6 Unidrive M700/M701 / Unidrive HS70/HS71 Control Getting Started Guide
Issue Number: 2
2Introduction
This guide covers the Unidrive M700/HS70 and Unidrive M701/HS71 products.
Unidrive M700/HS70 / Unidrive M701/HS71 features
• Analog and digital I/O with single channel SAFE TORQUE OFF input
• NV Media Card for parameter copying and data storage
• Universal high performance drive for induction, servo, permanent magnet and linear motors
• Flexibility with speed and position measurement, supporting multiple devices and all common
interfaces
• Ethernet fieldbus communication (Unidrive M700/HS70)
• Provides an equivalent for Unidrive SP (Unidrive M701/HS71)
• 485 serial communication interface (Unidrive M701/HS71)
2.1 Operating modes
The drive is designed to operate in any of the following modes:
1. Open loop mode
Open loop vector mode
Fixed V/F mode (V/Hz)
Quadratic V/F mode (V/Hz)
2. RFC - A
With position feedback sensor
Without position feedback sensor (Sensorless)
3. RFC - S
With position feedback sensor
Without position feedback sensor (Sensorless)
2.1.1 Open loop mode
The drive applies power to the motor at frequencies varied by the user. The motor speed is a result of
the output frequency of the drive and slip due to the mechanical load. The drive can improve the
speed control of the motor by applying slip compensation. The performance at low speed depends
on whether V/F mode or open loop vector mode is selected.
Open loop vector mode
The voltage applied to the motor is directly proportional to the frequency except at low speed where
the drive uses motor parameters to apply the correct voltage to keep the flux constant under varying
load conditions.
Typically 100 % torque is available down to 1 Hz for a 50 Hz motor.
Fixed V/F mode
The voltage applied to the motor is directly proportional to the frequency except at low speed where a
voltage boost is provided which is set by the user. This mode can be used for multi-motor
applications.
Typically 100 % torque is available down to 4 Hz for a 50 Hz motor.
Quadratic V/F mode
The voltage applied to the motor is directly proportional to the square of the frequency except at low
speed where a voltage boost is provided which is set by the user. This mode can be used for running
fan or pump applications with quadratic load characteristics or for multi-motor applications. This
mode is not suitable for applications requiring a high starting torque.
Unidrive M700_M701 Getting Started Guide English iss7.book Page 6 Friday, December 12, 2014 1:14 PM
To Next Page
Loading...
Need help?
General
