Mitsubishi Electric Q173CPUN MELSEC Q Series Motion Controller

Description

Engineered for high-performance multi-axis synchronization, the Mitsubishi Electric Q173CPUN serves as a dedicated motion CPU within the MELSEC Q Series platform. This controller seamlessly integrates on the same base unit alongside standard Q Series PLC CPUs, distributing processing loads to achieve precise synchronization of complex machinery. It supports advanced motion control tasks such as virtual axis configuration, electronic camming, and synchronized gear operations while relying on highly immune fiber-optic communication interfaces to interface with external servo amplifiers.

Features

• Multi-CPU Architecture: Installs directly onto the Q Series backplane to share data with the main host PLC CPU at high bus speeds.
• Robust Synchronization: Executes complex electronic cams, mechanical coordinate conversions, and electronic gear ratios across multiple channels simultaneously.
• SSCNET III Integration: Uses fiber-optic communication lines for noise-immune, high-speed data transmission to the servo drives.
• Expanded I/O Management: Manages up to 8192 control system points to handle complex system feedback and signal mapping.

Applications

• High-speed packaging and wrapping machinery
• Multi-axis printing presses and paper converting machinery
• Automated pick-and-place systems and semiconductor manufacturing lines
• Synchronized gantry crane positioning systems

Technical Specifications Table

Connections and Interfaces

Empirical Engineering Insights

Alternative Models & Compatibility

When migrating from older non-N models like the Q173CPU, verify the physical network layout. The standard Q173CPU uses copper-based SSCNET, while the Q173CPUN utilizes fiber-optic SSCNET III. This shift requires changing the communication cables to optical fiber and ensures the corresponding servo drives support SSCNET III protocols.

Application Pitfalls & Engineering Notes

Backplane power calculation is critical. Because a motion controller CPU draws higher current from the backplane 5V supply than standard digital I/O modules, you must sum the current consumption of the PLC CPU, the Q173CPUN, and all host modules to prevent overload on the system power supply (e.g., Q61P vs Q63P).

Commissioning & Wiring Tips

Handle the SSCNET III optical fiber cables with extreme care during panel wiring. Maintaining a minimum bend radius of 25 mm is critical; exceeding this limit can lead to optical signal attenuation, causing mysterious communications failures or sporadic axis fault trips (such as code 32 or 10) during high-speed operation cycles.

Installation Guidelines