Debounce and zero time

[Bolt]

I like the new debounce instruction. It just has one thing that annoys me. I can't enter a zero value in either of the two time fields. I also can't enter a symbolic constant that is set to zero. But I can enter V0, and set its value to zero. Seems like a little bit of a glitch to me.

[Controls Guy]

Write your own and do a CALL.  Debounce (and SCale with Parameters) is typically some of the first boxes I write on platforms that let you roll your own.  S7 for some reason, is missing statistical functions.  Mean, median, standard deviation and so on.  There's probably an add on library somewhere that has it, but on a platform that lets you write your own, doing so is probably quicker and easier than finding it, plus it's done exactly the way you want it.

[BobO]

I like the new debounce instruction. It just has one thing that annoys me. I can't enter a zero value in either of the two time fields. I also can't enter a symbolic constant that is set to zero. But I can enter V0, and set its value to zero. Seems like a little bit of a glitch to me.

Due to the way the hysteresis was designed, I think we decided it needed at least a 1 in each direction, but looking at the code again, I think it works fine. We'll look at relaxing the range definitions for the editor.

[Bolt]

Cool.  Not a huge deal, but it helps in making some single sided latches, off delays, etc.

[BobO]

Five minute change. Should be in DmD 2.2.

[plcnut]

Bobo,
Did the zero time issue in OFFDTMR ever get resolved? If the time was zero, then the output would never turn on at all (Even though the input was high).

[BobO]

Bobo,
Did the zero time issue in OFFDTMR ever get resolved? If the time was zero, then the output would never turn on at all (Even though the input was high).

That would require changing a behavior that would potentially affect running programs. We are very reluctant to do that, even if something is technically broken.

[Bolt]

Thanks.  I like the quick turn around and response from you guys.  The president of the company engaging directly with the end users resolves/satisfies allot of things quickly.

Keep up the good work.

[plcnut]

Bobo,
Did the zero time issue in OFFDTMR ever get resolved? If the time was zero, then the output would never turn on at all (Even though the input was high).

That would require changing a behavior that would potentially affect running programs. We are very reluctant to do that, even if something is technically broken.

I understand what you are saying...
I have a bunch of these instructions in the field that I hope nobody ever enters a zero in via the HMI... I did not think to test at zero before I launched the projects.

[Controls Guy]

The president of the company engaging directly with the end users resolves/satisfies allot of things quickly.

That is pretty cool.  To be fair, AB does have an IICIP  (Intern In Charge of Ignoring the Proles)

[BobO]

The president of the company engaging directly with the end users resolves/satisfies allot of things quickly.

That is pretty cool.  To be fair, AB does have an IICIP  (Intern In Charge of Ignoring the Proles)

I LOLed more than appropriate.

[BobO]

Thanks.  I like the quick turn around and response from you guys.  The president of the company engaging directly with the end users resolves/satisfies allot of things quickly.

Keep up the good work.

The cow and the chicken are interested in your breakfast, but the pig is truly committed to it. We like to think of ourselves as being "pig committed".

[Garyhlucas]

Got the full gouge-O-matic treatment from AB today. Four year old motor control center with empty door spaces and we want to add 1/2 hp vfd and a 1 hp vfd. AB says this is a ETO Engineer To Order task. $6850 EACH!  The whole 3 section MCC originally cost us about $15,000.  The AB factory guy says they have 80% of our market in PLCs. I replied “yes I know, those poor bastards. We are trying to correct that!”

[PLCGuy]

lol

[Controls Guy]

For $6,850, they shouldn't send you a bucket, or a motor!  They should send an AB employee to crank on the machine personally.

Can you buy an empty bucket and put in your own VFD?  I don't think you can UL it if you do that, but the project may not need that.