When it comes to 100 (psi), the engines are stopped and the pressure begins to decrease to a minimum of 30 (psi).ī) Mode B: the engine 1 to work for a certain range of pressure and the motor 2 start work for another range. Consider a range of pressure to both ends of the pool of 30-100 (psi). I was playing with the values to test it and for some reason when i took the screenshot it was set like that but in my assignment the values i got to use are 120 / 10 for the first motor and 120 11 for the second one.Automate the process requires dual compressor whose requirements are:Ī) Mode A: the two engines running at the same time with 50% flow. In that case, as long as the load stays high, I:1/2 will never become 1, and the same compressor will always come on first. Assuming the load is still high, the remaining compressor will not be able to get the system to 120. With the current logic, if the load is such that two compressors are required (as determined by the pressure continuing to drop to 98 after one compressor starts running at 100), then that PE2 high limit of 118 means the second compressor will turn off when I:1/3 becomes 1, which will happen before the system pressure rises to 120. So I:1/3 will become 1 when the pressure is above 118 I:1/3 will become 0 when the pressure is below 98 (=118-20) I:1/3 will not change otherwise. I thought of one more thing: a few posts ago you showed PE2 (I:1/3) parameters of high limit = 118 and span = 20.
Ill post again if i have any more questions. Ill start the Part 4 and see how it goes.
Oh okay! thank you and yes you can add comments in every rung! That would not change the behavior, but I think it will be a bit more clear that said, the inverted logic on the inputs might be confusing, so maybe change the names of I:1/2 and I:1/3 to something like and, respectively. Putting O:0/2 at the start of rungs 003 and 004,.You can get rid of Rungs 001 and 002, and also intermediate bits B3:0/2 and B3:0/4 by
I'm partial to the top two rungs of the image below. You might want to ask The Google about and see if there are any arrangements that are more clear. I would do the flip-flop (rung 005) a little differently, but that's just a style issue. I did some changes to the program and its working just fine, as it supposed to according to the exercise, is there anything wrong where you can help me to improve it?
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