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Search: Posts Made By: drbitboy
Forum: LIVE PLC Questions And Answers Yesterday, 12:56 PM
Replies: 32
Views: 1,153
Posted By drbitboy
The bi-valued peaks in the histogram below the...

The bi-valued peaks in the histogram below the suggest yet another approach; I am pretty sure the code to use this could be done on the fly i.e. make the calculations as the data accumulate; it...
Forum: LIVE PLC Questions And Answers Yesterday, 09:45 AM
Replies: 7
Views: 299
Posted By drbitboy
Hmm, the bridge does have an "AT Command Mode,"...

Hmm, the bridge does have an "AT Command Mode," which is probably for communicating with a dial-up modem to connect to the serial device, but it appears that would not be accessible from the PLC.
...
Forum: LIVE PLC Questions And Answers July 2nd, 2022, 05:07 PM
Replies: 32
Views: 1,153
Posted By drbitboy
P.P.P.S. Update the repo again. The...

P.P.P.S. Update the repo again.

The emulator now flips the bit to trigger the input map routine to receive raw load cell data as integers from the emulator when needed, and also flips the bit at...
Forum: LIVE PLC Questions And Answers July 2nd, 2022, 05:01 PM
Replies: 7
Views: 299
Posted By drbitboy
I agree with Corsair and Ken Roach. OP needs to...

I agree with Corsair and Ken Roach. OP needs to send the characters in the HACH command protocol (c, e, A, etc.), and also parse the responses.

The HACH 2200 PCX manual (here...
Forum: LIVE PLC Questions And Answers July 2nd, 2022, 07:20 AM
Replies: 32
Views: 1,153
Posted By drbitboy
Thank you for the kind words. It did not take...

Thank you for the kind words. It did not take that long; this ain't my first rodeo ;).
Forum: LIVE PLC Questions And Answers July 2nd, 2022, 07:04 AM
Replies: 32
Views: 1,153
Posted By drbitboy
That Github repo has been updated: Added...

That Github repo has been updated:


Added a load cell data emulation routine in Python to detect when the training routine is ready (i.e. every 100ms) for the next load cell value and send the...
Forum: LIVE PLC Questions And Answers July 1st, 2022, 07:24 PM
Replies: 14
Views: 398
Posted By drbitboy
Additional comment: in ladder logic, the...

Additional comment:


in ladder logic, the scan cycle ensures that every rung is executed at least 10 times per second*.
That being the case, a JMP backwards to an earlier rung is almost never...
Forum: LIVE PLC Questions And Answers July 1st, 2022, 07:07 PM
Replies: 14
Views: 398
Posted By drbitboy
@Astleas: step back a bit.Axiom 1: I can say...

@Astleas: step back a bit.Axiom 1: I can say with 100% confidence that, unless there is something broken in that unit, the PLC is doing exactly what you told (programmed) it to do.
Assume for the...
Forum: LIVE PLC Questions And Answers July 1st, 2022, 12:38 PM
Replies: 17
Views: 570
Posted By drbitboy
+1

+1
Forum: LIVE PLC Questions And Answers July 1st, 2022, 12:27 PM
Replies: 32
Views: 1,153
Posted By drbitboy
P.P.S. that algorithm is best implemented using...

P.P.S. that algorithm is best implemented using LREALs; REALs may not have enough bits.
Forum: LIVE PLC Questions And Answers July 1st, 2022, 11:57 AM
Replies: 32
Views: 1,153
Posted By drbitboy
P.S. I just realized the incremental nature of...

P.S. I just realized the incremental nature of that filtered "calmness" approach means you would not have to deal with arrays, min, max, etc. at all: everything it needs can be calculated on the fly...
Forum: LIVE PLC Questions And Answers July 1st, 2022, 11:42 AM
Replies: 32
Views: 1,153
Posted By drbitboy
Yes, some assembly required, and it's not Python,...

Yes, some assembly required, and it's not Python, eh ;)? You should find this easier to do in Structured Text. The origin story of PLC comes from relay logic; the handling of multi-bit quantities is...
Forum: LIVE PLC Questions And Answers June 30th, 2022, 05:37 PM
Replies: 32
Views: 1,153
Posted By drbitboy
There is also a calculation called an...

