Tutto sui PLC: la CPU
A practical engineering guide to PLC CPU operation, from deterministic scan cycles and I/O image tables to memory, communications, diagnostics, redundancy, processor sizing, and reliable system...
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.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Mitsubishi Electric |
| Model Number | Q172CPUN |
| Series | MELSEC Q |
| Control Type | Motion Controller CPU Module |
| Controlled Axes | Up to 8 axes |
| Internal Current Consumption (5VDC) | 1.14 A |
| Programming Language | Dedicated Motion Instructions (EIA Language) |
| Module Dimensions | 11.43 cm x 2.74 cm x 9.80 cm |
| Net Module Weight | 0.22 kg |
| Shipping Weight (Calculated) | 2.00 kg |
| Country of Origin | Japan |
| Interface / Connector | Functional Assignment |
|---|---|
| Base Unit Connector | High-speed inter-CPU parallel bus connection for MELSEC Q backplanes. |
| SSCNET Connector | Dedicated synchronous high-speed serial network connection for MR series servo amplifiers. |
| Peripheral Port | Connection port for motion development and calibration software (MT Developer). |
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.
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.
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.
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Returns & Warranty

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.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Mitsubishi Electric |
| Model Number | Q172CPUN |
| Series | MELSEC Q |
| Control Type | Motion Controller CPU Module |
| Controlled Axes | Up to 8 axes |
| Internal Current Consumption (5VDC) | 1.14 A |
| Programming Language | Dedicated Motion Instructions (EIA Language) |
| Module Dimensions | 11.43 cm x 2.74 cm x 9.80 cm |
| Net Module Weight | 0.22 kg |
| Shipping Weight (Calculated) | 2.00 kg |
| Country of Origin | Japan |
| Interface / Connector | Functional Assignment |
|---|---|
| Base Unit Connector | High-speed inter-CPU parallel bus connection for MELSEC Q backplanes. |
| SSCNET Connector | Dedicated synchronous high-speed serial network connection for MR series servo amplifiers. |
| Peripheral Port | Connection port for motion development and calibration software (MT Developer). |
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.
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.
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.
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
United States
|