If you have an SM series drive by AC TECH and have not had a plant power failure, it could be just a matter of time due to high electrical grid burdons or fortunate that severe storms have not struck your area.  But recently we had an existing customer experience this particular issue and they were now in a down situation and needed to get back up and running fast.  Unforturnately, a step by step procedure is not published, but the informantion is in the manual, just not in the best organized fashion.  Here is a quick reference guide for when this occures.

Per the Technicians at AC TECH:

“A manual reset is down by setting parameter P48(program) to a value “04” (reset 60hz).

To access the parameters hit mode, if prompted for a password the default password is “225”, then hit mode again and it will display P01 scroll up to P48, hit mode, scroll to a value of “04” and hit mode again to accept the new setting, the drive will then be successfully reset.

Keep in mind that any parameters that have been changed from their default settings will be reset and will need to be re-programmed so it may be helpful to record parameter settings prior to preforming a drive reset. Also, if it is an OEM unit set P48 to “03” (reset to OEM settings)".

We at Marshall Wolf Automation are happy to provide this valuable information and would like to thank the factory technicians at AC TECH LENZE for their partnership and well organized operation and are proud to provide their products to the market.  Marshall Wolf Automation is a leader in the supply of AC FREQUENCY DRIVES and if you have an application, please visit us on the web at www.wolfautomation.com or contact us at sales@wolfautomation.com or if desiring to speak to any of our sales department for pricing and availability, please don't hesitate to contact us at 847-658-8130.

I started my search by checking out Wikipedia. I then looked up and read a number of things to come up with my very own simplified explanation. Disclaimer: I am in no way an engineer! This topic gets pretty deep, pretty fast. I'll do my best to keep it basic.

Vector control drives basically control 3-phase AC electric motor output by using two variables; voltage magnitude and frequency. We'll go just a little bit deeper to explain that vector control is available as field oriented control (FOC) or sensorless.

Most variable frequency drives used are Volts/Hertz, which means they provide open-loop operation. These drives are unable to retrieve feedback from the process, but can generally do the job for most applications. If these drives are not accurate enough then you want to take a look at vector control.

In general, if your application requires higher levels of accuracy, vector may be the way to go. These high performance AC drives can adjust themselves to sustain the programmed speed, rate, torque, and/or position.

Marshall Wolf Automation is a variably frequency drive powerhouse! We have a large inventory ready to ship, competitive pricing and we are authorized for all the top brands. Did I mention complimentary tech support?

View all of our AC drives now!

Marshall Wolf Automation has reached $1 million dollar in sales for Lenze AC Tech's fiscal year.

Lenze AC Tech is a key product line for Marshall Wolf Automation and we are very excited to announce this milestone

Marshall Wolf Automation is your authorized stocking distributor for AC Tech variable frequency drives. Our inside sales and technical support staff can quickly assist you in finding the best high performance AC drive for your application.

Thank you to all of our customers that helped us reach this goal!

This topic is new to me as I have not had much experience with DC link chokes. My recent time spent categorizing inventory has changed that!

Reactors for variable frequency drives are sold as either AC reactors or DC reactors. Guess what another name for DC reactors is? You guessed it... DC link chokes.

A reactors job is to smooth the current flow to the drive and reduce harmonics. The difference between an AC line reactor and DC link choke includes the following:

• AC reactors are in series with the incoming AC power line. DC link chokes are connected after the input diodes in the power circuit. 
• You can use both of these in an application and achieve 6% impedance.
• AC reactors are about 1.5 times the price of a DC link choke

Interested in finding out which (or both) would be best for your specific application? We have in-house engineers ready and waiting!

Marshall Wolf Automation is your authorized industrial automation distributor for MTE, Hammond Power Solutions and TCI line reactors and DC link chokes.

Sometimes we receive calls with older AC Tech variable frequency drives that might be replaced, but the end user has no idea of the age of the unit. 

