Let’s get the shaft on this 1 horse power motor spinning using this 1 horse power Nema-4X
Iron Horse ACN drive. I love that this family of drives has the option of a pre-installed
built-in disconnect that’s ready to go out of the box. I’ll flip that on to apply power
to the drive. Let’s reset the drive to factory default
so you know exactly where I am starting from. Just right arrow over to the drive parameter
group. I’ll down arrow to parameter 93 and select that by pressing the enter key.
Change its value to a 1 and enter that. It blinks to ask you to verify that’s what
you wanted and to give you one last chance to change your mind. If it isn’t what you
wanted, hit escape to get out. It only blinks for a few seconds, so if it stops, hit enter
to get it blinking again. This is what we want, so I’ll hit Enter while it’s blinking
to accept it. Hit escape to get back to the main frequency display.
Since I’m using a 1 horsepower drive with a 1 horsepower motor on a 60 hz 3 phase supply,
most of the parameter defaults are already setup for us.
By the way, all of the Ironhorse ACN drives can be run single phase, just make sure you
connect to the R and T – or L1 and L3 - terminals if you use single phase AND you use an AC
line reactor. That helps smooth out the DC bus ripple created by the single-phase supply.
Let’s modify a few parameters to see how that works. How about a 2 second acceleration,
a 4 second deceleration, and we’ll make the run stop command use the keypad run stop
buttons and have the up down arrow keys on the key pad control the frequency. And let’s
see how to reverse the motors direction. The cool thing about the ACN drive is while
you can rotate through the parameter groups using the left and right arrow keys, the drive
brings the most common parameters up to a top level operational menu that you access
using the up down arrows keys. I love this chart in chapter 2 of the user
manual. It shows you how you can scroll up and down through most often used parameters
or you can scroll left right to access all the parameter groups and then use the up down
arrow keys to access each groups members. For this video all we need is the acceleration,
deceleration, drive command source, frequency source and forward reverse direction control
so we only need this top-level Operations Group of parameters which we access using
just the up down arrow keys. This chart showing that operations group of
parameters – which I stole from the product insert that comes with the drive - will help
us keep track of where we are. The drive is currently showing us the frequency
display, so we are here on the chart. I’ll up arrow once and we get the acceleration
parameter. Press enter to drop down into that and we see it’s a 20 second acceleration
time. I’ll scroll over to the ones digit and change that to a 2 and scroll to the tens
digit and change that to a zero. Press enter to select that, and press enter again while
it’s blinking to accept it. And just like before, if it stops blinking, you’ll have
to press enter twice. I’ll up arrow again to the deceleration
parameter. Enter into that. You can scroll up or down to change vales, but it’s so
much quicker to just scroll left or right and change each individual digit. Enter to
select that and enter again to accept it. I’ll up arrow again to the drive command
source selection. It defaults to a 1 which says use the input terminals for drive run
stop control. We want to use the keypad which is a zero. Enter to select that and enter
again to accept it. If I up arrow one more time we see the frequency
source parameter. Enter into that. There are two ways to control the frequency from the
keypad. The manual refers to them as keypad 1 and keypad 2. Keypad 1 says don’t change
the frequency until you hit enter select it and enter again to accept it. Keypad 2 – which
is a 1 - says change the frequency as you scroll. Let’s select that one and hit enter
to accept it. I’ll hit escape to get back to the main
frequency display. When I hit RUN we see the run and forward
LEDs light up. Hit Enter to change the frequency. As I scroll through the frequencies the motor
responds immediately. Exactly what we asked for.
Let’s switch that to requiring an enter keypress to change the frequency.
Escape out of here and up arrow to the frequency source select. Enter into that. If I try to
change this nothing happens. Why? Well, you can’t change the frequency source while
the drive is running. So I’ll hit stop, wait for the motor to spin down, and now I
can change it to a zero for the keypad 1 operation. Escape to the frequency display and Hit RUN.
Enter to change the drive frequency. Now when I change the drive frequency, nothing happens
until I enter to select it and hit enter again to accept it. Perfect.
To reverse the direction of the motor I’ll just down arrow once to the direction control
and change it to R for reverse. Enter to select and enter again to accept. The motor immediately
ramps down and ramps back up in the other direction.
While the built in disconnect is handy, you should never use that to stop a motor. Always
hit stop, wait for the motor to spin down, then remove power from the drive.
While that should be enough to get you up and running quickly, know that this is a VERY
capable drive so be sure to check out the other videos in this series to get the most
out of your Ironhorse ACN drive. Especially the one on how to use the FREE drive configuration
software. It makes commissioning your ACN drives a snap.
And the product insert has a lot of really useful stuff like where to find the basic
motor parameters, a horsepower to kilowatt converter, a quick wiring diagram, How to
use external switches for command control and a potentiometer for frequency control,
a list of fault codes, commonly used commands, I/O pin assignment codes, Dimensions, Mounting,
Power wire sizes and screw torques, and a list of all the parameter groups. So, keep
that guy handy. And if you do misplace it, you can always download a copy of it or any
Ironhorse documentation including 3D models at automationdirect.com for free.
Click here to learn more about the Ironhorse ACN drives. Click here to learn about AutomationDirect’s
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