4
MG.10.P2.22
VLT is a registered Danfoss trade mark
This manual is intended to be used for both
instruction and reference. It only briefly
touches on the basics of the Modbus RTU
protocol whenever necessary to gain an
understanding of the Modbus RTU option card
for the VLT.
This manual is also intended to serve as a
guideline when you specify and optimize your
communication system. Even if you are an
Introduction
About This
Manual
What You
Should
Already Know
Assumptions
This manual provides comprehensive
instructions on the installation and set up of
the Modbus RTU option card for the VLT 5000
and VLT 6000 Adjustable Frequency Drives to
communicate over a Modbus network.
The VLT Modbus RTU option card is designed
to communicate with any controller that
supports the interfaces defined in this
document. It is assumed that you have full
knowledge of the capabilities and limitations of
the controller.
This manual assumes that you have a
controller that supports the interfaces in this
document and that all the requirements
stipulated in the controller, as well as the
VLT 5000/6000 Adjustable Frequency Drive,
are strictly observed, along with all limitations
therein.
experienced Modbus programmer, it is
suggested that you read this manual in its
entirety before you start programming since
important information can be found in all
sections.
For specific information on installation and
operation of the adjustable frequency drive,
refer to the
VLT Operating Instructions
.
