YASKAWA GPD 506/P5 Bedienungsanleitung
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
12
1
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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