INVT GD20-0R7G-4 User Manual

Goodrive20 inverters
Communication protocol
108
ASCII master command message (the command
sent by the master to the inverter)
ASCII slave response message (the message sent
by the inverter to the master)
Low bit of data content
‘A’
Low bit of data content
‘A’
‘B’ ‘B’
LRC CHK Hi ‘3’ LRC CHK Hi ‘3’
LRC CHK Lo ‘A’ LRC CHK Lo ‘A’
END Hi CR END Hi CR
END Lo LF END Lo LF
7.3.2.4 Command code: 10H, continuous writing function
Command code 10H means the master write data to the inverter, the number of data being written is
determined by the command “data number”, the max. number of continuous writing is 16 words.
For instance: Write 5000 (1388H) to 0004H of the inverter whose slave address is 02H, write 50 (0032H) to
0005H of the inverter whose slave address is 02H, then the structure of this frame is listed as below:
ASCII master command message (the command
sent by the master to the inverter)
ASCII slave response message (the message sent
by the inverter to the master)
START ‘:’ START ‘:’
ADDR
‘0’
ADDR
‘0’
‘2’ ‘2’
CMD
‘1’
CMD
‘1’
‘0’ ‘0’
High bit of starting address
‘0’
High bit of starting address
‘0’
‘0’ ‘0’
Low bit of starting address
‘0’
Low bit of starting address
‘0’
‘4’ ‘4’
High bit of data number
‘0’
High bit of data number
‘0’
‘0’ ‘0’
Low bit of data number
‘0’
Low bit of data number
‘0’
‘2’ ‘2’
Byte number
‘0’ LRC CHK Hi ‘E’
‘4’ LRC CHK Lo ‘8’
High bit of data 0004H
content
‘1’ END Hi CR
‘3’ END Lo LF
Low bit of data 0004H
content
‘8’
‘8’
High bit of data 0005H
content
‘0’
‘0’
Low bit of data 0005H
content
‘3’
‘2’

INVT GD20-0R7G-4 Specifications

General

Model	GD20-0R7G-4
Enclosure Rating	IP20
Output Voltage	0-Input Voltage
Control Method	V/F control, sensorless vector control
Overload Capacity	150% for 60 seconds
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overload, Overheat, Short Circuit, Phase Loss
Communication Interface	Modbus RTU
Rated Power	0.75 kW
Input Voltage	3-phase 380-480V AC
Input Frequency	50/60Hz
Cooling Method	Fan cooling

Summary

Safety Precautions

1.1 Safety definition

Defines hazard levels like Danger, Warning, and Note.

1.2 Warning symbols

Explains the meaning of various safety symbols used in the manual.

1.3 Safety guidelines

Provides essential safety rules for operating the inverter.

1.3.1 Delivery and installation

Covers safe practices for handling and installing the inverter.

1.3.2 Commissioning and running

Outlines procedures for starting and operating the inverter safely.

Product Overview

2.1 Quick start-up

2.2 Product specification

Installation Guidelines

3.1 Mechanical installation

Covers environmental requirements and physical mounting of the inverter.

3.2 Standard wiring

Details the connection diagrams for main and control circuits.

Keypad Operation Procedure

4.1 Keypad introduction

Introduces the inverter's keypad and its functions.

4.2 Keypad displaying

4.3 Keypad operation

Fault Tracking

6.1 Maintenance intervals

Lists recommended maintenance checks and intervals for the inverter.

6.2 Fault solution

Provides guidance on identifying, troubleshooting, and resolving inverter faults.

Communication Protocol

7.1 Brief instruction to Modbus protocol

7.2 Application of the inverter

7.3 Command code and communication data illustration

7.5 Example of writing and reading

Appendix A Technical Data

A.1 Ratings

A.3 EMC regulations

Appendix C Peripheral Options and Parts

C.7 Braking components