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Search: Posts Made By: daba
Forum: LIVE PLC Questions And Answers February 25th, 2021, 10:05 PM
Replies: 9
Views: 496
Posted By daba
I would always use CPS over COP if the data is...

I would always use CPS over COP if the data is shared with another device, like an HMI or SCADA system, or even another controller as a produced tag.

COP can be interrupted, mid-processing, by the...
Forum: LIVE PLC Questions And Answers February 25th, 2021, 01:30 PM
Replies: 9
Views: 496
Posted By daba
You cannot use MOV with structured tags, you can...

You cannot use MOV with structured tags, you can only use MOV with SINT INT DINT or REAL sources and destinations. Data conversion from one type to another happens automatically.
Forum: LIVE PLC Questions And Answers February 18th, 2021, 07:18 PM
Replies: 32
Views: 1,564
Posted By daba
Oops, hadn't spotted that ... Perhaps we...

Oops, hadn't spotted that ...

Perhaps we need an AOI developed to do this ?


Logix500 processors (most of them) had an ENC instruction which would tell you the first bit set, but this was...
Forum: LIVE PLC Questions And Answers February 18th, 2021, 06:46 PM
Replies: 6
Views: 240
Posted By daba
Another candidate for a "sticky" - great post...

Another candidate for a "sticky" - great post !
Forum: LIVE PLC Questions And Answers February 18th, 2021, 06:34 PM
Replies: 32
Views: 1,564
Posted By daba
All looks good until the realisation that a DINT...

All looks good until the realisation that a DINT has only 31 data bits, numbered 0 to 30. Bit 31 is the SIGN bit of a DINT data-type.

So it makes a big difference depending on how the 32-bit...
Forum: LIVE PLC Questions And Answers February 18th, 2021, 06:22 PM
Replies: 11
Views: 27,820
Posted By daba
They foisted CodeMeter on us, we did not buy it,...

They foisted CodeMeter on us, we did not buy it, and it is related to software activation, so why is it access level TechConnect ? I thought activation issues were "free" support. ???
Forum: LIVE PLC Questions And Answers February 18th, 2021, 06:13 PM
Replies: 37
Views: 1,792
Posted By daba
I can see a correlation to book-binders, the...

I can see a correlation to book-binders, the couple of books I have do read top-to-bottom. But then I looked at my DVD collection, and about half read bottom-to-top, the others read top-to-bottom. ...
Forum: LIVE PLC Questions And Answers February 18th, 2021, 05:04 PM
Replies: 37
Views: 1,792
Posted By daba
Most natural for me is bottom-to-top, no issues...

Most natural for me is bottom-to-top, no issues with left-to-right. Although some say wires should be labelled working away from the termination ! That would have them upside-down 50% of the time,...
Forum: LIVE PLC Questions And Answers February 18th, 2021, 04:42 PM
Replies: 37
Views: 1,792
Posted By daba
I have seen wire retention done with nothing more...

I have seen wire retention done with nothing more than what looked liked strong cotton, very thin, but quite strong. Wrapped tightly around the trunking side splines, with some looseness across the...
Forum: LIVE PLC Questions And Answers February 16th, 2021, 07:55 PM
Replies: 37
Views: 1,792
Posted By daba
Disagree, a VFD is most likely not "heat...

Disagree, a VFD is most likely not "heat sensitive" by design, and it will almost certainly protect itself. Putting it in the bottom of the enclosure is just gonna add stress to the other inhabitants...
Forum: LIVE PLC Questions And Answers February 16th, 2021, 07:43 PM
Replies: 37
Views: 1,792
Posted By daba
Don't place the panel thermostat on the DIN rail...

Don't place the panel thermostat on the DIN rail next to a device that will keep it cosy, despite the outside temperature !!
Forum: LIVE PLC Questions And Answers February 16th, 2021, 07:26 PM
Replies: 32
Views: 1,564
Posted By daba
UGH !! Sequencers using bit logic ! Nooooooooo !!...

UGH !! Sequencers using bit logic ! Nooooooooo !!

Lose power, lose bits ! Noooooooo !!

