2. With reference to the ladder logic of the CLx di verter gate program (Figure

Question

2. With reference to the ladder logic of the CLx di verter gate program (Figure 15-53), assume the solenoid gate fails to energize as programmed. You suspect the problem is due to an open in the solenoid coil or wiring to it. How might observation of the so- lenoid output status light help confirm this? 3. You are required to extend the Green light-on time of the CLX traffic control program (Figure 15-55) to 40 seconds. What changes would have to be made to the program? 4. With reference to the CLX heating oven process pro- gram (Figure 15-59), assume the oven-on pilot light burns out. In what way would the operation of the program be affected?

Explanation / Answer

2- By chcking the status light, the off light will be on if there ia a problem in the wiring of solenoid, no status light will be working, either on or off both will not work.

3- you have not provided the firgure 15.55 but according to question, you can increase the time of on delay timer which is used to stop the green light.

4- If only the indicator light of oven on burns , then the program will not be affected. Just the indicator will not work. If the relay of pilot light of oven burns then the whole program will stop.

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