A temperature control system consist of four thermostats controlling three heating units. The thermostat contacts are set to close at 50, 60, 70 and 80 degrees Fahrenheit, respectively
A temperature control system consist of four thermostats controlling
three heating units. The thermostat contacts are set to close at 50, 60,
70 and 80 degrees Fahrenheit, respectively. The PLC ladder logic
program is to designed so that a temperature below 50 degree F, three
heaters are be to be on. Between 50 60 60 degree F two heater are to be
on. For 60 to 70 degree F, one heater is to be on. Above 80 degree F,
there is a safety shutoff for all three heaters in case one stays on
because of malfunction. A master switch is to be used to turn the system
on and off. Prepare a typical PLC program for this control process.
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