To Next Page

To Previous Page

Chapter 5 Parameters|VFD-M-D Series

5-34 Revision Jan. 2007, MDE2, SW V1.05

2 - 08 Torque Compensation Time Constant Unit: 0.01

Settings 0.01 ~10.00 sec Factory Setting: 0.05

2 - 09 Slip Compensation Time Constant Unit: 0.01

Settings 0.01 ~10.00 sec Factory Setting: 0.10

 Setting Pr.2-08 and Pr.2-09 changes the response time for the compensation.

 When Pr.2-08 and Pr.2-09 are set to 10.00 sec, its response time for the compensation will be

the longest. But if the settings are too short, unstable system may occur.

2 - 10

Compensation Coefficient for Motor Instability

Unit: 1

Settings 00~16 Factory Setting: 07

 The drift current will occur in a specific zone of the motor and it will make motor instable. By

using this parameter, it will improve this situation greatly.

 The drift current zone of the big horsepower motor is usually in the low frequency area. It is

recommended to set to 07.

2 - 11 PG Pulse Range Unit: 1

Settings 00 ~ 4000 Factory Setting: 600

 A Pulse Generator (PG) or encoder is used as a sensor that provides a feedback signal of the

motor speed. This parameter defines the number of pulses for each cycle of the PG control.

 The maximum pulse is 500kP/Sec and it supports two types, voltage output and open collector.

2 - 12 PG Input

Factory Setting: 00

Settings 00 Disable PG

01 Forward / Counterclockwise rotation

02 Reverse / Clockwise rotation

 The relationship between the motor rotation and PG input is illustrated below:

FWD

CCW

REV

PULSE

GENERATOR

2-12=01

2-12=02

A phase leads B phase

A phase

B phase

B phase leads A phase

Delta VFD-M-D series User Manual

Questions and Answers: