In a relay logic application, what is the purpose of the OTU instruction?

The OTU (Output Unlatch) instruction is specifically designed to unlatch a relay in relay logic applications. When the OTU instruction is executed, it sets the output associated with a specific relay to an off or deactivated state, effectively releasing the relay and stopping its function in the control circuit.

This behavior is crucial in applications where controlling the state of relays is essential for the overall operation of the system. When a relay needs to be turned off after being energized (or latched), the OTU instruction ensures that this transition occurs, allowing for proper control of devices or processes that rely on relay logic.

Understanding this distinct role of the OTU instruction is fundamental in troubleshooting and designing control systems, as it provides a clear mechanism for manipulating the state of relays, ensuring they operate as intended in the automation control processes.