"Without electricity, the meter has been turning. This is your home's 'power consumption' - standby appliances are doing it." Yesterday, the Guiyang Power Supply Bureau released a “Special Tip for Saving Electricity†at the site of the energy conservation publicity consultation activity. According to reports, the energy consumption of standby appliances refers to TVs, washing machines and other appliances connected to the power supply and waiting
The first Programmable Logic Controllers were designed and developed by Modicon as a relay re-placer for GM and Landis
These controllers eliminated the need for rewiring and adding additional hardware for each new configuration of logic.
The new system drastically increased the functionality of the controls while reducing the cabinet space that housed the logic.
The first PLC, model 084, was invented by Dick Morley in 1969.The first commercial successful PLC, the 184, was introduced in 1973 which was designed by Michael Greenberg.
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