YASKAWA GPD 506/P5 Manuale utente

GPD 506 / Modbus®RTU

Technical Manual

Technical References / Support i

Technical References

Refer to the following publications for further information about the GPD 506/P5:

•GPD 506/P5 Technical Manual

Publication TM 4506

•RS-232C/485 Interface Card Installation Sheet

Publication 02Y00025-0409

Refer to the following Modicon publication for technical information on Modbus RTU protocol:

•Modicon Modbus Protocol Reference Guide

Publication PI-MBUS-300 Rev. D

Support

Technical Support Center-

Provide telephone assistance related to installation, start-up, programming, and

troubleshooting drives and communication products. For technical phone

support call 1-800-541-0939

Contents 1

Contents

Technical References / Support i

Contents 1

Chapter 1 GPD 506/P5 and Serial Communication 1-1

Introduction to GPD 506 Modbus RTU Communication 1-2

Standard RS-232 C/D Serial Communication 1-2

The RS-232 C/D to RS-485 Converter Board 1-3

Figure 1-1. The CM086 Board 1-3

Chapter 2 RS-232 C/D Serial Communication 2-1

RS-232 C/D Serial Communication 2-2

Figure 2-1. RS-232 C/D Pin-out at 2CN Connector 2-2

Chapter 3 Installation of CM086 Board 3-1

Installation Procedure 3-2

Figure 3-1. Position of the CM086 Board on the GPD 506 3-2

Chapter 4 Wiring of the CM086 Board 4-1

Connection of Multiple Drives 4-2

Figure 4-1. CM086 Connection Diagram 4-2

Wiring Instructions 4-3

Figure 4-2. Shield Termination 4-3

Table 4-1. Functions of Terminal Block TC1 4-3

Table 4-2. Applicable Wire Sizes for Terminal Block TC1 4-3

Terminating Resistors 4-4

Figure 4-3. SW1 Location on the CM086 Board 4-4

Chapter 5 Setting GPD 506 Parameters for Communication 5-1

Run/Stop and Frequency Selection 5-2

Communication Set up Parameters 5-3

“ENTER” Command 5-5

Chapter 6 The Message Format 6-1

Message Functions 6-2

Read Multiple Registers - 03h 6-3

Loop-back Test - 08h 6-6

Write Multiple Registers - 10h 6-8

No Response Message 6-11

CRC-16 6-11

Chapter 7 Registers 7-1

Simultaneous Broadcast Registers 7-2

Command Registers 7-3

Monitor Registers 7-4

Drive Parameter Registers 7-7

Special Registers 7-18

Contents 2

Chapter 8 Error Codes and Troubleshooting 8-1

Communication Error (CE) 8-2

Modbus Error Codes 8-2

Figure 8-1. Fault Response Message 8-2

Chapter 9 Command Priority 9-1

Command Priority 9-2

Table 9-1. Set up for Serial Communication Control 9-3

Table 9-2. Set up for External Terminals Control 9-4

Table 9-3. Set up for Digital Operator Control 9-5

Appendix A Product Specifications A-1

Appendix B Spare Parts List B-1

Appendix C RS232-C/D Comments C-1

GPD 506/P5 and Serial Communication 1-1

Chapter 1

GPD 506/P5 and Serial Communication

•Introduction to GPD 506/P5 Modbus RTU Communication

•Standard RS-232 C/D Serial Communication

•The RS-232 C/D to RS-485 Converter Board

•Figure 1-1. The CM086 Board

1-2 GPD 506/P5 and Serial Communications

Introduction to GPD 506/P5 Modbus RTU Communication

This manual describes the set-up and protocol for Modbus Communication. The GPD 506 offers

RS-232 C/D serial communication as standard, and RS-485 as an option.

The Modbus RTU protocol requires that the controller communicates using a master-slave

technique, in which only one device (the master) can initiate transactions. The other devices (the

slaves) respond by supplying the requested data to the master, or by taking the action requested.

The GPD 506 drive must act in the slave mode.

A complete understanding of drive programming and operation is required before attempting

serial communication operation. A full discussion of programming and operation is covered in the

GPD 506 technical manual - TM 4506.

GPD 506 / Modbus RTU Specifications

The data that may be sent or received from the drive consists of:

-Run Command

-Frequency Reference

-Fault Contents

-Drive Status

-Drive Parameter Settings

The following table illustrates whether the serial communication specifications are fixed or user

selectable. If the specification is fixed, the fixed value is shown in the last column. If the

specification is selectable, the range of allowed values is shown in the last column.

Communication Specification Fixed or Selectable Range

Baud Rate Selectable 2400, 4800, or 9600 bps

Data Bit Fixed 8

Parity Selectable None, Even, or Odd

Stop Bit Fixed 1

Nodes RS-232 C/D point-to-point only

Nodes Selectable for RS-485 maximum of 31 nodes

Standard RS-232 C/D Serial Communication

The GPD506 drive offers RS-232 C/D serial communications as a standard feature of the drive.

RS-232 C/D has a maximum transmission distance of 50 feet. RS-232 C/D allows point-to-point

communications only. The specifications for wiring and pin outs for RS-232 C/D are presented

in Chapter 2.

GPD 506/P5 and Serial Communication 1-3

The RS-232 C/D to RS-485 Converter Board

The GPD 506 offers RS-485 serial communications as an option. RS-485 allows a maximum

transmission distance of 4000 feet and is capable of multi-drop (multiple devices) communication.

To obtain RS-485 communications an optional converter board must be purchased. This

RS-232 C/D to RS-485 Converter Board is represented by MagneTek part number CM086.

Read this manual thoroughly before installation, operation, maintenance, and inspection of the

CM086 Option Board.

CAUTION

The CM086 option board employs CMOS technology. Use proper electrostatic discharge (ESD)

procedures when handling this board to avoid possible damage due to static electricity.

The CM086 board is used to convert the drive’s RS-232 C/D standard function to offer RS-485

interface. The following diagram illustrates the CM086 board. (The figure is not actual size.)

Figure 1-1. The CM086 Board

RS-232 C/D Serial Communication 2-1

Chapter 2

RS-232 C/D Serial Communication

•RS-232 C/D Serial Communication

•Figure 2-1. RS-232 C/D Pin out at the 2CN Connector

2-2RS-232 C/D Communication

RS-232 C/D Serial Communication

RS-232 C/D Serial Communication is accessed through connector 2CN on the GPD 506 control

board. Pin 1 on the 2CN connector is for the transmission of data, Pin 2 is for the receipt of data,

and pins 6 and 7 are for the ground connection. The RS-232 C/D pin out is shown in the diagram

below.

Figure 2-1. RS-232 C/D Pin-out at 2CN Connector

Cable Specifications:

-cable should be a shielded, thin twisted wire 22-28 AWG

-cable pin out is as follows:

Computer - 9 Pin Female

D shell GPD 506 – 12 Pin Female

Connector for 2CN

3 - Tx 2 - Rx

2 - Rx 1 - Tx

5 - GND 5, 6 and 7 - GND

RS-232 C/D Serial Communication 2-3

-pin out for devices other than a computer (PC), such as a PLC, may vary.

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