Implementing 3-Switch XOR Ladder Logic with Internal Bit
Implement a 3-SPST switch XOR light circuit in LogixPro or RSLogix 500 using an internal relay bit. Includes truth tables, boolean equations, and verified.
Engineers seeking fast execution cycle times and high-density memory allocations rely on the Mitsubishi Electric Q12HCPU to manage complex automated control structures. This high-performance PLC CPU module belongs to the widely deployed MELSEC-Q Series, engineered to deliver swift logic processing and versatile data handling for demanding industrial environments. The controller supports multiple programming paradigms, including structured function charts (SFC), function blocks, and structured text, permitting highly modular program architecture.
With an extensive capacity of 124K steps and a dedicated program memory of 496 KB, the Q12HCPU easily accommodates complex algorithms and large-scale device mapping. The module features robust sequence processing, enabling high-speed operations like LD instruction execution in just 34 ns. This makes it an ideal central controller for high-throughput factory automation, municipal water systems, and heavy industrial assembly lines.
| Mitsubishi Electric |
| Q12HCPU |
| MELSEC-Q Series |
| Stored program iteration operation |
| Refresh method (Direct access I/O possible) |
| 124K steps (496 KB) |
| 34 ns |
| 102 ns |
| 256 KB |
| 496 KB |
| 4096 points |
| 8192 points |
| 0.64 A |
| 98 mm |
| 27.4 mm |
| 89.3 mm |
| 0.20 kg |
| 0 to 55 degC |
| -25 to 75 degC |
| 5 to 95% RH (non-condensing) |
| Meets JIS B 3502, IEC 61131-2 (9.8 m/s2 intermittent, 4.9 m/s2 continuous) |
| Meets JIS B 3502, IEC 61131-2 (147 m/s2, 3 times in X, Y, and Z axes) |
Global Express Shipping
Returns & Warranty

Engineers seeking fast execution cycle times and high-density memory allocations rely on the Mitsubishi Electric Q12HCPU to manage complex automated control structures. This high-performance PLC CPU module belongs to the widely deployed MELSEC-Q Series, engineered to deliver swift logic processing and versatile data handling for demanding industrial environments. The controller supports multiple programming paradigms, including structured function charts (SFC), function blocks, and structured text, permitting highly modular program architecture.
With an extensive capacity of 124K steps and a dedicated program memory of 496 KB, the Q12HCPU easily accommodates complex algorithms and large-scale device mapping. The module features robust sequence processing, enabling high-speed operations like LD instruction execution in just 34 ns. This makes it an ideal central controller for high-throughput factory automation, municipal water systems, and heavy industrial assembly lines.
| Mitsubishi Electric |
| Q12HCPU |
| MELSEC-Q Series |
| Stored program iteration operation |
| Refresh method (Direct access I/O possible) |
| 124K steps (496 KB) |
| 34 ns |
| 102 ns |
| 256 KB |
| 496 KB |
| 4096 points |
| 8192 points |
| 0.64 A |
| 98 mm |
| 27.4 mm |
| 89.3 mm |
| 0.20 kg |
| 0 to 55 degC |
| -25 to 75 degC |
| 5 to 95% RH (non-condensing) |
| Meets JIS B 3502, IEC 61131-2 (9.8 m/s2 intermittent, 4.9 m/s2 continuous) |
| Meets JIS B 3502, IEC 61131-2 (147 m/s2, 3 times in X, Y, and Z axes) |
Global Express Shipping
Returns & Warranty
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| Country of origin |
United States
|