Can anyone determine if it\'s on ot off going by event 2, 4, and 5? Or can some

Question

Can anyone determine if it's on ot off going by event 2, 4, and 5? Or can some verify if mine are correct for the most part???

Name Date CHAPTER 7 PROBLEMS With reference to figure 7-37, prob. 1a, indica for the following events. Event ii: PL1 Event iv: PL1 te the status of each light Event v: a. With reference to the relay schematic diagram in Rel Figure 7-37, state the status of each light (on or off) after each of the following sequential events i. Power is first applied and switch S1 is open. ii. Switch SI has just closed. iii. Switch S1 has been closed for 5s iv. Switch S1 has just opened. v. Switch S1 has been opened for 5 s b. Design a PLC program and prepare a typical VO connection diagram and ladder logic program that will execute this hardwired control circuit correctly. Design a PLC program and prepare a typical 1/C connection diagram and ladder logic program that will correctly execute the hardwired relay control 1.38

Explanation / Answer

Answer:-

1. Event i is correct .

2. In Event iv PL3 will be off when switch s1 is just opened because The load connected to the normally closed contact will be on before the timer coil is energized. Once the timer coil has been energized the contact will immediately go open causing the load to turn off and remain off until the coil has been de-energized and the preset time has elapsed.

Secondly PL4 will be ON as When the timer coil is energized the contact will immediately close turning on the load connected to the contact. The load will stay on after the timer coil has been de-energized until the pre-set time equals the elapsed time then the load will turn off.

3.Event V is absolutely correct .!!

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