Contents

SAFETY PRECAUTIONS
INTRODUCTION
COMPLIANCE WITH EMC AND LOW VOLTAGE DIRECTIVES
CONTENTS
RELEVANT MANUALS
TERMS
GENERIC TERMS AND ABBREVIATIONS
1 START AND STOP
- 1.1 Start
  - Multiple axes simultaneous start
- 1.2 Stop
- 1.3 Restart
2 HOME POSITION RETURN CONTROL
- 2.1 Outline of Home Position Return Control
  - Two types of home position return control
- 2.2 Machine Home Position Return
  - Outline of the machine home position return operation
  - Machine home position return method
  - Driver home position return method
- 2.3 Fast Home Position Return
  - Outline of the fast home position return operation
3 MAJOR POSITIONING CONTROL
- 3.1 Outline of Major Positioning Controls
  - Data required for major positioning control
  - Operation patterns of major positioning controls
  - Designating the positioning address
  - Confirming the current value
  - Control unit "degree" handling
  - Interpolation control
- 3.2 Setting the Positioning Data
  - Relation between each control and positioning data
  - 1-axis linear control
  - 2-axis linear interpolation control
  - 3-axis linear interpolation control
  - 4-axis linear interpolation control
  - Fixed-feed control
  - 2-axis circular interpolation control with sub point designation
  - 2-axis circular interpolation control with center point designation
  - 3-axis helical interpolation control with sub point designation
  - 3-axis helical interpolation control with center point designation
  - Speed control
  - Speed-position switching control (INC mode)
  - Speed-position switching control (ABS mode)
  - Position-speed switching control
  - Current value changing
  - NOP instruction
  - JUMP instruction
  - LOOP
  - LEND
4 HIGH-LEVEL POSITIONING CONTROL
- 4.1 Outline of High-level Positioning Control
  - Data required for high-level positioning control
  - "Block start data" and "condition data" configuration
- 4.2 High-level Positioning Control Execution Procedure
- 4.3 Setting the Block Start Data
  - Relation between various controls and block start data
  - Block start
  - Condition Start
  - Wait Start
  - Simultaneous Start
  - Repeated start (FOR Loop)
  - Repeated start (FOR condition)
  - Restrictions when using the NEXT Start
- 4.4 Setting the Condition Data
  - Relation between various controls and the condition data
  - Condition data setting examples
- 4.5 Start Program for High-level Positioning Control
  - Starting high-level positioning control
  - Example of a start program for high-level positioning control
5 MANUAL CONTROL
- 5.1 Outline of Manual Control
  - Three manual control methods
- 5.2 JOG Operation
  - Outline of JOG operation
  - JOG operation execution procedure
  - Setting the required parameters for JOG operation
  - Creating start programs for JOG operation
  - JOG operation example
- 5.3 Inching Operation
  - Outline of inching operation
  - Inching operation execution procedure
  - Setting the required parameters for inching operation
  - Creating a program to enable/disable the inching operation
  - Inching operation example
- 5.4 Manual Pulse Generator Operation
  - Outline of manual pulse generator operation
  - Manual pulse generator operation execution procedure
  - Setting the required parameters for manual pulse generator operation
  - Creating a program to enable/disable the manual pulse generator operation
6 INTER-MODULE SYNCHRONIZATION FUNCTION
7 EXPANSION CONTROL
- 7.1 Speed-torque Control
  - Outline of speed-torque control
  - Setting the required parameters for speed-torque control
  - Setting the required data for speed-torque control
  - Operation of speed-torque control
  - Servo OFF command valid function during speed-torque control
- 7.2 Advanced synchronous control
8 CONTROL SUB FUNCTIONS
- 8.1 Outline of Sub Functions
  - Outline of sub functions
- 8.2 Functions for Compensating the Control
  - Backlash compensation function
  - Electronic gear function
  - Near pass function
- 8.3 Functions to Limit the Control
  - Speed limit function
  - Torque limit function
  - Software stroke limit function
  - Hardware stroke limit function
  - Forced stop function
- 8.4 Functions to Change the Control Details
  - Speed change function
  - Override function
