Mitsubishi Electric RD77GF8 User Manual

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MELSEC iQ-R Simple Motion Module

User's Manual (Network)

-RD77GF4

-RD77GF8

-RD77GF16

-RD77GF32

Table of Contents

Default Chapter3
- Safety Precautions3
- Conditions of Use for the Product11
- Compliance with Emc and Low Voltage Directives12
- Introduction12
- Table of Contents13
- Relevant Manuals15
- Terms16
Chapter 1 Functions19
Fixed Cycle Communication19
CC-Link IE Field Network Synchronous Communication Function19
Cyclic Transmission20
- Data Flow and Link Device Assignment20
- Link Refresh23
- Direct Access to Link Devices25
- Cyclic Data Integrity Assurance28
- Interlink Transmission34
- Input and Output Status Settings When Failure Occurs35
- Output Status Setting for CPU STOP36
- Cyclic Transmission Stop and Restart37
Transient Transmission38
- Communications Within the same Network38
- Communications with Different Networks39
IP Packet Transfer Function42
- System Configuration43
- Setting44
- IP Communication Test49
- Access Range51
- Relay Using CC-Link IE Controller Network52
- Precautions53
- Example of Communications Using the IP Packet Transfer Function55
Safety Communication Function62
- Communications with Safety Stations62
- Safety Station Interlock Function65
Chapter 2 Parameter Settings66
Setting Parameters66
Required Settings66
- Station Type67
- Network no67
- Station no67
- Parameter Setting Method67
Basic Settings68
- Network Configuration Settings69
- Refresh Settings72
- Network Topology75
Application Settings76
- Supplementary Cyclic Settings77
- IP Address77
- Communication Mode78
- Parameter Name78
- Dynamic Routing78
- Event Reception from Other Stations78
- Module Operation Mode79
- Interlink Transmission Settings79
- Safety Communication Setting83
Chapter 3 Programming86
Precautions for Programming86
Communication Example of Safety Communication Function89
- System Configuration Example89
- Setting in the Master Station and Remote Device Station90
- Setting in the Local Station97
- Checking the Network Status99
- Program Examples100
Chapter 4 Troubleshooting102
Checking with LED102
Checking the Module Status105
Checking the Network Status107
Troubleshooting by Symptom127
List of Parameter Nos132
Event List133
Appendices135
Appendix 1 Module Label135
Appendix 2 Buffer Memory136
- List of Buffer Memory Addresses136
- Details of Buffer Memory Addresses139
Appendix 3 List of Link Special Relay (SB)145
Appendix 4 List of Link Special Register (SW)154
Appendix 5 Dedicated Instruction168
- Precautions for Dedicated Instructions169
Appendix 6 Processing Time170
- Link Scan Time171
- Cyclic Transmission Delay Time172
- Interlink Transmission Time175
- Transmission Delay Time of Safety Communications176
Appendix 7 Differences in Cyclic Transmission Modes179
Index180
- Revisions182
- Warranty183
- Trademarks184

Questions and Answers:

J
Jessica LongAug 6, 2025
What happens when a moderate error occurs on a Mitsubishi Electric RD77GF8?
- D
  David MitchellAug 6, 2025
  A moderate error in your Mitsubishi Electric Controller, such as a parameter error, affects module operation, causing it to stop operating.

Mitsubishi Electric RD77GF8 Specifications

General

Brand	Mitsubishi Electric
Model	RD77GF8
Category	Controller
Language	English

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