![]() ![]() PLC manufacturers have programming software for their PLCs. The computer is connected to the PLC by Ethernet, RS-232, RS-485 or RS-422 cabling. A major advantage of using a computer is that the program can be stored on the hard disk or a CD and copies easily made. Personal computers are widely used for programming PLCs. ĭesktop consoles are likely to have a visual display unit with a full keyboard and screen display.Handheld programming devices will normally contains enough memory to allow the unit to retain programs while being carried from one place to another. Only when the program has been designed on the programming device and is ready is it transferred to the memory unit of the PLC. A programming device can be a handheld device, a desktop console, or a computer.
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