Need to build this

[demsy11 0]

3 It has been decided to introduce a Programmable Controller into a manufacturing plant to control a three phase induction motor via an autotransformer in order to reduce high starting currents. It is required to include an alarm circuit which is to give an audible and visual alarm when the motor is overloaded. A momentary actuated Reset push button is to be included in the alarm circuit which will turn off the audible alarm but leave the overload lamp on until the motor overload is reset. Once the motor overload is reset the overload lamp is to be de-activated. The conventional relay circuit diagram for this starter is shown below. A single Stop/Start push button control station is required to initiate the following motor control sequence. a. Motor 1 turns on the instant the start push button is operated; b. Motor 2 turns on 10 seconds after Motor 1 starts; c. Motor 3 turns on 15 seconds after Motor 2 starts; d. Motor 3 turns off after running for six seconds; e. Motor 2 turns off 6 seconds after Motor 3 stops; f. Motor 1 turns off 3 seconds after Motor 2 stops. If the Stop push button is operated, or a thermal overload from any motor is tripped, the whole system will shut down. Motor 1 will start the control sequence again next time the Start push button is pressed.

[b_carlton 61]

You did not attach the conventional relay circuit diagram. This sounds like a good assignment. If you would like to attach a zipped version of your PLC program please do so. You might wish to mention which particular PLC (we'll presume Allen Bradley) you are using.

[hboyer90 3]

Sounds exactly like a homework assignment I had to do in PLC class in college. What version of RSLogix are you running? RSLogix 5, 500 or 5000? And what type of PLC are you running? Micrologix, ContolLogix, CompactLogix, SLC, PLC5? Also, when you say "a single start/stop button" do you mean that there is 1 button that starts the sequence and another separate button that emergency stops everything, or is the start/ emergency stop button the same button? Answer these questions and I can whip something up for you. I can tell it's a homework assignment because you accidentally left the number "3" in front of your question. ;) Howard Edited 17 Sep 2015 by hboyer90

[b_carlton 61]

To hboyer90 - in case you haven't been on these forums long, we typically expect a student (this obviously being an assignment) to post what they have done so far with a statement of any problems they have encountered. We then usually answer the question with our own observations intending to stimulate thinking on the student's part rather than giving a complete answer. Your question on the Start/Stop button is good though given the ambiguous way it was described. Edited 17 Sep 2015 by b_carlton

[hboyer90 3]

Ah, gotcha. Ok.