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.
Executing precise motion profiles across multiple independent axes, the QD70P8 serves as a high-density positioning module for the MELSEC-Q Series PLC platform. This module supports up to 8 axes of pulse-train control, enabling seamless integration with stepper motors and servo drives. Designed for centralized motion tasks, it offloads intensive positioning calculations from the main CPU, ensuring rapid system response times and highly synchronized multi-axis operations.
The module communicates directly via the Q-series base unit backplane, facilitating high-speed data transfer and simplifying system architecture. Typical operations include point-to-point positioning, speed-torque control transitions, and absolute or incremental motion profiles. By utilizing dedicated external I/O signals, the QD70P8 maintains robust control loop integrity and simplifies wiring requirements in high-density automation panels.
| Manufacturer | Mitsubishi Electric |
| Part Number / Model | QD70P8 |
| Series | MELSEC-Q Series |
| Module Type | Multi-Axis Positioning Module |
| Number of Control Axes | 8 axes |
| Command Output Interface | Open collector output (pulse train) |
| Maximum Output Pulse Rate | 200 kpps |
| Connection Type | 40-pin connector |
| System Backplane Slot Occupancy | 1 single-slot module |
| Interface Type | Function / Connection Target |
|---|---|
| 40-Pin External Connector | Interface to external servo amplifiers, stepper drives, limit switches, and stop signals. |
| System Backplane Interface | Direct high-speed bus communication with the MELSEC-Q PLC CPU. |
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Returns & Warranty

Executing precise motion profiles across multiple independent axes, the QD70P8 serves as a high-density positioning module for the MELSEC-Q Series PLC platform. This module supports up to 8 axes of pulse-train control, enabling seamless integration with stepper motors and servo drives. Designed for centralized motion tasks, it offloads intensive positioning calculations from the main CPU, ensuring rapid system response times and highly synchronized multi-axis operations.
The module communicates directly via the Q-series base unit backplane, facilitating high-speed data transfer and simplifying system architecture. Typical operations include point-to-point positioning, speed-torque control transitions, and absolute or incremental motion profiles. By utilizing dedicated external I/O signals, the QD70P8 maintains robust control loop integrity and simplifies wiring requirements in high-density automation panels.
| Manufacturer | Mitsubishi Electric |
| Part Number / Model | QD70P8 |
| Series | MELSEC-Q Series |
| Module Type | Multi-Axis Positioning Module |
| Number of Control Axes | 8 axes |
| Command Output Interface | Open collector output (pulse train) |
| Maximum Output Pulse Rate | 200 kpps |
| Connection Type | 40-pin connector |
| System Backplane Slot Occupancy | 1 single-slot module |
| Interface Type | Function / Connection Target |
|---|---|
| 40-Pin External Connector | Interface to external servo amplifiers, stepper drives, limit switches, and stop signals. |
| System Backplane Interface | Direct high-speed bus communication with the MELSEC-Q PLC CPU. |
Global Express Shipping
Returns & Warranty
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| Country of origin |
United States
|