There is also a calculation called an "outlier-resistant mean" or "robust mean" that is used to identify outliers (e.g. those spikes). For example see here...
Forum: LIVE PLC Questions And Answers June 30th, 2022, 05:20 PM
Replies: 32
Views: 1,153
Posted By drbitboy
It looks like after the trainer stops pushing...

It looks like after the trainer stops pushing that it returns to the original value.

So train mode could comprise several steps:


Step 1: start training and do not touch it for 5s

those...
Forum: LIVE PLC Questions And Answers June 30th, 2022, 02:00 AM
Replies: 32
Views: 1,153
Posted By drbitboy
Like Peter, I still don't understand the...

Like Peter, I still don't understand the rationale, but if the data are normally distributed, you could calculate a running average and a running standard deviation, and estimate your max/min spread...
Forum: LIVE PLC Questions And Answers June 29th, 2022, 01:36 PM
Replies: 15
Views: 1,009
Posted By drbitboy
yes, that sounds like the solution, especially if...

yes, that sounds like the solution, especially if they are on separate LANs.



you could also put a second ethernet card (module) into one compactlogix and connect it to the other LAN, but a...
Forum: LIVE PLC Questions And Answers June 29th, 2022, 01:33 PM
Replies: 14
Views: 385
Posted By drbitboy
Does something like Pycomm3 handle implicit...

Does something like Pycomm3 handle implicit messaging? It would be a Rube-Goldberg, but perhaps an intermediate system could transfer the data between the G3 and the Micro820, although by the time...
Forum: LIVE PLC Questions And Answers June 29th, 2022, 11:52 AM
Replies: 14
Views: 385
Posted By drbitboy
Class 3 is explicit messaging, right? So the...

Class 3 is explicit messaging, right?

So the Micro800 manual is wrong about what MSG_CIPGENERIC can do?
Forum: LIVE PLC Questions And Answers June 29th, 2022, 11:32 AM
Replies: 32
Views: 1,153
Posted By drbitboy
:bow::lolis:

:bow::lolis:
Forum: LIVE PLC Questions And Answers June 29th, 2022, 11:24 AM
Replies: 32
Views: 1,153
Posted By drbitboy
This:COP array[1] array[0] 599 And insert new...

This:COP array[1] array[0] 599
And insert new values at offset array[599]; it saves one COP, but you would have to keep track of the decreasing tail i.e. decrement an INT from 599 to 0.

You...
Forum: LIVE PLC Questions And Answers June 29th, 2022, 11:16 AM
Replies: 14
Views: 385
Posted By drbitboy
Wow, you only get one protocol based on the...

Wow, you only get one protocol based on the version you purchase?


What's up with that?


Also with this ;):
62385
Forum: LIVE PLC Questions And Answers June 29th, 2022, 10:59 AM
Replies: 14
Views: 385
Posted By drbitboy
Does it have Modbus?

Does it have Modbus?
Forum: LIVE PLC Questions And Answers June 29th, 2022, 10:37 AM
Replies: 32
Views: 1,153
Posted By drbitboy
That looks pretty good. @Aardwizz raises a...

That looks pretty good.

@Aardwizz raises a good point about stopping the CTU, which you could do by putting the [MOV 0 LocalMax] and an [XIO Saimple_to_take2.DN] before the CTU, so the CTU would...
Forum: LIVE PLC Questions And Answers June 29th, 2022, 09:09 AM
Replies: 6
Views: 502
Posted By drbitboy
I don't think I am saying anything you don't...

I don't think I am saying anything you don't already know: unless Stratix has a "use DHCP table's IP assignment for these four known MAC addresses, for unknown MAC addresses assign IP address by...
Forum: LIVE PLC Questions And Answers June 27th, 2022, 05:18 PM
Replies: 3
Views: 298
Posted By drbitboy
LOL! Syntax is everything.

LOL!


Syntax is everything.
Showing results 1 to 25 of 500

 
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