INVT Goodrive35 Series User Manual

Goodrive35 Series Closed-loop Vector Control VFD Communication protocol
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A piece of data is two bytes, with the MSB on the left and LSB on the right. From the response, we
can see that the data in 0004H is 1388H, and that in 0005H is 0000H.
CRC check occupies two bytes, with the LSB on the left, and MSB on the right.
10.4.2 Command code: 06H, writing a word
This command is used by the master to write data to the VFD. One command can be used to write
only one piece of data. It is used to modify the parameters and operation mode of the VFD.
For example, to write 5000 (1388H) to 0004H of the VFD whose address is 02H, the structure of the
frame is described in the following table.
RTU master command (transmitted by the master to the VFD)
START
T1-T2-T3-T4 (transmission time of 3.5 bytes)
ADDR
02H
CMD
06H
MSB of data writing address
00H
LSB of data writing address
04H
MSB of to-be-written data
13H
LSB of to-be-written data
88H
LSB of CRC
C5H
MSB of CRC
6EH
END
T1-T2-T3-T4 (transmission time of 3.5 bytes)
RTU slave response (transmitted by the VFD to the master)
START
T1-T2-T3-T4 (transmission time of 3.5 bytes)
ADDR
02H
CMD
06H
MSB of data writing address
00H
LSB of data writing address
04H
MSB of to-be-written data
13H
LSB of to-be-written data
88H
LSB of CRC
C5H
MSB of CRC
6EH
END
T1-T2-T3-T4 (transmission time of 3.5 bytes)
Note: Section 10.2 and 10.3 mainly describe the command format, and the detailed application will be
mentioned in 10.4.8 with examples.
10.4.3 Command code: 08H, diagnosis
Sub-function code description
Sub-function Code
Description
0000
Return data based on query requests

INVT Goodrive35 Series Specifications

General

Protection Level	IP20
Power Range	0.75kW ~ 630kW
Control Mode	SVC
Overload Capacity	150% for 60 seconds, 180% for 10 seconds
Braking Unit	Built-in or external optional braking unit
Communication Protocol	Modbus
Protection Features	Overvoltage, Undervoltage, Overcurrent, Overload, Overtemperature, Short Circuit, Phase Loss
Ambient Temperature	-10°C to +50°C
Humidity	Less than 95% RH (non-condensing)
Altitude	Below 1000m (derating above 1000m)
Cooling Method	Forced air cooling

Summary

Chapter 1 Safety precautions

1.4 Safety guidelines

General rules and precautions for operating the VFD safely.

Chapter 2 Quick start-up

2.4 Environment

2.5 Installation confirmation

Checks to perform after the VFD has been physically installed.

2.6 Basic commission

Essential commissioning steps to perform before the VFD is put into actual operation.

Chapter 3 Product overview

3.3 Product specification

Details the technical specifications of the VFD across various functions.

3.6 Rated values

Lists electrical and performance ratings for different VFD models.

Chapter 4 Installation guide

4.2 Mechanical installation

Covers environmental requirements and installation methods for the VFD.

4.3 Standard wiring

Details the wiring diagrams for the main and control circuits of the VFD.

4.4 Standard wiring (control circuit)

Explains the wiring for various control circuit terminals and interfaces.

4.5 Wiring protection

Guidance on protecting the VFD and cables from electrical issues.

Chapter 5 Keypad operation procedures

5.2 Keypad

Details the VFD's keypad for control, data reading, and parameter modification.

5.3 Keypad displaying

5.4 Keypad operation

Instructions on how to navigate menus and modify VFD function codes.

Chapter 6 Function parameters

6.2 Goodrive35 general series function parameters

Detailed explanation of the VFD's function parameter groups and codes.

Chapter 7 Basic operation instruction

7.2 First powering on

Steps for initial power-up, checks, and VFD initialization.

7.3 Vector control

Explains the principles and application of vector control for asynchronous motors.

7.4 SVPWM control

7.5 Torque control

Covers the two control modes, torque and rotation speed control, and their implementation.

7.6 Parameters of the motor

Crucial motor parameters that need to be set for VFD operation and autotuning.

7.7 Start-up and stop control

Explains the different modes for starting and stopping the VFD.

7.8 Frequency setting

Describes various methods for setting the VFD's operating frequency.

Chapter 8 Fault tracking

8.3 How to reset

Methods for resetting VFD faults via keypad, digital input, or power cycling.

8.5 Fault instruction and solution

Steps to diagnose and resolve VFD faults, including tables of common faults.

8.6 Common fault analysis

Troubleshooting guides for common VFD issues like motor not working or vibration.

Chapter 9 Routine maintenance

9.2 Maintenance intervals

Lists recommended routine maintenance checks and their criteria.

Chapter 10 Communication protocol

10.2 Brief instruction to Modbus protocol

10.3 Application of the VFD

10.4 RTU command code and communication data illustration

Explains RTU frame formats, command codes, and data structure for communication.

10.5 Common communication fault