  - Acceleration/deceleration time change function
  - Torque change function
  - Target position change function
- 8.5 Functions Related to Start
  - Pre-reading start function
- 8.6 Absolute Position System
- 8.7 Functions Related to Stop
  - Stop command processing for deceleration stop function
  - Continuous operation interrupt function
  - Step function
- 8.8 Other Functions
  - Skip function
  - M code output function
  - Teaching function
  - Command in-position function
  - Acceleration/deceleration processing function
  - Deceleration start flag function
  - Speed control 10 x multiplier setting for degree axis function
  - Operation setting for incompletion of home position return function
- 8.9 Servo ON/OFF
  - Servo ON/OFF
  - Follow-up function
9 COMMON FUNCTIONS
- 9.1 Outline of Common Functions
- 9.2 Parameter Initialization Function
- 9.3 Execution Data Backup Function
- 9.4 External Input Signal Select Function
- 9.5 History Monitor Function
- 9.6 Virtual Servo Amplifier Function
- 9.7 Mark Detection Function
- 9.8 Optional Data Monitor Function
- 9.9 Event History Function
- 9.10 Servo Transient Transmission Function
- 9.11 Test mode
- 9.12 Software Installation to the Own Module
  - Installation of the motion system software
  - File configuration of the motion system software
  - Installation method of the motion system software
10 PARAMETER SETTING
- 10.1 Parameter Setting Procedure
- 10.2 Module Parameter
  - Refresh settings
- 10.3 Simple Motion Module Setting
11 SPECIFICATIONS OF I/O SIGNALS WITH CPU MODULES
- 11.1 List of Input/Output Signals with CPU Modules
- 11.2 Details of Input Signals
- 11.3 Details of Output Signals
12 DATA USED FOR POSITIONING CONTROL
- 12.1 Types of Data
  - Parameters and data required for control
  - Setting items for servo network composition parameters
  - Setting items for common parameters
  - Setting items for positioning parameters
  - Setting items for home position return parameters
  - Setting items for extended parameters
  - Setting items for positioning data
  - Setting items for block start data
  - Setting items for condition data
  - Types and roles of monitor data
  - Types and roles of control data
- 12.2 List of Buffer Memory Addresses
- 12.3 Basic Setting
  - Servo network composition parameters
  - Common parameters
  - Basic parameters 1
  - Basic parameters 2
  - Detailed parameters 1
  - Detailed parameters 2
  - Home position return basic parameters
  - Home position return detailed parameters
  - Extended parameters
  - Servo object specification area
- 12.4 Positioning data
- 12.5 Block Start Data
- 12.6 Condition Data
- 12.7 Monitor Data
  - System monitor data
  - Axis monitor data
  - Monitor data for slave device operation
- 12.8 Control Data
  - System control data
  - Axis control data
  - Control data for slave device operation
- 12.9 Memory Configuration and Data Process
  - Configuration and roles
  - Buffer memory area configuration
  - Data transmission timing
  - Data transmission process
13 PROGRAMMING
- 13.1 Precautions for Creating Program
- 13.2 List of Labels Used
- 13.3 Creating a Program
  - General configuration of program
- 13.4 Positioning Program Examples
14 TROUBLESHOOTING
- 14.1 Troubleshooting Procedure
  - Troubleshooting using the LEDs
  - Troubleshooting using the module status
- 14.2 Troubleshooting by Symptom
- 14.3 Error and Warning Details
  - Error type
  - Error code classification
  - Error storage
  - Warning type
  - Warning code classification
  - Warning storage
  - Clearing errors and warnings
- 14.4 List of Warning Codes
  - Motion module detection warnings
  - Servo amplifier detection warning
- 14.5 List of Error Codes
  - Motion module detection error
  - Servo amplifier detection error
APPENDICES
- Appendix 1 Module Label
- Appendix 2 How to Determine Buffer Memory Addresses
- Appendix 3 Devices Compatible with CC-Link IE TSN
  - MR-J5(W)-G (cyclic synchronous mode) connection method
  - MR-J5(W)-G (other than cyclic synchronous mode) connection method
  - MR-JET-G connection method
  - Related function
- Appendix 4 List of Add-on Libraries
- Appendix 5 List of Boot Software
- Appendix 6 Restrictions by the Version
INDEX
REVISIONS
WARRANTY
TRADEMARKS

