excessive electrical noise.
BACLink accesses the Johnson Controls Metasys®
N2 protocol
resident in the Danfoss VLT®
2800 and VLT® 6000 Adjustable
Frequency Drives. The BACLink port operates with an internal
ARCnet operating protocol. Recommended connection is through
EIA-485 compatible, half duplex, 9600 baud, shielded twisted-pair
wiring. Data points in the N2 database are classified as analog I/O
(floating point), binary I/O or integer data points. Each data type
has a unique structure defined in the Metasys N2 system
Protocol
Specification for Vendors.
An appendix at the back of this manual contains the drive point
maps for BACnet.
About this manual
The information in this manual is intended to provide
comprehensive information on installation and set up of the VLT for
communication over a BACnet network.
It is assumed that the user has knowledge of the capabilities of the
BACnet network in addition to an understanding of the Danfoss
VLT 2800 and VLT 6000 drives. For specific information on
operation of the drive, refer to the
Installation, Operation and
Maintenance Manual for the VLT 6000
or the
Operating
Instructions for the VLT 2800.
References
In addition to this manual, the following manuals may be
referenced:
Installation, Operation and Maintenance Manual for the
VLT
®
6000 Adjustable Frequency Drive
, Danfoss Graham
number 23-6108-00.
Operating Instructions for the
VLT
® 2800, Danfoss number
MG28Axxx
Johnson Controls Metasys
®
N2 System Protocol Specification
for Vendors
, Johnson Controls number 04-3402-22.
Trademarks
Metasys® N2 is a Johnson Controls Inc registered trademark.
VLT® is a Danfoss registered trademark.
