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Search: Posts Made By: drbitboy
Forum: LIVE PLC Questions And Answers January 12th, 2022, 07:06 PM
Replies: 18
Views: 3,402
Posted By drbitboy
Watch this series by Ron Beaufort: ...

Watch this series by Ron Beaufort:
https://www.youtube.com/watch?v=T3tnXu-Eywc&list=PLB1ACAF773A15BFB1
and read about these patterns:...
Forum: LIVE PLC Questions And Answers January 12th, 2022, 03:15 PM
Replies: 18
Views: 3,402
Posted By drbitboy
I know it's academic now, but I think I got it...

I know it's academic now, but I think I got it down to seven blocks:

60637
Forum: LIVE PLC Questions And Answers January 11th, 2022, 08:03 PM
Replies: 18
Views: 3,402
Posted By drbitboy
Glad to help. Here it is in ladder, with a...

Glad to help.

Here it is in ladder, with a few extra twists.

P.S. well done, you fixed your code yourself, which code was almost working. It is very difficult to learn a new language like...
Forum: LIVE PLC Questions And Answers January 11th, 2022, 06:45 PM
Replies: 18
Views: 3,402
Posted By drbitboy
I think that is as it should be; in the OP it...

I think that is as it should be; in the OP it said that the Stop Switch should stop the process and specifically called out Q1, Q3, and Q4, but did not call out Q2 or Q5.


Q2 and Q5 indicate...
Forum: LIVE PLC Questions And Answers January 11th, 2022, 06:43 PM
Replies: 18
Views: 3,402
Posted By drbitboy
Yes, my code blows off the Q2/Q5 outputs; those...

Yes, my code blows off the Q2/Q5 outputs; those are only indicators ;)
Forum: LIVE PLC Questions And Answers January 11th, 2022, 06:39 PM
Replies: 18
Views: 3,402
Posted By drbitboy
Whoops, B006 is the wrong kind of timer; it...

Whoops, B006 is the wrong kind of timer; it should be the edge-tirggered wiping relay
Forum: LIVE PLC Questions And Answers January 11th, 2022, 03:23 PM
Replies: 18
Views: 3,402
Posted By drbitboy
Reduce it by one more block, assuming the...

Reduce it by one more block, assuming the Fill/Mix/Empty sequence should repeat automatically once the process has been started with [I1 Start switch].

Also, B008 may not be necessary, if the [I2...
Forum: LIVE PLC Questions And Answers January 11th, 2022, 12:22 PM
Replies: 18
Views: 3,402
Posted By drbitboy
Also, here is a similar approach, it's basically...

Also, here is a similar approach, it's basically the same thing, but saves one block by using only a single pulse generator for both filling and emptying.

60623
Forum: LIVE PLC Questions And Answers January 11th, 2022, 12:15 PM
Replies: 18
Views: 3,402
Posted By drbitboy
I am starting to read the LOGO! syntax better, so...

I am starting to read the LOGO! syntax better, so I looked at the OP code again. It was very close, only two things needed fixing:


Invert the input connection into B007 from B009 output, so...
Forum: LIVE PLC Questions And Answers January 11th, 2022, 09:56 AM
Replies: 18
Views: 3,402
Posted By drbitboy
I just re-read the OP, I did not notice there an...

I just re-read the OP, I did not notice there an input, I3, that indicates a low level, presumably that is a level switch. I was wondering about that, because counting filling flowmeter pulses up...
Forum: LIVE PLC Questions And Answers January 11th, 2022, 02:00 AM
Replies: 18
Views: 3,402
Posted By drbitboy
Possible solution, but there is a problem if the...

Possible solution, but there is a problem if the system is reset (e.g. I2 Stop pressed) while the counter output (Q) is 1, because the next time I1 Start is pressed, there can be no rising edge to...
Forum: LIVE PLC Questions And Answers January 10th, 2022, 07:48 PM
Replies: 18
Views: 3,402
Posted By drbitboy
This could be done with ladder easily enough, but...

This could be done with ladder easily enough, but the principles should be the same.

Inputs


Start (momentary)
Stop (momentary?)
Flow pulses (not sure if they are needed, if there are...
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