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In this video, we will show you how to wire and program and an ATV 312 drive
to drive to run in 2-wire control.
Now, in 2-wire control, we actually mean--
what that means basically is that you're basically
allowing the closure of a contact between the 24 supply
and the logic input one terminal.
So it can have a normally open contact between it,
and when the contact is closed, it will run the drive.
And when it's open, it will stop the drive.
That's what 2-wire means.
Now, I will say that the drive, the 312 drive
is already programmed as 2-wire control from the It is in most cases anyway.
But if some reason it's been changed, or if you want to confirm that,
you can always go in and first of all confirm
that it's programmed for 2-wire.
So we can enter from your main display.
Scroll down to IO-- inputs and outputs menu.
The first parameter is Tom, Charlie, Charlie.
And when you enter on that, you want that to be on 2C for 2-wire.
You have the option of making it 3C as well, but make sure it's on 2C.
In the event that you have to change this,
make sure you press and hold the enter key
for a number of seconds, about three or so seconds,
if you have to make a change.
But we didn't have to.
So we can discuss escape, because it's already on 2-wire.
And the next parameter is, once we're back to TCC,
you can go down to TCT, next one down.
And this is basically a type of level control or type
of 2-wire control and general.
So from the factory, set up as a transition, which
means that you actually have to power to drive up first, and then toggle
you run command.
Otherwise, if it gets a run command upon power up,
it will go to an NST state, which means that it didn't like the fact that it
came with a run command.
So you have to turn off your run command if that's the case.
But you can make it level control.
So right now, it's in transition.
You can make it level, counterclockwise, enter on level.
So what level means, basically, is that when the drive is powered up with a run
command, it will just go to run.
You don't have to wait until the drive is powered up
to toggle your run command, which might be important for some kind of safety
issues, depending on how your setup is.
But this is important for-- level control
is important for when you're doing automatic restart and the like.
So now that we've done that, it's already set up for 2-wire.
And I already have a speed reference of some kind coming into this drive.
So we can escape back out.
And like I said, LI1 is your run forward command
on this drive for 2-wire control.
So we can toggle it.
And as you can tell, it's just ramping up your drive.
And now we can remove the 24 DC off of LI1.
And it'll go back to ready.
Now, I want to go in and show you how the driver is
going to react in a transition mode.
So we can go ahead and go back into the IO menu, TCT parameter.
Let's make it back to transition.
So with it powered up, it runs fine, it stops fine.
But lets go ahead and enable the run command, kill power to the drive,
let it go blank, and then power it back up.
And you get an NST.
As you can tell, with the run command enabled upon power
up with a transition state, it did not like that.
It expected you to drive to get a power first,
and then you toggle your run command.
So you can choose to disable your run command and reapply it again.
And as you can tell, it's happy now and knows that it's OK to run.
So this is basically how you set up a 312 drive to run 2-wire control,
as well as the types of 2-wire type you can assign in this particular 312
drive.