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PLC Configuration and Programming Essay Example

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PLC Configuration and Programming

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Cooling State: Refers to the stage wherein the cooling system is working similar to a hysteresis. Assuming that the actual temperature is higher than 27oC, the cooling system would automatically switch on. Assuming that the actual temperature is below 25oC, the cooling system would automatically switch off until such time that it reaches the neutral state.Assuming that the PLC has been made available online, the motor is expected to return back to its initialization state. It means that the machine would automatically reset the system back into its neutral state. It is under the neutral state wherein the machine would wait for the next input signal before it turns on either the heating or cooling element.Based on the figure presented above, notice that the “P_First_Cycle” switch run through the the “first cycle flag” of the processor before it reaches the “#8003” of the PLC. This procedure is necessary so that that the system can control the thermometer module in such a way that the CPU could regularly update and record the real-time temprature during each cycle. As such, it is during the initialization stage wherein the programmer should clearly set a specified range of temprature the machine should read. It will also serve as a benchmark on whether or not the system should automatically turn on the heating or cooling devices.Basically, the matching registered bits are initially set in the binary as it formally decodes the data in the hex value of “#8003”. Eventually, the said number would automatically be shifted down to its destination. Based on the figure presented above, the destination is the “word for 102”.The state of heating is similar to the way hystersis works. Each time the actual temperature is below 25oC, the heater automatically switches on. Likewise, each time the actual temperature is higher than 27oc, the heater automatically switches off.Each time the heating element is turned “ON”; the actual temperature is constantly being recorded and saved as a word file in its destination point “D0”. Eventually, the each temperature recorded in “D0” will be compared and contrast with the expected temperature of 25oC.Automatically, the heating state sets the signal “ON” each time the temperature is below 25oC. For instance, looking at the “12D” in hex, notice that the heater

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