Mitsubishi Electric RD78G4 RD78G8 RD78G16 User's Manual

Mitsubishi Electric RD78G4 RD78G8 RD78G16 manual cover

Pages 682

Year 2021

Language(s)

of 682

Mitsubishi Electric RD78G4 RD78G8 RD78G16

User's Manual

682 pages

User's Manual

154 pages

Mitsubishi Electric RD78G4 RD78G8 RD78G16 Specification

The Mitsubishi Electric RD78 series, encompassing models RD78G4, RD78G8, and RD78G16, offers versatile and efficient solutions for various industrial automation applications. These models are designed to deliver precise control and reliability, catering to the demands of modern manufacturing environments. Each model is engineered to optimize performance with a focus on scalability, allowing integration into diverse systems.

The RD78 series features high-speed processing capabilities, ensuring rapid execution of complex tasks while maintaining accuracy. This is supported by advanced motion control functions, which include synchronized control, interpolation, and continuous path control, providing flexibility in operation. The series supports a wide range of communication protocols, facilitating seamless connectivity with other devices and systems, enhancing interoperability across different platforms.

Energy efficiency is a key aspect of the RD78 series, achieved through design innovations that reduce power consumption without compromising performance. This is complemented by robust safety features, including overload protection and fault detection, ensuring safe and reliable operation in demanding environments. The compact design of these models allows for easy installation and integration into existing systems, minimizing downtime and maximizing productivity.

The RD78G4, RD78G8, and RD78G16 differ primarily in their capacity to handle varying levels of input and output, making them suitable for applications ranging from small-scale operations to large, complex systems. With a focus on durability and longevity, the RD78 series is built to withstand harsh industrial conditions, providing a cost-effective and sustainable solution for automation needs. Mitsubishi Electric's commitment to quality and innovation is evident in the RD78 series, offering users a reliable and efficient choice for enhancing automation processes.

Mitsubishi Electric RD78G4 RD78G8 RD78G16 F.A.Q.

How can I reset the RD78G4 module to its factory settings?

To reset the RD78G4 module, turn off the power supply, then while holding down the reset button, turn the power back on. Hold the button for approximately 10 seconds until the module's status LED blinks, indicating a successful reset.

What is the recommended maintenance schedule for the RD78G8 servo motor?

Regular maintenance for the RD78G8 includes checking connections and cleaning filters every 6 months, inspecting for wear and tear annually, and performing a full system diagnostic every 24 months.

How do I troubleshoot communication errors on the RD78G16?

First, ensure all cables are securely connected. Check the communication settings in the software to match the module's settings. If errors persist, try replacing cables and checking for firmware updates.

What should I do if the RD78G4 overheats during operation?

Ensure the RD78G4 is installed in a well-ventilated area. Check the cooling fans and filters for blockages. If overheating continues, reduce the load on the module or consult with Mitsubishi support for further assistance.

How can I improve the energy efficiency of my RD78G8 system?

Optimize the system by ensuring it is correctly sized for the application. Regularly maintain components to prevent unnecessary power draw due to friction or electrical losses. Utilize Mitsubishi's energy-saving functions in the control software.

How do I perform a firmware update on the RD78G16?

Download the latest firmware from the Mitsubishi Electric website. Connect your RD78G16 to a computer via USB or Ethernet, and use the Mitsubishi software tool to upload and install the new firmware. Ensure power is stable during the update process.

What are the common causes of vibration in the RD78G4 servo motor?

Vibration can be caused by misalignment, unbalanced loads, or worn bearings. Ensure that the motor is properly aligned with connected equipment, and inspect mounts and bearings for wear or damage.

How can I extend the lifespan of my RD78G8 module?

Maintain a regular cleaning and inspection schedule, avoid overloading the system, and ensure environmental conditions such as temperature and humidity remain within specified limits.

What steps should I take if the RD78G16 fails to start?

Check the power supply and ensure all connections are secure. Verify that the start command is being received by the module. If the problem persists, run a diagnostic using Mitsubishi's software tools.

How do I interpret error codes displayed on the RD78G4 module?

Refer to the Mitsubishi Electric RD78G series manual for error code definitions. Each code corresponds to a specific issue, such as communication failures or hardware malfunctions, and provides troubleshooting steps.