A(n) __________ diagram lets you determine how the machine action affects the PLC inputs and how the PLC outputs affect the machine action.

The correct answer is a diagram that is instrumental in analyzing the interactions between machine actions and PLC (Programmable Logic Controller) inputs, as well as how the PLC outputs influence machine actions. In this context, a Power diagram, often referenced in automation and control engineering, illustrates the electrical relationships and connections within the system.

This type of diagram emphasizes the flow of electrical power to and from various components, including sensors, actuators, and other devices linked to the PLC. By examining a Power diagram, one can easily trace how changes in machine action—like initiating a motor or activating a valve—correspond to variations in the PLC's input status and how those outputs are manifested in the machinery working on the floor.

Establishing these relationships is crucial for troubleshooting and system design, as it allows engineers and technicians to pinpoint where failures may occur or how system modifications will impact overall performance. In a training or examination setting related to programmable controller systems, understanding this fundamental relationship is key for designing, maintaining, and optimizing industrial automation systems.