Contents

SAFETY PRECAUTIONS
INTRODUCTION
CONTENTS
RELEVANT MANUALS
TERMS
GENERIC TERMS AND ABBREVIATIONS
MANUAL PAGE ORGANIZATION
FUTURE SUPPORT PLANNED
PART 1 OVERVIEW
- 1 OVERVIEW
  - 1.1 Instruction Configuration
  - 1.2 Data Specification Method
    - Bit data
    - 16-bit data (word data)
    - 32-bit data (double word data)
    - Real number data (floating-point data)
    - Character string data
  - 1.3 Execution Condition
  - 1.4 Precautions on Programming
    - Errors common to instructions
    - Timer, long timer, and long retentive timer type labels
    - Operations arising when the OUT and SET/RST instructions of the same device are used
PART 2 LISTS OF INSTRUCTIONS AND FUN/FB
- 2 MOTION SYSTEM INSTRUCTIONS
  - 2.1 Sequence Instructions
  - 2.2 Basic Instructions
  - 2.3 Application Instructions
    - Program control
    - Data processing
    - String processing
    - Real value processing
- 3 STANDARD FUNCTIONS/FUNCTION BLOCKS
  - 3.1 Standard Functions
  - 3.2 Standard Function Blocks
- 4 MOTION DEDICATED INSTRUCTIONS
PART 3 SEQUENCE INSTRUCTIONS
- 5 SEQUENCE INSTRUCTIONS
  - 5.1 Output Instructions
    - Out (excluding the timer and counter)
    - Timer
    - Long timer
    - Counter
    - Long counter
    - Setting devices
    - Resetting devices
PART 4 BASIC INSTRUCTIONS
- 6 BASIC INSTRUCTIONS
  - 6.1 Arithmetic Operation Instructions
    - Adding 16-bit binary data
    - Subtracting 16-bit binary data
    - Adding 32-bit binary data
    - Subtracting 32-bit binary data
    - Multiplying 16-bit binary data
    - Dividing 16-bit binary data
    - Multiplying 32-bit binary data
    - Dividing 32-bit binary data
    - Incrementing 16-bit binary data
    - Decrementing 16-bit binary data
    - Incrementing 32-bit binary data
    - Decrementing 32-bit binary data
  - 6.2 Logical Operation Instructions
    - Performing an AND operation on 16-bit data
    - Performing an AND operation on 32-bit data
    - Performing an OR operation on 16-bit data
    - Performing an OR operation on 32-bit data
    - Performing an XOR operation on 16-bit data
    - Performing an XOR operation on 32-bit data
    - Performing an XNOR operation on 16-bit data
    - Performing an XNOR operation on 32-bit data
  - 6.3 Data Conversion Instructions
    - Two's complement of 16-bit binary data (sign inversion)
    - Two's complement of 32-bit binary data (sign inversion)
  - 6.4 Data Transfer Instructions
    - Transferring 16-bit binary data
    - Transferring 32-bit binary data
    - Inverting and transferring 16-bit binary data
    - Inverting and transferring 32-bit binary data
    - Inverting and transferring 1-bit data
    - Transferring 1-bit data
PART 5 APPLICATION INSTRUCTIONS
- 7 PROGRAM CONTROL
  - 7.1 Program Execution Control Instructions
    - Disabling/enabling interrupt programs
  - 7.2 Program Control Instructions
    - Changing the program execution type to standby type
    - Changing the program execution type to scan execution type
- 8 DATA PROCESSING
  - 8.1 Data Processing Instructions
    - Adding 16-bit binary data
    - Adding 32-bit binary data
    - Calculating the mean value of 16-bit binary data
    - Calculating the mean value of 32-bit binary data
    - Calculating the square root of 32-bit binary data
- 9 STRING PROCESSING
  - 9.1 String Processing Instructions
    - Transferring string data
