Greenheck Vektor Laboratory Exhaust with VGN Technology Electrical Controls Information (476072) - Manual (Page 14)

The VGN Technology variable frequency drive (VFD)
has an embedded fieldbus as standard and optional
fieldbus adapter(s) that can be purchased. Greenheck
offers and supports BACnet® MS/TP as our standard
communication protocol and also LonWorks® as
an optional communication. The VFD does have
other languages available, but are not supported by
Greenheck, however, it may be supported by the VFD
manufacturer. Please contact the VFD factory support if
you have alternate communication requirements.
The following information is a guide to summarize
the set up of the VFD to a BMS system. The guide is
a general overview and it is suggested the controls
contractor and BMS group reference the VFD
manual for detailed installation and setup of the VFD
communications. It is also suggested to follow the
manufacturers recommendations for communication
cable type and maximum lead length. The
recommended cable is different for each protocol.
The following is only a general checklist and does not
specify exact parameters.
Communication
BACnet® MS/TP Protocol (standard)
Connect the communication wiring from the
appropriate VFD terminations to the BMS control
system. Reference the VFD manual for terminal
location and approved wiring type.
Apply power to the VFD.
Enable BACnet MS/TP as the desired Protocol.
Place the BACnet MS/TP channel in the reset
mode, this is required to set up all the remaining
parameters.
Define the system baud rate being used.
Define the Device object instance.
Define a unique object ID.
Confirm the communication.
Configure the device name.
Take the VFD out of reset mode.
Cycle power to the VFD to save all changes.
For a list of BMS points available for BACnet MS/TP
communication, see the manufacturer’s point listing
chart(s) in the manual.
NOTE
All parameters are to be modified at the bypass
keypad, which is the lower keypad on the enclosure.
LonWorks® Protocol (optional)
The LonWorks communication requires an optional
plug-in module that is added to the bypass module of
the VFD. The module needs to be specified at time of
ordering of the fan and control system.
It is also suggested to follow the manufacturers
recommendations for communication cable type and
maximum lead length for LonWorks. The recommended
cable is different for each protocol.
Verify mounting of plug-in module that nothing was
loosened in shipping.
Connect the communication wiring from the
appropriate VFD terminations to the BMS control
system. Reference the VFD manual for terminal
location and approved wiring type.
Apply power to the VFD.
Activate the field buss adaptor port.
Verify the HOST LED is lit to a solid green color.
Program the system enable control.
Program the bypass fault reset if required to reset
VFD from BMS.
Program the system VFD speed control.
Program the VFD fault reset if required to reset VFD
from BMS.
Cycle power to the VFD to save all changes.
For a list of BMS points available for LonWorks
communication, see the manufacturer’s point listing
chart(s) in the manual.
Electrical Controls Information for Factory-Supplied Variable Frequency Drive
14 VGN Technology
®