Setting up SMV Drive Parameters

1. Enter the “edit parameter mode” by:

a. With the drive powered up the display should read “Stop”.

b.  Press the M key once.  The drive will flash “PASS” then display “0000”

c.  Using the arrow keys change the display to read the default password “0225”

d.  Press the M key once.  You can now use the arrow keys to navigate to the parameter you want to change.

Changing the SMV to high frequency mode above 120hz:

1. Enter the “edit parameter mode”

2. Navigate to parameter P103 (Maximum Frequency Output)

3. Press the M key once.

4.  Use the arrow keys to change the maximum frequency to the desired value.  The range of adjustment is 7.5 hz to 500 hz.  When changing this parameter to a value higher than 120 hz you must stop first at 120 hz.  The drive will flash “Hi Fr”.  Release the button for one second.  Press the key again to proceed to the desired value higher than 120 hz.

5.  Press the M key once.  The maximum frequency is now set to the desired value.

As always, customers are encouraged to read the owner’s manual or visit our websitehttp://www.precision-elec.com/ for technical documenatation and support. If you are unable to locate the information needed, please call us direct!

Dynamic braking is used when an overhauling load causes regeneration from the motor to occur, especially in situations where the required deceleration time to stop the motor cannot be achieved due to High Voltage nuisance tripping. Most Lenze-AC Tech DB circuits are rated for light-duty use only. The dynamic braking (DB) control circuit is connected to and monitors the fixed DC bus line. When the DC bus reaches 114% of the maximum tolerance, it triggers the chopper circuit in the dynamic brake. The DB circuit will be active whenever the voltage rises on the DC bus. This can occur while the drive is running, while it accelerates or decelerates or even when it is stopped. Using dynamic braking allows a faster deceleration time of a high inertia load. However, fast deceleration of a high inertia load may sometimes cause regeneration and trip the drive into a High Voltage fault. To avoid this, a dynamic brake chopping circuit is switched on when the voltage levels exceed the rated tolerance and brake resistors dissipate the regenerated voltage as excess energy.

Thermal Protection from Overload for the DB Module

Lenze-AC Tech brake modules rated at 0.33 to 10 HP have resistors that are internally mounted. In these modules there is a thermistor that monitors the resistor’s temperature and can be connected back to the drive to trigger a drive fault.

Using a Lenze-AC Tech DB with Another Manufacturer’s Drive

Applications Support is often asked if the Lenze-AC Tech DB module can be used with a non-Lenze AC Tech drive. This is not possible. The Lenze-AC Tech sub-micro drives have specific inputs that are set to trigger the Lenze-AC Tech DB modules. Other VFD manufacturers may encounter problems trying to trigger the DB chopper properly. 1 For the SMVector drives, the dynamic braking module includes a small connector that plugs onto the drive’s DC Bus Board for the B+ and B- connections. A set of mounting instructions is included.

Specifications for these Dynamic Brake Kits and diagrams are available on AC Tech Lenze manual#AN 0039A which can be viewed via PDF at our website at:

http://actech.com/documents/techlib/AN0039A.pdf

As a result of over-harvesting, environmental pollution and two new parasites, the famous native Chesapeake Bay oyster population has dramatically decreased. In an attempt to bolster the population, the University of Maryland is conducting a study to assess the effects of introducing the Suminoe oyster, an Asian species that has shown to be resistant to the prevalent parasites.

A University of Maryland 24-month study will examine the Suminoe oysters’ eating and reefing habits as well as their vulnerability to the known native oyster predators. The tests will be conducted at the University’s Center for Environmental Science Aquaculture and Restoration Ecology Lab. This new facility has the unique advantage of both closed aquatic system as well as a secure, flow-through system plus experimental temperature and carbon dioxide controls for climate change research and a quarantine laboratory for the safe study of non-indigenous species.

Through their mechanical contractor, J.M. Zimmer, Inc., the University of Maryland chose the Lenze – AC Tech MCH variable frequency drive to control their pumps, cooling towers and building HVAC system. The MCH drive features a built-in PID set-point controller function as well as the automatic 3-contactor drive bypass, which assures full isolation of the VFD electronics and allows the motor to transfer from ‘drive’ operation and continue running across the line in ‘bypass mode’.