    - Transferring Unicode string data
- 10 REAL VALUE PEOCESSING
  - 10.1 Floating-point instruction
    - Adding single-precision real numbers
    - Subtracting single-precision real numbers
    - Adding double-precision real numbers
    - Subtracting double-precision real numbers
    - Multiplying single-precision real numbers
    - Dividing single-precision real numbers
    - Multiplying double-precision real numbers
    - Dividing double-precision real numbers
    - Inverting the sign of single-precision real number
    - Inverting the sign of double-precision real number
    - Transferring single-precision real number
    - Transferring double-precision real number
PART 6 STANDARD FUNCTIONS
- 11 TYPE CONVERSION FUNCTIONS
  - 11.1 Converting BOOL to WORD
  - 11.2 Converting BOOL to DWORD
  - 11.3 Converting BOOL to INT
  - 11.4 Converting BOOL to DINT
  - 11.5 Converting BOOL to TIME
  - 11.6 Converting WORD to BOOL
  - 11.7 Converting WORD to DWORD
  - 11.8 Converting WORD to INT
  - 11.9 Converting WORD to DINT
  - 11.10 Converting WORD to TIME
  - 11.11 Converting DWORD to BOOL
  - 11.12 Converting DWORD to WORD
  - 11.13 Converting DWORD to INT
  - 11.14 Converting DWORD to DINT
  - 11.15 Converting DWORD to TIME
  - 11.16 Converting INT to BOOL
  - 11.17 Converting INT to WORD
  - 11.18 Converting INT to DWORD
  - 11.19 Converting INT to DINT
  - 11.20 Converting INT to REAL
  - 11.21 Converting INT to LREAL
  - 11.22 Converting INT to TIME
  - 11.23 Converting DINT to BOOL
  - 11.24 Converting DINT to WORD
  - 11.25 Converting DINT to DWORD
  - 11.26 Converting DINT to INT
  - 11.27 Converting DINT to REAL
  - 11.28 Converting DINT to LREAL
  - 11.29 Converting DINT to TIME
  - 11.30 Converting REAL to INT
  - 11.31 Converting REAL to DINT
  - 11.32 Converting REAL to LREAL
  - 11.33 Converting LREAL to INT
  - 11.34 Converting LREAL to DINT
  - 11.35 Converting LREAL to REAL
  - 11.36 Converting TIME to BOOL
  - 11.37 Converting TIME to WORD
  - 11.38 Converting TIME to DWORD
  - 11.39 Converting TIME to INT
  - 11.40 Converting TIME to DINT
- 12 SINGLE VARIABLE FUNCTIONS
  - 12.1 Calculating the Absolute Value
  - 12.2 Calculating the Square Root
  - 12.3 Calculating the Natural Logarithm
  - 12.4 Calculating the Common Logarithm
  - 12.5 Calculating the Exponent
  - 12.6 Calculating the Sine
  - 12.7 Calculating the Cosine
  - 12.8 Calculating the Tangent
  - 12.9 Calculating the Arc Sine
  - 12.10 Calculating the Arc Cosine
  - 12.11 Calculating the Arc Tangent
- 13 ARITHMETIC OPERATION FUNCTIONS
  - 13.1 Addition
  - 13.2 Multiplication
  - 13.3 Subtraction
  - 13.4 Division
  - 13.5 Remainder
  - 13.6 Assignment (Move Operation)
- 14 BOOLEAN FUNCTIONS
  - 14.1 NOT Operation
- 15 SELECTION FUNCTIONS
  - 15.1 Selecting the Maximum/Minimum Value
PART 7 STANDARD FUNCTION BLOCKS
- 16 BISTABLE FUNCTION BLOCKS
  - 16.1 Bistable Function Block (Set-Dominant)
  - 16.2 Bistable Function Block (Reset-Dominant)
- 17 EDGE DETECTION FUNCTION BLOCKS
  - 17.1 Detecting a Rising Edge
  - 17.2 Detecting a Falling Edge
- 18 TIMER FUNCTION BLOCKS
  - 18.1 Pulse Timer
  - 18.2 On Delay Timer
  - 18.3 Off Delay Timer
  - 18.4 Timer Function Block
PART 8 MOTION DEDICATED INSTRUCTIONS
- 19 MOTION DEDICATED INSTRUCTIONS
  - 19.1 Overview
  - 19.2 User Function Execution Instruction
INDEX
INSTRUCTION INDEX
REVISIONS
WARRANTY
TRADEMARKS

