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RD78GHV
The RD78GHV is a high-performance motion controller from Mitsubishi Electric’s MELSEC iQ-R Series, designed for ultra-high-speed, multi-axis servo control in advanced automation systems. It supports up to 256 axes with nanosecond-level synchronization, making it ideal for precision applications such as semiconductor manufacturing, robotics, and high-speed packaging.
DESCRIBE
Key Features & Specifications
Motion Control Performance
Control Axes: Up to 256 axes (with network expansion)

High-Speed Synchronization: 1 ns unit for precise multi-axis coordination

Maximum Command Speed: 4 Mpulses/s (for ultra-fast positioning)

Interpolation Modes: Linear, circular, helical, and spline interpolation

Advanced Vibration Suppression: Adaptive tuning for smooth motion

Network & Communication
Built-in Interfaces:

SSCNET III/H (High-speed fiber-optic network) – Supports real-time synchronous control

Ethernet (10BASE-T/100BASE-TX) – For programming, monitoring, and data exchange

Compatible Protocols:

SLMP (Seamless Message Protocol) – For PLC communication

MC Protocol – For SCADA & HMI integration

OPC UA (with additional module) – For Industry 4.0 connectivity

Programming & Configuration
Software: MELSOFT MT Developer2 (dedicated motion control software)

Programming Methods:

Motion SFC (Sequential Function Chart)

Ladder Logic & Structured Text (ST)

Drag-and-drop motion programming for simplified setup

Simulation & Tuning:

Virtual motion test environment

Real-time trace & diagnostics

Expansion & Compatibility
MELSEC iQ-R Platform Integration: Works with R-series PLCs (e.g., R32/R16CPU)

Servo Compatibility:

MR-J5 Series (Next-gen servos with 22-bit encoders)

MR-J4 Series (Legacy high-performance servos)

I/O Modules: Supports R-series digital/analog I/O for integrated control

Safety & Reliability
Safety Functions:

STO (Safe Torque Off) support

Safe Motion Monitoring (SSM)

Redundancy Options: Dual CPU & network redundancy (for mission-critical apps)

Error Logging & Diagnostics: Built-in troubleshooting tools
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