OVERVIEW

Official designation: Mitsubishi Q03UDECPU (MELSEC-Q series, Universal Model QCPU)

Role/Application: A high-performance PLC CPU module designed for synchronized, high-speed control in complex automation systems, offering built-in Ethernet and multiple communication ports.

KEY SPECS SUMMARY

Power: 5 V DC, 0.33 A internal current consumption

Interfaces / Ports: Built-in Ethernet (RJ45), USB, Memory card slot

Indicators: RUN, STOP, ERR, L-SET, E-NET, R/W, BATT

Operating Temp: 0 to 55 degrees C

Platform / Compatibility: MELSEC-Q Universal Base Unit, GX Works2/3 software

Limit: 4096 I/O points, 30K steps program memory

Lifecycle: To be discontinued, replacement Q03UDVCPU or R04CPU

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the minimum execution speed for the basic instruction LD X0?

A: The basic instruction processing speed is 20 ns (0.02 microseconds).

Wiring & Installation:

Q: What are the physical dimensions and weight of the Q03UDECPU module?

A: Dimensions are 27.4 mm wide, 98 mm high, 89.3 mm deep, with a weight of 0.2 kg.

Troubleshooting & Compatibility:

Q: What does a red ERR LED indicate on the CPU module?

A: The ERR LED indicates a major error detected by the self-diagnostic function, such as a watchdog timer error.

Replacement & Upgrades:

Q: Which newer model is the recommended direct replacement for the Q03UDECPU?

A: The Q03UDVCPU model is the most direct functional replacement for this unit.