PLC's are commonly used for:

Programmable Logic Controllers (PLCs) are widely utilized in industrial automation for their versatility and reliability in managing various tasks. Their primary function is to execute control operations based on input signals from sensors, which then influences output actions such as activating motors or controlling valves.

Conveyor sequencing is a perfect example of a task that can be efficiently managed by a PLC. In a manufacturing or processing environment, a PLC can coordinate multiple conveyor systems to operate in harmony, directing the flow of products, managing speed changes, and facilitating the timing of operations. This ensures that products are transported smoothly through different stages of production, which enhances efficiency and reduces the likelihood of errors.

While limit switches, temperature readings, and boiler safety systems could involve electronic systems, they do not fully capture the operational capabilities and primary use of PLCs. Limit switches primarily act as sensors for detecting the position of mechanical elements, temperature readings usually come from specific sensors that may not require a PLC, and while PLCs can be used in boiler safety systems, these systems often rely on dedicated safety controllers for critical fail-safe operations. In contrast, conveyor sequencing directly highlights the advanced programming and task management capabilities of PLCs, making it the most fitting option in this context.