In this video, Zahraa Khalil explains the main components of PLC—Power supply, Controller CPU I/O system, and PLC programming software— and explains the different operation modes within PLC.
- [Instructor] The main components of a PLC system are…power supply; controller CPU; I/O system,…inputs and outputs; and PLC programming software.…Most PLCs need one or more power supplies…for the CPU and sometimes for the inputs and outputs.…Usually all the PLC manufacturers…make a compatible power supply for their PLC.…Controller, or Central Processing Unit, CPU,…is the brain of the PLC.…
The CPU reads signals and follows the instruction…that a programmer has stored in the PLC memory.…According to the program,…the PLC turns certain outputs or field devices.…The CPU has different operating modes,…programming and a run mode,…and usually has LEDs or screen showing…on the controller module within the PLC…to show what mode is the PLC currently operating.…In a programming mode, the CPU accepts and downloads…logic from the PC.…
The CPU is then placed in a run mode…so that it can execute the program and operates the process.…I/O system includes the inputs and outputs for the PLC.…Input section is connected to field devices…
Learn about the components and networks involved at each level of automation: field level, control level, and management level. Explore the different devices involved, from the programmable logic controllers (PLCs) on the factory floor, to OPC software that give technicians insights into operations. Instructor Zahraa Khalil, an engineer and educator, also provides an overview of SCADA (supervisory control and data acquisition), an industrial control system architecture that enables supervision over large distances and multiple sites.
- Overview of industrial automation
- Field level
- Communication level
- Management level
- PLC programming
- OPC software