Coil-type and box-type instructions in PLC programs are examples of what type of instructions?

Coil-type and box-type instructions are considered output instructions in PLC programming. These types of instructions function to control the outputs of the PLC, allowing it to energize or de-energize actuators, relays, or other devices in an automated system.

In the context of ladder logic programming, a coil instruction represents a digital output that can be turned on (energized) or off (de-energized) based on the evaluation of the conditions or logic leading up to the coil. The box-type instructions often serve a similar purpose within a different programming paradigm or visual representation but ultimately share the goal of representing output operations.

Recognition of these instructions as output is crucial for understanding how PLCs interact with the physical world, as they are fundamental for controlling machinery, lighting, and other hardware elements in industrial automation.