What is Industrial Automation
PLC History
PLC (Programmable logic controller) came into existence in the late 60s. PLC was designed because the use of PLC was eliminating higher cost involved in replacing relay-based control systems. Changes in Industrial automation Control system are dependent on production requirements. When there are frequent changes in production requirements, it is a costly affair. Relays being mechanical devices have a limited lifespan. Relay-based control involves many relays into operation, troubleshooting becomes quite difficult when so many relays are involved.
What is a PLC (programmable logic controller)?
A PLC is a microprocessor-based electronic industrial computer which is used various machines and process control systems. It reads various conditions of input devices such as limit switches, push buttons, proximity / photoelectric sensors, float switches, pressure switches, implements the logic written in the software and updates the final control elements; relays, contactors, pilot lights, motor starters, actuators, solenoids, drives etc. which are called output devices.
Why use a PLC?
PLC is a system that is used for automation of various processes across industries. Why is automation of a manufacturing unit necessary? Industrial Automation helps process and manufacturing industry to:
• have control of their manufacturing plant
• Achieve consistent manufacturing
• Achieve higher quality
• Safety of personnel and equipment in hazardous environments
• Enhance productivity level
• Lower wastage of raw material, and lower time in rework
• Industrial automation offers multiple product varieties with ease.
• Easy migration from one product to the other
• Efficient inventory Control
How PLCs Know The Task Assigned to them?
PLC System follows the instructions stored in its memory for future use and reference. Each instruction entered is placed in PLC memory with the help of a computer and software. These set of instructions are written in certain order/guidelines called PLC Programming languages; FBD, Ladder language, SFC, IL etc. This is the language PLC Processor is made to understand. We at Sofcon India Pvt Ltd have various PLC SCADA training, PLC training, DCS Training courses. Ladder programs are developed using PLC software package with the help of a PC. The basic difference between a PC and a PLC System is PC is manufactured for office use whereas a PLC system is manufactured to be installed into industries. They can withstand harsh industrial environment; high temperature, dust, humidity. Ladder Logic program is developed by PLC Programmer, this program is them downloaded into processor’s memory. PLC Training helps in understanding how PLC programming software is to be developed in order to achieve desired process control.
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