To Buy Programmable Logic Controller (PLC) in Bangladesh at HONG ENGINEERING LTD The PLCs were first developed in the automobile manufacturing industry to provide flexibility. A PROGRAMMABLE LOGIC CONTROLLER (PLC) is an industrial computer control system that continuously monitors the state of input devices and makes decisions based upon a custom program to control the state of output devices. The programmable logic controller (PLC) or programmable controller it is an industrial controlling device that is control of manufacturing processes, machines, robotic control with automation controlling on the every sector, EEPROM (electrically erasable programmable read-only memory) storage the program module and process fault diagnosis, with very eligible cycle time or real time of machine/controlling