Hello, im taking an introduction to PLC..and i'm having a hard time on creating a program for 2 lamps blinking alternately with this button characteristics: 1.) One push button (starts upon pressing) 2.) Same push button (when pressed again, will pause the system) 3.) Same push button (when pressed again, will continue the paused system) 4.) Same push button (when pressed within 2 seconds, will shut off the system) Pls..i know this is just a simple problem for you guys..

2 Answers  

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what is the disadvantages of common earthing for AC and DC equipment? (i am talking about inverter control room and inverter duty transformer earthing is common...?)

0 Answers   TATA,

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sir, What is the purpose in Generating power plant is operated Lagging PF and Above 0.9 lag PF?

3 Answers  

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What happens if the capacitive reactance of a transmission line is very high?

5 Answers   ABB, Power Grid,

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why name plate detail HP/KW rating of a motor is different from measured value HP/KW using formula?

1 Answers   MAHINDRA,

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I have a 5KVA UPS. Total load to be connected almost 3KW. Ordering a battery pack with capacity of 1920VAh. How long will the backup time be?

1 Answers  

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What is third harmonic?what is the effect of it?

0 Answers   GMR,

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an amazing situation was faced when an alive distribution panel with 415 volts and carrying almost 200Amps has become short and this metal cubical showing 220 volts against neutral and earth. to redress any confusion i checked the panel with help of single 200watts test lamp which also glowing with max.intensity b/w neutral & metal body of DB. amazing situation is that i hold the DB firmly more than once with necked foot means without insulated shoes but not received any electrical shock. whereas our all running gen sets neutral points also proper grounded and this short DB was completely earthed , this is beyond my understanding . any body explain how is it possible . our running gen set neutral also grounded firmly

1 Answers  

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what is the role of transistor in Circuit?

0 Answers  

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What are the specific gravity of fully charged and fully discharged lead-acid battery?

1 Answers   Mukand,

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what will happen when choke in tube light circuit was not working???

7 Answers  

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Can any body explain the operation system of MVWS(May be related to water and fire hydraunt system)?

2 Answers   TATA,

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