Why PLCs are used in Industries? Basic advantages of using PLC

The use of PLCs in the industry has become a necessity, especially to replace the wiring system and relay system that is still used in the previous system. Users are preferring PLC because of the many advantages and benefits offered by this reprogrammed system. The advantages and benefits include:

Benefits of using PLC:


In old Relay systems each machine need their own control system. This is now resolved by using a PLC. Just using a PLC, many devices can be run with their own programs. The cabling system starts to be fixed and reduced, the fewer cables used and rated / simple. Do not need a lot of space to place it.

Low cost:

When the old system (relay) still uses a lot of cabling that takes a lot of cost, PLC offers simple cabling. Wiring can be done in large quantities only with a PLC, because the PLC includes relays, timers, counters, sequencers, and several functions that can be adjusted according to needs.

Number of Multiple Contacts:

The amount of contact that a PLC has provides a lot of convenience to users. Not only financially, but also the installation side. Will be much simpler and easier when compared to relays. For example, in PLC-5, a PLC produced by Allen Bradley with a minimum number of contacts of 16-32 contacts, while the relay provides 4-8 contacts.

Can Perform Programming, Reprogramming and Correction Easily:

PLC has the advantage that the system can be reprogrammed quickly, mixed production processes can be completed quickly. Even when the system is running.

If one of the systems will be changed or corrected, the changes will only be made to the programs on the computer, with a relatively short time, after which they are downloaded to the PLC.

If with a relay, it is necessary to change the wiring, the time will be very long and high risk so it must turn off the system that is running.

Simplifying Control System Components:

In the PLC there are also timers, counters, relays and other components, so they no longer need these components in addition. The use of relays requires a counter, timer or other components for enhancements.

Guaranteed security:

When viewed from the side of security, the PLC is classified as an extraordinarily safe device, in terms of documentation, devices and things about the program. PLC has a locking system, thus reducing and avoiding any form of theft.

Existence of Data Records and Interfaces that Facilitate Users:

PLC is designed to be able to store the data needed according to needs and programs. It’s easy with an interface that can display processes, data and comparisons into a computer device (PC) connected to the PLC.

The Latest System with Wireless:

The newest system from PLC is by offering wireless systems and can be accessed easily by users and remotely. No need to enter into a special office or room.

Faster System and Component Upgrades:

Users can add control components at any time and without the need for power as well as large costs such as conventional controllers (relays). It’s also easy with the components available in module packages, installation can be done quickly and easily.