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General Instructions
2 GENERAL INSTRUCTIONS
2.1 ABOUT THE MANUAL
The purpose of this manual is to provide the basic information needed to install, start-up in
the V/f control mode (scalar), and troubleshoot the most common problems of the CFW701
frequency inverter series.
ATTENTION!
The operation of this equipment requires installation instructions and detailed
operation provided in the user's manual, programming manual and manuals/
guides for kits and accessories. The user's manual and the parameters quick
reference are supplied in a hard copy together with the inverter. The user guides
are also provided in a hard copy along with the kit/accessories. The other
manuals are available at
www.weg.net
. A printed copy of the files available on
WEG’s website can be requested at your local WEG dealer.
Some of the figures and tables are available in the appendixes. The
APPENDIX B - TECHNICAL SPECIFICATIONS
shows the technical specifications. The information is available in three languages.
Please refer to the following technical manuals for further information:
CFW701 Programming Manual.
Modbus Communication Manual.
BACnet Communication Manual.
SoftPLC Manual.
2.2 ABOUT THE CFW701
The CFW701 frequency inverter is a high performance product designed for speed and torque
control of threephase induction motors. The main characteristic of this product is the “Vectrue”
technology, which has the following advantages:
Scalar control (V/f), V V W, or vector control programmable in the same product.
The vector control may be programmed as “sensorless” (which means standard motors
without using encoders).
The “sensorless” control allows high torque and fast response, even in very low speeds or
at the starting.
“Optimal Braking” function for the vector control, allowing the controlled braking of the motor
and avoiding external braking resistor for some applications.
“Self-Tuning” feature for vector control. It allows the automatic adjustment of the regulators
and control parameters from the identification (also automatic) of the motor parameters and
load.