This could occur for a variety of reasons; they didn't purchase it, it came installed on an OEM piece of equiment or was existing in the factory.  As a distributor, we don't always have access to all of the manufacturers internal documentation, but here we can now break down the important parts of the serial number to identify the month and year of manufacture.  It's very helpful, especially when trying to figure out if a drive is still under warranty. 

So let's look at the following example:

The following is from an AC Tech unit serial plate:  R14880903   What do we need to glean from this number?  We only care to look at the last four (4) digits, in this case (0903) 

The first two digits (09) signify the year of manufacture ( 2009 ), the last two digits ( 03 ) signify the week of 2009 that it was manufactured, i.e. the 3rd week of 2009. In this case, the drive was manufactured the 3rd week (January) of 2009. 

This coding applies to all AC Tech Drives, if you have a need for a Lenze AC Tech replacement or new application, please don't hesitate to contact us.  We can help size your application after some technical query. 

Check us out on the web at www.wolfautomation.com or contact us at 847-658-8130 or email us at sales@wolfautomation.com.  Wolf Automation is your authorized AC TECH LENZE drive distributor.  We are one of the top AC TECH LENZE AC VFD distributors in North America.   Contact us today, we can help!

The AC Tech Lenze's SMV frequency drive is one of our most popular VFD's in the 60 HP and under market. 

The drive is extremely popular, due to a wide variety of input power (voltage/phase) from 120V single phase to 600V 3 phase configurations.  The drive also comes in a variety of enclosure specifications from NEMA 1 to NEMA 4x indoor and outdoor rated models and even with an integral disconnect switch if desired. 

One of the strongest features of the series is the ease of programming, extremely simple compared to most other competitors models.  The market now has even more capability with this versatile series.  What am I trying to say?  New and improved, well... not new, but with great improvements. 

Sequence Parameters:  What does this mean?

Well, the NEW parameters P700; provides function consisting of 16 step segments, each individual step can have its own RAMP TIME, TIME SPENT IN INDIVIDUAL SEGMENT, and OUTPUT FREQUENCY.  The sequencer has three different modes to control how the drive moves through each individual step segment, IE: Timer transition, Step Sequence or Timer and Step Sequence.  Sections 4.5.9 through 4.5.9.3 of the Operating Manual explains the function and programming. 

You can find the manual on our website at www.wolfautomation.com.   Next question is, what do I need this for? You can use it to do timing functions, time out blowers, pumps, cycle equipment; kind of like integrating a mini PLC or smart relay right into the drive. 

When thinking about your next drive, think about AC TECH LENZE'S SMV series of VFD's, if this drive fits your horsepower requirements, consider this drive it's a winning combination that is hard to beat.  Wolf Automation is your Industrial Automation Distributor for VFD's -  7 different brands to meet your VFD needs.  Contact us today, we can help, call us at 847-658-8130 or email us at sales@wolfautomation.com

Marshall Wolf Automation, your industrial automation distributor for all things that keep your business running has all of the AC Tech/Lenze products you need. 

The general purpose variable frequency drives in the SCM/SM series (IP 20 and up to 15hp) are ready to use right out of the box - simple to program and easy to install. Available in single or 3 phase input

If you need a general purpose drive with modbus, the SCF/SF series is perfect! The same as our SCM Series - with these added features:Analog outputs of speed and load and modbus communication and optional high output frequency!

How about a NEMA 4X indoor duty vector drive?  The SM Vector drives can handle that.  And for an outside version of that same drive, click here. NEMA 4X rated for indoor or outdoor use and available in standard or filtered input. Now up to 30hp!

We've got you covered in an HVAC-oriented drive as well.  The variable torque MCH series is available in up to 250hp!  We can provide the drive with standard options such as input disconnect and fusing, line reactor, 3-contactor bypass and more enclosed and mounted to the drive in a ready to install package. 

Call us today at 800-325-9653 (WOLF)