Programmable Logic Controller (PLC)
A Programmable Logic Controller (PLC) is an embedded programmable control device. PLCs typically utilize a modular architecture with separate modules used to support its processing capabilities, communication mediums, and I/O interfaces. PLCs allow for the deployment of customized programs/logic to control or monitor an operational process. This logic is defined using industry specific programming languages, such as IEC 61131 [1], which define the set of tasks and program organizational units (POUs) included in the device’s programs. PLCs also typically have distinct operating modes (e.g., Remote, Run, Program, Stop) which are used to determine when the device can be programmed or whether it should execute the custom logic.
Related Assets
| Name | Sectors | Description |
|---|---|---|
| Process Automation Controller (PAC) | General |
Process Automation Controllers (PAC) share much of the same functionality as a PLC. PACs may include advanced features for process control, motion control, drive control, and vision applications. PACs may include additional features such as options to program in traditional programming languages such as C and C++ in addition to 61131 programming languages in order to support these more advanced controls. |
| Field Device / Controller |
Programmable Logic Controller (PLC) may be referred to as Field Controllers or Field Devices as a general function name. |
