Product Analysis: Mitsubishi Q02HCPU CPU Module
The Mitsubishi Q02HCPU is a high-speed, high-performance CPU module part of the industry-leading MELSEC-Q series. This «H» (High Speed) model is designed for mid-to-large scale automation tasks that require rapid logic processing and extensive data handling. It is a staple in the automotive, semiconductor, and food processing industries, where cycle times are measured in microseconds and system reliability is non-negotiable.
High-Speed Logic and Multi-CPU Capability
The Q02HCPU features a staggering basic instruction processing speed of 34 nanoseconds. With a program capacity of 28,000 steps (112 KB), it can manage complex algorithms, multiple PID loops, and sophisticated motion profiles simultaneously. One of its standout features is support for Mitsubishi’s Multi-CPU architecture, allowing the Q02HCPU to work in parallel with up to three other Q-series CPUs (such as Motion or PC CPUs) on the same base unit to distribute the processing load efficiently.
Key Technical Characteristics
- Part Number: Q02HCPU.
- Program Capacity: 28k steps (112 KB).
- Instruction Speed: 34 ns (LD instruction).
- I/O Points: 4096 (Direct and Remote).
- Standard Interfaces: USB and RS-232 for programming and diagnostics.
- Multi-CPU Support: Up to 4 CPUs on one backplane.
- Memory: Flash ROM and RAM (Battery backed).
- Processing: High-speed sequence execution.
System Integration and Performance
The Q02HCPU integrates seamlessly with the entire MELSEC-Q ecosystem, including CC-Link IE Field networking and high-speed analog modules. It is configured using GX Works2 or GX Developer software, which provides a robust environment for ladder logic, structured text, and function block programming. Its internal clock and diagnostic log allow maintenance teams to track system events with millimetric time-stamping, facilitating rapid root-cause analysis during downtime.
| Feature | Value |
| Device Memory | Standard RAM 64 KB |
| Internal Current (5V DC) | 0.64 A |
| Mass | 0.20 kg |
Technical Note
The Q02HCPU requires a Q6BAT lithium battery to retain the program and device data during power-off. It is recommended to replace this battery every 5 years to prevent data loss. For modern Ethernet-based communications, the Q02HCPU can be paired with a QJ71E71-100 Ethernet module or upgraded to the Q03UDECPU which features an integrated port.
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