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INVT Goodrive270 Series User Manual

INVT Goodrive270 Series
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Goodrive270 series VFD for fan and pump Communication protocol
-295-
9.3.1.2 Application to multiple VFDs
In practical application to multiple VFDs, chrysanthemum connection and star connection are
commonly used.
According to the RS485 industrial bus standards, all devices need to be connected in chrysanthemum
mode with one 120 Ω terminal resistor on each end, as shown in Figure 9-2. Figure 9-3 is the
simplified wiring diagram, and Figure 9-4 is the practical application diagram.
1# 2
#
3 # 4 # 32 #
120Ω
120Ω
Figure 9-2 Onsite chrysanthemum connection
1# 2# 3# 31#Master
A+
B-
A+ B-
Figure 9-3 Simplified chrysanthemum connection
INVT
VFD
Address 1
Earth
485+
485-
485+
485-
485+
485-
120Ω
Terminal resistor
PC
Converter
GND
RS232-RS485
Max. length of the
cable: 15 m
Shielded twisted pair
Address 2 Address N
INVT
VFD
INVT
VFD
Earth Earth
Figure 9-4 Practical chrysanthemum connection application
Figure 9-5 shows the start connection diagram. When this connection mode is adopted, the two
devices that are farthest away from each other on the line must be connected with a terminal resistor
(the two devices are devices #1 and #15).

Table of Contents

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INVT Goodrive270 Series Specifications

General IconGeneral
Control ModeV/F control, Sensorless vector control
IP RatingIP20
Cooling MethodAir cooling
Overload Capacity150% for 60 seconds
Protection FunctionsOvercurrent, Overvoltage, Undervoltage, Overheat, Overload, Short circuit
CommunicationRS485, Modbus
ApplicationWater pump
Input Frequency50Hz/60Hz
Output Voltage0~Rated Voltage
Rated CurrentDepends on the model
Operating Temperature-10°C to +40°C
Storage Temperature-20°C to 60°C
Humidity<95% (non-condensing)
AltitudeBelow 1000m

Summary

Change History

Preface

Safety Precautions

Safety Definitions and Warnings

Defines safety terms (Danger, Warning, Note) and lists warning symbols.

General Safety Guidelines

Covers essential precautions for handling, installation, operation, and maintenance.

Quick Startup Guide

Product Inspection and Environment Checks

Details unpacking, pre-use checks, and environmental requirements for VFD installation.

Basic Commissioning Steps

Outlines fundamental steps for initial VFD setup, motor parameter configuration, and autotuning.

Product Overview

Working Principles and Specifications

Explains the VFD's basic principles, technical specifications, and features.

Model Designation and Ratings

Details the VFD model designation code and product ratings for various power outputs.

VFD Structure and Components

Illustrates the physical structure and identifies the main components of the VFD.

Installation Guidelines

Mechanical Installation

Covers environment, direction, mounting methods, clearances, and cabinet installation.

Wiring Guidelines

Details main circuit, control circuit, external keypad, and wiring protection procedures.

Basic Operation Guidelines

Keypad Operation and Display

Explains LED and LCD keypad functions, parameter display, and editing.

Core VFD Configuration and Control Modes

Covers parameter configuration, autotuning, control modes (Vector, Space Voltage), and frequency settings.

Advanced Functions and Controls

Details Simple PLC, PID control, water pump control, and protection features.

Function Parameter List

Basic and Motor Parameters (P00-P03)

Covers basic functions, motor 1 parameters, vector control, and V/F control for motor 1.

Control and I/O Parameters (P04-P07, P09-P11)

Details V/F control for motor 2, input/output terminals, human-machine interface, enhanced functions, PID, and protection.

Specific Functions and Settings (P10, P12-P28, P90-P96)

Covers Simple PLC, motor 2 parameters, communication, status, HVAC, water pump, and protection functions.

Troubleshooting Common Faults

Fault Indicators and Reset

Explains how faults are indicated and how to reset them.

Fault History and Solutions

Lists common faults, their causes, and solutions for troubleshooting.

Interference Countermeasures

Addresses interference issues with sensors, RS485, motor cables, and RCDs.

VFD Maintenance

Periodical Inspection and Cooling Fan

Outlines routine checks for VFD components and procedures for cooling fan replacement.

Capacitor and Power Cable Maintenance

Describes capacitor reforming, replacement, and power cable inspection.

Communication Protocol

Modbus RTU Communication

Details Modbus protocol, RTU frame structure, error checks, and command examples.

Expansion Card Communication

Explains wiring and functions for PROFIBUS, CAN, and PROFINET expansion cards.

Technical Data and Compliance

Derating, Specifications, and EMC

Covers derating conditions, technical specifications, EMC requirements, and application standards.

Dimension Drawings

Keypad and VFD Mounting Dimensions

Provides detailed dimensions for keypads, VFDs, and mounting brackets.

Optional Peripheral Accessories

Filters, Reactors, and Cables

Details selection guidelines for filters, reactors, and power/control cables.

Breakers, Contactors, and Other Accessories

Covers selection of breakers, contactors, and other optional accessories.

Further Information

Product Queries and Feedback

Contact information for product queries, service, and manual feedback.

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