Mitsubishi Electric RD78G4 RD78G8 Programming Manual

Mitsubishi Electric RD78G4 RD78G8 manual cover

Pages 222

Year 2019

Language(s)

of 222

Mitsubishi Electric RD78G4 RD78G8 Specification

The Mitsubishi Electric RD78G4 and RD78G8 models are advanced refrigeration units designed for high efficiency and reliability in commercial and industrial settings. These units feature state-of-the-art inverter technology that ensures optimal energy consumption, reducing operational costs while maintaining consistent cooling performance. The RD78G4 model boasts a cooling capacity suitable for medium-scale applications, whereas the RD78G8 offers enhanced capacity for larger demands.

Both models incorporate a robust scroll compressor, known for its durability and quiet operation, ensuring minimal disruption in noise-sensitive environments. The refrigerant used is eco-friendly, aligning with global standards for environmental sustainability. Advanced electronic controls facilitate precise temperature regulation, allowing for customizable settings tailored to specific requirements.

The units are constructed with high-grade materials that provide excellent corrosion resistance, extending the lifespan of the equipment even in harsh environments. Their compact design allows for flexible installation options, making them ideal for spaces where room is a constraint.

Maintenance is streamlined with easily accessible service panels and diagnostic features that simplify troubleshooting and repairs. Additionally, both models are equipped with safety mechanisms to prevent overheating and other potential operational issues, ensuring reliable and safe performance over time.

Connectivity options include integration with building management systems, providing remote monitoring and control capabilities. This feature enhances operational efficiency by allowing real-time adjustments and performance tracking. Overall, the Mitsubishi Electric RD78G4 and RD78G8 models represent a blend of innovation, efficiency, and sustainability, making them an excellent choice for diverse refrigeration needs.

Mitsubishi Electric RD78G4 RD78G8 F.A.Q.

What are the key features of the Mitsubishi Electric RD78G4 servo amplifier?

The Mitsubishi Electric RD78G4 servo amplifier offers high-speed performance, precise control, and easy integration into various industrial applications. It supports multiple communication protocols and features advanced safety functions.

How can I troubleshoot communication errors with the RD78G8 module?

Start by checking all cable connections and ensuring that the correct communication settings are configured in the software. Verify that the network address and baud rate match those of the connected devices.

What maintenance steps should be regularly performed on the RD78G4 servo amplifier?

Regularly inspect the unit for dust accumulation and clean it as necessary. Check all electrical connections for signs of wear or damage. Additionally, ensure that cooling fans are operational and replace them if needed.

How do I reset the Mitsubishi Electric RD78G8 to factory settings?

To reset the RD78G8 to factory settings, access the system menu through the software interface, navigate to the reset options, and select 'Factory Reset'. Ensure that all important data is backed up before performing this action.

What are the common causes of overheating in the RD78G4 servo amplifier?

Common causes include inadequate ventilation, excessive ambient temperatures, and overloading of the servo amplifier. Ensure that the device is installed in a well-ventilated area and that the load specifications are not exceeded.

How can I improve the efficiency of my RD78G8 system?

To improve efficiency, ensure that the system is not overloaded and that all parameters are finely tuned to match the application's requirements. Regularly update the firmware and use energy-saving modes where applicable.

What should I do if the RD78G4 shows an unexpected error code?

Refer to the user manual for the specific error code and follow the troubleshooting steps provided. If the issue persists, contact Mitsubishi Electric support for further assistance.

Can the RD78G8 module be used in a network with other brands of automation equipment?

Yes, the RD78G8 module can be integrated into a network with equipment from other brands, provided that all devices support common communication protocols such as Ethernet/IP or Modbus.

What are the steps to update the firmware on the Mitsubishi Electric RD78G4?

Download the latest firmware from Mitsubishi Electric's website, connect the RD78G4 to a computer via the appropriate interface, and use the manufacturer’s software tools to upload and install the firmware update.

How do I configure the RD78G8 for a new application?

Start by setting up the hardware connections according to the application's requirements. Then, use the programming software to configure the parameters, such as speed, torque, and communication settings, to match the new application.