Explain greater or equal (>=) instruction using example

Application:-Explain greater or equal instruction in the PLC. Write PLC program for explanation using ladder diagram language in the Programmable Logic Controller (PLC).

Components:-Programmable logic controller, HMI panel, wires, 24 VDC lamp, 24 VDC power source, 24VDC temperature controller.

 

Diagram:-

Explanation:-

Consider a simple temperature controller example for explanation of greater equal instruction in the PLC. Here we have taken simple HMI (Human Machine Interface) for display and programmable Logic Controller (PLC) for programming. Consider one temperature control which is displaying the temperature given by temperature sensor, here we haven’t considered analog signal calculation and scaling so we directly consider actual value in the PLC. Here if the actual temp value in the actual temp box is greater or equal than set temp, temperature indication will be ON.

If set temperature is 50 degree and temperature read by temperature controller is 50 0r 52 degree, lamp should be ON because 52 degree is greater than 50 degree.