PLC or the Programmable Logic Controller is a ruggedized computer which is used for industrial automation. These controllers have the capability of automating a specific process, machine function, or even an entire production line. A PLC receives information from the connected sensors or input devices and then processes the data & triggers outputs on the basis of pre-programmed parameters.

Depending on the inputs & outputs, a PLC can monitor & record run-time data like machine productivity or operating temperature; it can automatically start & stop processes, and generate alarms if there are machine malfunctions, & more.

Here are the most significant advantages of using PLC or a Programmable Logic Controller:

Reduced Space

Programmable Logic Controllers are completely solid-state devices, and they are extremely compact in comparison to the hard-wired controller where there is a need to use electromechanical devices.

Higher Life & Reliability

These devices are extremely rugged in nature. So, the chances of defect or damage are very less as there are very lesser moving mechanisms involved here.

Economical

Since the defect probability is very less, one can consider PLC as a one-time investment. In this way, Programmable Logic Controllers are undoubtedly the most economical systems to use. Also, the cost of PLC recovers within a short period.

Energy Saving

The average amount of power consumed by PLCs is just 1/10th of the power consumed by an equivalent relay-based control.

Ease of Maintenance

PLC comes with the ease of replacement because of the features like:

• Easy troubleshooting
• Modular replacement
• Error diagnostics with programming unit.

Tremendous Flexibility

You don’t have to rewire it again if there is a need to implement any change. A PLC can carry out complex functions just like arithmetic operations, counting, comparing, generation of time delay, etc. Also, it has a very high processing speed & greater flexibility in both the analog & digital process. Additionally, there is a possibility of “On-Line”/ ‘Off-Line’ programming.

Shorter Project Time

The hard-wired control system can be constructed only when the task is fully defined. However, In the case of Programmable Logic Controller, the construction of the controller & wiring is completely independent of the control program definition.

Easier Storage Archiving & Documentation

Since PLCs are compatible with PC-AT, Printer, and Floppy disk, it brings in the advantage of easier storage archiving & documentation.