Mitsubishi Electric Q172CPUN MELSEC Q Series Motion Controller

Description

Integrating multi-axis motion control directly into the MELSEC Q platform, the Mitsubishi Electric Q172CPUN coordinates high-speed precision positioning across complex industrial profiles. This CPU module mounts on the standard Q-series base unit, operating alongside a PLC CPU to offload demanding interpolation and synchronization tasks. It communicates seamlessly with servo amplifiers over high-speed networks to deliver synchronized, deterministic response times required for heavy machinery and manufacturing assembly lines.

Features

• Supports multi-axis coordination of up to 8 axes of motion.
• Advanced multi-axis interpolation capabilities, including linear interpolation (up to 4 axes), circular interpolation (2 axes), and helical interpolation (3 axes).
• Versatile motion profiles with support for PTP (Point to Point), constant-speed positioning, and high-speed oscillation.
• Built-in engineering compensation metrics, including backlash compensation and configurable electronic gear ratios.
• Programmed utilizing dedicated motion instructions (EIA mechanical language) for complex path execution.

Applications

• Multi-axis packaging machinery and synchronized cartooning lines.
• High-speed pick-and-place systems and Cartesian gantry robots.
• Precision electronic assembly and rotary indexing tables.
• Textile machinery and multi-axis winding systems.

Technical Specifications

Connections and Interfaces

Alternative Models & Compatibility

The Q172CPUN is designed for MELSEC Q platforms, serving as a functional upgrade to legacy Q172CPU systems. When migrating from non-N models, verify that your active MT Developer software project configurations and CPU base-unit slot parameters match the updated memory maps of the Q172CPUN.

Application Pitfalls & Engineering Notes

Operating multiple high-speed motion CPUs on a shared backplane requires a careful calculation of the total 5VDC power budget. The Q172CPUN draws 1.14 A on the logic bus; ensure that the system power supply module (e.g., Q61P) has sufficient overhead to prevent sudden voltage drops during high-acceleration profiling across all 8 synchronized axes.

Commissioning & Wiring Tips

Always maintain minimum bending radiuses on SSCNET optical fiber and serial cables to avoid signal attenuation and communication dropouts. Use high-integrity shielding on external encoder signals, routing them completely separate from high-frequency servo motor power lines to prevent EMI noise injection into the motion controller registers.

Installation Guidelines

1. 1 Align the lower hook of the Q172CPUN module into the designated slot on the Q-series base unit.
2. 2 Firmly push the top of the module into the backplane connector until it clicks securely into place.
3. 3 Tighten the module fixing screw (M3) to a torque of 0.36 to 0.48 N-m to secure the system against industrial vibrations.
4. 4 Connect the SSCNET communications bus line and secure all adjacent field encoder ground straps.