Delta VFD022EL43W User Manual

Chapter 4 Parameters  VFD-EL-W
4-81
Command message: Response message:
‘7’ ‘7’
‘0’ ‘0’
LRC Check
‘7’
LRC Check
‘7’
‘1’ ‘1’
END
CR
END
CR
LF LF
RTU mode:
Command message: Response message:
ADR 01H ADR 01H
CMD 08H CMD 08H
Data
00H
Data
00H
00H 00H
Data
17H
Data
17H
70H 70H
CRC CHK Low 8EH CRC CHK Low 8EH
CRC CHK High 0EH CRC CHK High 0EH
4. CRC (Cyclical Redundancy Check) is calculated by the following steps:
Step 1: Load a 16-bit register (called CRC register) with FFFFH.
Step 2: Exclusive OR the first 8-bit byte of the command message with the low order byte of the 16-bit
CRC register, storing the result in the CRC register.
Step 3: Examine the LSB of CRC register.
Step 4: If the LSB of CRC register is 0, shift the CRC register one bit to the right with MSB zero filling, then
repeat step 3. If the LSB of CRC register is 1, shift the CRC register one bit to the right with MSB zero
filling, Exclusive OR the CRC register with the polynomial value A001H, then repeat step 3.
Step 5: Repeat step 3 and 4 until eight shifts have been performed. When this is done, a complete 8-bit
byte will have been processed.
Step 6: Repeat step 2 to 5 for the next 8-bit byte of the command message. Continue doing this until all
bytes have been processed. The final content of the CRC register is the CRC value. When transmitting the
CRC value in the message, the upper and lower bytes of the CRC value must be swapped, that is the
lower order byte will be transmitted first.
The following is an example of CRC generation using C language. The function takes two arguments:
Unsigned char* data  a pointer to the message buffer
Unsigned char length  the quantity of bytes in the message buffer
The function returns the CRC value as a type of unsigned integer.
Unsigned int crc_chk(unsigned char* data, unsigned char length){
int j;
unsigned int reg_crc=0xFFFF;
while(length--){
reg_crc ^= *data++;
for(j=0;j<8;j++){
if(reg_crc & 0x01){ /* LSB(b0)=1 */
reg_crc=(reg_crc>>1) ^ 0xA001;
}else{
reg_crc=reg_crc >>1;
}
}
}
return reg_crc;
}

Delta VFD022EL43W Specifications

General

Brand	Delta
Model	VFD022EL43W
Category	DC Drives
Language	English

Summary

Preface

Safety and Precautions

Installation Safety Guidelines

Essential safety guidelines to read before connecting power to the AC motor drive.

General Safety Cautions

Important safety cautions regarding AC motor drive installation and usage.

Chapter 1 Introduction

Receiving and Inspection

Procedures for inspecting the AC motor drive upon receipt to ensure it is undamaged.

Preparation for Installation and Wiring

Guidelines for preparing the installation environment and wiring the AC motor drive.

Dimensions

Detailed physical dimensions for different frames of the AC motor drive.

Chapter 2 Installation and Wiring

Wiring Overview

General precautions and procedures for wiring the AC motor drive.

External Wiring

Diagrams and explanations for external wiring components like reactors and filters.

Main Circuit

Details on connecting the main power circuit terminals for AC motor drives.

Control Terminals

Explanation of the functions and connections for control terminals.

NPN / PNP Mode

Description of NPN and PNP modes for digital input signal configuration.

Chapter 3 Keypad and Start-up

Digital Keypad Description

Overview of the digital keypad functions, LEDs, and display messages.

Operation Method

Setting the AC motor drive's operation method via keypad, communication, or terminals.

Trial Run Procedure

Steps and checks for performing a trial run of the AC motor drive.

Chapter 4 Parameters

Summary of Parameter Settings

An overview of parameter groups and their functions for easy setting.

Parameter Settings for Applications

Guidance on parameter settings tailored for specific applications.

Description of Parameter Settings

Detailed explanations of user parameters and their settings.

Chapter 5 Troubleshooting

Over-Current (oc) Troubleshooting

Flowchart and corrective actions for over-current faults.

Over-Voltage (ov) Troubleshooting

Flowchart and corrective actions for over-voltage faults.

Low Voltage (Lv) Troubleshooting

Flowchart and corrective actions for low voltage faults.

Overheat (oH1) Troubleshooting

Flowchart and corrective actions for overheat faults.

Overload (oL) Troubleshooting

Flowchart and corrective actions for overload faults.

Keypad Display Issues

Troubleshooting steps for abnormal or missing keypad displays.

Phase Loss (PHL) Troubleshooting

Flowchart and corrective actions for phase loss faults.

Motor Does Not Run Troubleshooting

Troubleshooting steps for when the motor does not run.

Motor Speed Control Issues

Troubleshooting steps when the motor speed cannot be changed.

Motor Stall During Acceleration

Troubleshooting steps for motor stalls during acceleration.

Motor Performance Issues

Troubleshooting steps when the motor does not run as expected.

Electromagnetic and Induction Noise

Solutions for mitigating electromagnetic and induction noise issues.

Operating Environment Conditions

Measures to address environmental conditions affecting the AC motor drive.

Affecting Other Machines

Solutions for AC motor drive interference with other machinery.

Chapter 6 Fault Code Information and Maintenance

Fault Code Information

List of fault codes, their descriptions, and corrective actions.

Maintenance and Inspections

Guidelines and schedule for maintaining AC motor drive components.

Appendix A Specifications

230V 1φ Series Specifications

Electrical and mechanical specifications for the 230V 1-phase series.

460V 3φ Series Specifications

Electrical and mechanical specifications for the 460V 3-phase series.

General Specifications

Comprehensive general specifications for the AC motor drive.

Environment for Operation, Storage and Transportation

Environmental conditions for operation, storage, and transportation.

Derating Curve for Ambient Temperature and Carrier Frequency

Derating curves showing how ambient temperature affects current.

Appendix B Accessories

Non-fuse Circuit Breaker Chart

Recommendations for non-fuse circuit breakers based on model.

AC Reactor Recommendations

Recommended AC input and output reactors for different models.

Digital Keypad Options

Details on VFD-PU06 and VFD-PU08/VFD-PU08V digital keypads.

Optional Cooling Fan Kit

Installation instructions for the optional cooling fan.

Appendix C How to Select the Right AC Motor Drive

Capacity Formulas for Motor Drive Selection

Formulas for calculating capacity requirements for AC motor drives.

General Precautions for AC Motor Drive Selection

Important precautions to consider when selecting an AC motor drive.

Choosing a Suitable Motor

Guidelines for selecting appropriate motors to use with the AC motor drive.