What is the primary function of a programmable logic controller (PLC)?

A programmable logic controller (PLC) is primarily designed to automate industrial processes. Its core function is to receive input from various sensors and devices, process that information according to pre-programmed logic, and then produce outputs to control machinery and equipment. This enables it to manage tasks such as assembly line operations, manufacturing processes, and other applications where automation is critical for efficiency and precision.

While PLCs can be used in specific applications like controlling lighting systems, monitoring environmental conditions, or even indirectly assisting in financial transactions, these functions are typically outside their primary design purpose. The strength of a PLC lies in its capability to execute specific control tasks in dynamic environments, making it an integral component in industrial automation systems.