Programmable Logic Controller – PLC
An industrial computer that has been fully capable and optimized for the control of manufacturing processes, such as assembly lines, machines, robotic devices, or any activity that requires high reliability, simplicity in programming, and process fault diagnosis is known as a programmable logic controller or programmable controller.
Types of PLC’s
- Fixed ( Integrated or Compact) PLC
- Modular PLC
Fixed ( Integrated or Compact) PLC
Actually, Fixed I/O stands for Fixed “Input/Output”. The microcontroller itself contains both the PLC’s input and output parts.
The manufacturer determines and fixes every form of output or input.
Additionally, this form of PLC might not be able to increase the number of inputs and outputs.
Modular PLC
It Allows multiple expansions of the PLC system through the use of modules.
Due to the independence of each component, modules usually make it simpler to use the programmable logic controller and provide more functionality like more I/O units.
The modular PLC is the preferred type of PLC, especially for big industrial systems that require the input or control of several devices.
Benefits
Scalability because you can always add modules again and again.
Number of I/O
Quick Fault Detection becuase of separated functions
Downtime reduction through quicker troubleshooting and repair.
What is the difference between PLC and Scada
The technology is the main distinction between a PLC and SCADA. For instance, whereas SCADA is software, a PLC is real hardware. This means that, in contrast to SCADA, which operates on a computer system and is similar to an operating system, such as Windows, a PLC may be picked up and physically inspected.
As SCADA can track and gather data from every system output, it is intended to function on a much larger scale. On the other hand, a PLC will just pay attention to monitoring one component of the system.
Because these technologies are so diverse, it’s tempting to imagine that PLC and SCADA aren’t connected. The connection between the two technologies is important, though. PLCs and SCADA are both employed in the same industrial setting.
This indicates that the two cooperate to support a plant’s safe and efficient functioning. SCADA can be viewed as the extensive software framework that underpins the entire system. PLCs work inside the framework that SCADA manages.
While the SCADA depends on the data gathered by the PLCs to function properly, the PLCs need SCADA in order to govern their functioning.
If a system is keeping an eye on a piece of equipment, the PLC might extract data that indicates excessive vibration. The SCADA software will examine the readout data after receiving it from the PLC and determine whether any changes to the system’s operation are necessary. When a change is required, SCADA will relay the necessary instructions to the PLCs, who will then make the change possible.
What is the difference between PLC and HMI
PLC (Programmable Logic Controller) and HMI (Human Machine Interface) are both important components of industrial automation systems, but they serve different functions.
PLC is a specialized industrial computer that is programmed to control and automate various industrial processes. It can receive input signals from sensors and other devices, process the information, and then output control signals to control the operation of machines and equipment. PLCs are designed to be rugged, reliable, and operate in harsh industrial environments.
On the other hand, HMI is an interface that allows operators to monitor and interact with a machine or process. It provides a visual display of the status of machines and equipment, and allows operators to adjust settings, enter data, and perform other tasks. HMIs can be used to visualize the real-time data collected by PLCs, as well as to configure and program them.
In summary, PLCs are responsible for controlling industrial processes and are programmed to perform specific tasks, while HMIs provide operators with a visual interface to monitor and interact with the machines and equipment controlled by the PLC
