The difference between SCADA and PLC:

The types of technology are different: PLC is a physical piece of hardware, while SCADA is software.

Different functions: PLC is mainly used to read the hardware of the sensor and install the programmable logic controller to monitor the sensor, as well as trigger the output when the parameters programmed into the system are met and need to be generated in response to input conditions within a limited time to achieve Continuous normal operation. While SCADA is used to display graphics and provide operator access to set parameters so that the operator can operate and control variables written into the PLC, SCADA has a much larger scope than PLC and can control the entire system, collect data from all inputs, and Monitor all devices.

Different ways of use: Although PLC and SCADA are used in the same industrial environment in factories, SCADA can be seen as a broad software structure that supports the system, while PLC is a part of the system supervised by SCADA. PLC requires SCADA to control its functions, but SCADA relies on PLC data to complete its overview.

Application Scenarios: Both are used to monitor and control process automation equipment in many different industries like telecommunications, water and waste control, energy, oil and gas, transportation, etc. But SCADA provides more than PLC with the help of multiple components Great features.