One rule I have, if the processor restarts for any reason, nothing is lost. Of course we can detect a...
Forum: LIVE PLC Questions And Answers February 16th, 2021, 06:04 PM
Replies: 10
Views: 392
Posted By daba
So the developers concentrated on the little...

So the developers concentrated on the little things, and one of them forgot to look-up how the guy had got his ladder bit addressing set up ....

And quite frankly, I cannot see why you would want...
Forum: LIVE PLC Questions And Answers February 16th, 2021, 05:55 PM
Replies: 11
Views: 473
Posted By daba
It depends what you want to do with that array of...

It depends what you want to do with that array of BOOLs.

They don't lend themselves to much in the way of "manipulation", they just are what they are, and indexable array of BOOLs.

One day...
Forum: LIVE PLC Questions And Answers February 16th, 2021, 05:44 PM
Replies: 10
Views: 392
Posted By daba
The two functions were probably written by...

The two functions were probably written by different programmers who never managed to be in the same meetings ...

So both hedged their bets ..
Forum: LIVE PLC Questions And Answers February 16th, 2021, 04:12 PM
Replies: 11
Views: 473
Posted By daba
Quite correct, I said this exact same thing a...

Quite correct, I said this exact same thing a couple days ago on another thread.

If you ever see square brackets inside another set of square brackets, it won't compile, you cannot nest...
Forum: LIVE PLC Questions And Answers February 16th, 2021, 03:54 PM
Replies: 8
Views: 490
Posted By daba
I have everything back to Version 10 installed,...

I have everything back to Version 10 installed, all using FactoryTalk Activation associated with an activation dongle
Forum: LIVE PLC Questions And Answers February 16th, 2021, 03:46 PM
Replies: 27
Views: 3,120
Posted By daba
I have had this discussion so many times with...

I have had this discussion so many times with classes in the past.

The issue here is that neither Download or Upload convey any sense at all of the direction of the data transfer.

You can...
Forum: LIVE PLC Questions And Answers February 16th, 2021, 03:22 PM
Replies: 10
Views: 392
Posted By daba
I simply cannot remember the last time I actually...

I simply cannot remember the last time I actually printed a report, let alone generate one. (Yes I can, I think I converted an RSS to PDF for someone on here a while back).

The moment you make a...
Forum: LIVE PLC Questions And Answers February 13th, 2021, 06:14 PM
Replies: 18
Views: 1,360
Posted By daba
Hopefully you were wearing the brown trousers ?

Hopefully you were wearing the brown trousers ?
Forum: LIVE PLC Questions And Answers February 13th, 2021, 05:56 PM
Replies: 17
Views: 986
Posted By daba
Which is why I surmised the whole Routine is...

Which is why I surmised the whole Routine is edited as one "rung", or "piece of code"

Next time you edit a ST Routine online, check the memory usage like I did with ladder. I think you will find...
Forum: LIVE PLC Questions And Answers February 13th, 2021, 12:18 PM
Replies: 17
Views: 986
Posted By daba
Ok nehpets, I will try to make sense of what you...

Ok nehpets, I will try to make sense of what you have stated above.

But first, we need to clear up any confusion you, or others might have with your use of the word "task".

A Logix5000...
Forum: LIVE PLC Questions And Answers February 12th, 2021, 08:10 PM
Replies: 17
Views: 986
Posted By daba
No problem, and if you have any questions, feel...

No problem, and if you have any questions, feel free to ask.


I suppose a follow-up question to my post would be ...

Is it possible to see a rung marked "E" ?

Answers on a banknote please...
Forum: LIVE PLC Questions And Answers February 12th, 2021, 07:48 PM
Replies: 18
Views: 1,360
Posted By daba
Back in the zillions of years ago day, I worked...

Back in the zillions of years ago day, I worked for a company that serviced/tested/repaired/recalibrated thermocouple temperature measurement equipment.

One of our clients was R**** R****, and on...
Forum: LIVE PLC Questions And Answers February 12th, 2021, 07:20 PM
Replies: 17
Views: 986
Posted By daba
You have been lead to believe wrongly. ...

You have been lead to believe wrongly.



It does not create a copy of the Task, and let's be honest, the Task could be the whole application !


The only additional code memory needed is for...
Showing results 1 to 25 of 500

 
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