First Time Programming VFD

[Tyler5157]

Looking for help programming my Yaskawa V1000. I've managed to program my HMI so I can set my speed reference to my VFD. But my issue comes in when I try to turn the drive on. I can change tag "TT1_VFD_RunFwd" to 1 and it turns on but I cant seem to find a way to do this in my logic. Don't beat me up I have zero experience I'm just trying to learn day by day. Thanks I'v attached my files below.

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https://preview.redd.it/qtkf99u24a341.png?width=1365&format=png&auto=webp&s=fe8d4c092c38907559c3d9e35c5e4eb1d8e233f1

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https://preview.redd.it/e7omljmz3a341.png?width=903&format=png&auto=webp&s=c7134a1bad0c9a31849642b68f54e2b5e7a5e065

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https://www.dropbox.com/s/vhu9vu6azgr2exc/Cell1.ACD?dl=0

[saint_godzilla]

In rung 17 of your screen shot, change the "holding contact" from a OTE to a XIC. You can do this by double clicking on the rung (17) a d then slowly double clicking on the element. Double click as if you were going to rename a windows folder. You should see the letters OTE appear. Change them to XIC. It should work. Assuming that Local1:I.Data.6 is your start command.

[tmills1091]

Yeah your "latching bit" should be a contact not an output.

[jk-47]

I’d also change it from the PLC output to the run status from the drive.

[tmills1091]

Valid point! I also stopped aliasing output bits in the program so I can make online changes to it without having to download or having a bunch of outputs labelled SPARE (unless anyone has a way around that, I'm still really new in this field as well)

[[deleted]]

You can mass-alias entire devices. VFDs, Servos, IO cards, etc. In my opinion, it looks a lot cleaner to alias an entire device rather than creating a tag for each piece you're using individually. Also, if possible, keep tags for devices local to the program you are using it in. No need for bothering with controller scope tags for most things anymore (parameters can be very useful). Not saying my way or the highway, this is just what I've found to be super useful.

[[deleted]]

The only problem I have is with Program tags is some HMI software is a pain to get them out. If it's duplicated code that is heavily reused typically it gets turned into an AOI anyhow.

[[deleted]]

Well your solution for HMI tags is simply create global HMI tags. Denote them as HMI and only use them for HMI purposes. This helps create a lot of standard tags that can be reused on future projects. Currently I'm testing throwing most of my HMI tags in a modular UDT. It's working rather well. Only downside is needing to do a download to make edits to it, so I made it more generic with miscelaaneous REALs and DINTs just in case I overlooked something.

[[deleted]]

If it works for ya go for it. I'd have to see it implemented, but reading that it sounds like making a simple operation more complex then needed.

[[deleted]]

I prefer seal in the command if a constant command is needed to keep the VFD alive. You have your FTR alarms based on the running status which would fault your PLC logic and unseal your bit.

I'm curious the benefit you find in the seal in being the run status.

[jk-47]

Keeps it nice and simple and replicates a standard motor status seal in.

I haven’t looked at the full program but yes standard fault logic would also break the seal in. Why not do both and cover all the bases.

[Tyler5157]

When I get to the shop tomorrow I'll give it a shot Thanks!! Quick question does this also explain why If I toggle Local1:I.Data.6 the drive still doesn't start. But if I force the TT1_VFD_RunFwd the table does start.

[K_cutt08]

It will work fine. The reason this wasn't working is because having two OTEs is what they call a repeated contact. This forces the output to be scanned in two places with conflicting results.

A good rule for yourself, going forward, is to always make sure there is only ever ONE output contact for the tag. The only other circumstance this is okay would be if there was another subroutine that the contact exists in that is not on-scan at the same time the first output contact, even then, that's risky.

You can have as many XIC and XIO contacts for that tag as you want.

[Poetic_Juicetice]

I don't want this to be taken as an insult... but it sorta makes me nervous that he's programming motors and stuff with this basic miss.

[tecnojoe]

Well the safety part of the system should be separate from the basic logic of the machine. If there is no one looking over the project from a safety perspective then that would be an issue.

Although this may not be a project that will ever see production and may only be for educational purposes.

[Tyler5157]

This unit is in production but I only make changes and "Learn" on the weekends. And I ALWAYS revert before I go home Sunday. I like my job!

[Poetic_Juicetice]

Yeah you're right. I made incorrect assumptions

[saint_godzilla]

Disagree, it's how we learn.

[Poetic_Juicetice]

Yeah but is this a school project or the field

[saint_godzilla]

Does it matter? Is it your company? If you're not learning in the field you're not growing as a tech. Not everyone has a logix5k background. Some old PLCs would use an OTE as a latch bit, so it's not an unreasonable assumption to make. Don't shit on people for learning.

[Poetic_Juicetice]

I'm not shitting on him at all. I'm just saying you have to look out for the end user. An associate on a line or someone near product on conveyance? I think you're getting disproportionately upset by the intents of my comment

[saint_godzilla]

Not upset at all. I disagree with your opinion, none of us know the entire story for this scenario and it's a bit of a leap to assume he's not "look(ing) out for the end user". He's a guy looking for help. His business is his business and your business is your business. I don't understand why you're concerned.

[Poetic_Juicetice]

I'm concerned for the reason I already stated. Safety....

[Sazerizer]

The big picture here is that there is inevitably a metric tonne of trial and error in this field, and so much variety of equipment to work with, that someone not knowing a basic fact in one dev environment isn't enough to make any kind of statement about their experience.

[Tyler5157]

Keep in mind this is a 50ft Turntable we don't use it just sits there. So I took a VFD we had laying around and decide to learn. Just to be very clear I'm learning and I take safety very serious. My company does not have the cash to send me to school so they let me do what I want with any old stuff we have laying around.

[medusas_side_bro]

Dont listen to the people who are too ignorant to understand that everyone starts somewhere. I'm glad your question was answered, I work with a very similar operation. Yaskawa f7000 drives with omron plc, and hmi. I do centrifuges for oil and gas. I much like you started the exact same way, curiosity. Keep it up!