“The advantage of the MCH 3-contactor bypass in strictly controlled testing laboratories,” explains Joe Zimmer Jr. of J.M. Zimmer, “is an increase in reliability, making sure we maintain uninterrupted performance of the laboratory’s entire HVAC system, so research results are not compromised.” Having the power and control wiring easily accessible and ample wiring space, the MCH is considered one of the simplest to install, set up and use of all the HVAC variable frequency drives on the market. A single-point connection makes the MCH drives less error-prone and easy to support.

Process systems often require a system-controlled parameter, such as motor speed, to be able to react to variable situations in order to keep other system attributes constant, such as pressure, flow or temperature. Lenze – AC Tech builds the set point controller function into the MCH drive to compare the set-point value to the actual value and generate a speed command to the drive to correct the variance or error.

MCH Series Benefits

• Automatic Transfer to Bypass Option

• PID Setpoint Control

• Program Controller: Direct or Reverse-Acting

• Keypad Option for Local & Remote Operation

• Simple to Install

• Proven Performance & Reliability

Flomotion Systems develops and manufactures unique sealless peristaltic pumps that eliminate loss-of prime failures in chemical feed applications. Typical markets served include water & wastewater treatment, chemical, food & dairy, pharmaceutical, pulp & paper, energy management, power and irrigation.

A long-time user of Lenze – AC Tech’s MC Series drives; Flomotion has now incorporated the economical, compact and lightweight SMVector drive in the design of their 2001HEC Series pumps.

The Flomotion 2001HEC Series are rugged, reliable and cost effective industrial hose pumps built to succeed in harsh industrial environments. Several features of the SMVector make it a perfect fit for the job, including a removable terminal cover; easy access for control and power wiring and the fact that it can handle a wide range of operating temperatures from -10 to 55ºC. Last but not least, according to Flomotion, the SMVector offers better protection against electrical shock than any other NEMA 1 controller on the market.

Mounting the SMVector controller directly to the pump allows Flomotion to optimize precious panel space and offer its customers outstanding convenience. The unique EPM or Electronic Programmable Module stores the drive’s parameter configuration greatly simplifying initial setup.

Centrifugal and pumping applications especially those moving fluids or a mixture of wet and dry ingredients present a challenge because the speed is affected by the load. Fluid moving applications require ‘variable speed’ – a drive and motor that can produce the necessary horsepower to move the load at a constant speed. The motor will draw from the drive the amount.

of current it needs to ‘do the job’. The SMVector drive works well in this type of application because the speed can be controlled tightly in vector mode (more torque/less speed) or loosely in V/Hz mode to determine just the right amount of speed.

SMVector Benefits

• Multiple enclosure options available

including washdown

• Wide temperature range: -10 to 55ºC

• Removable memory (EPM)

• Multiple operational modes

(V/Hz, Enhanced V/Hz, Open Loop Vector)

• Lightweight, compact design

• Intuitive programming

• Multiple communication options

• Economical

Lawrence Equipment headquartered outside of Los Angeles CA, designs and manufactures state-of-the art flat bread and fried snack equipment used in single small scale and multi-national large scale operations throughout the United States and Europe. The company’s tagline – “The edge on automation” summarizes their commitment to advanced technology and superb customer service.

As part of their continuous improvement program, Lawrence Equipment searched for the most efficient automation solution for their Mega Series Press. With a capacity of up to 3,000 dozen, 6” diameter tortillas, chapati, roti or wraps per hour, the Mega Series press is designed for large wholesale and supermarket production. In the demanding and competitive market of food processing equipment, machine yield, quality and uptime are non-negotiable. Customers from across the globe rely on the performance of Lawrence Equipment’s high-end presses. When designing the Mega Series, the Lawrence engineering team focused on specifying components that provide value, improve ease-of-use and ensure dependability. They especially appreciated the PositionServo’s outstanding programmability and flexibility as well as the expert support provided globally by Lenze – AC Tech.

With the PositionServo, servo-actuated indexing is now a standard feature of the Mega Series press; It accurately arranges the array of dough balls on a Teflon mesh conveyor belt with the exact speed, acceleration and distance so they are fed continuously and evenly into the oven. The servo drive monitors feedback signals from the motor and continually adjusts for deviation from expected behavior. Also, PositionServo drive parameters are stored in the drive’s EPM (Electronic Programmable Module), allowing Lawrence Equipment engineers to create programs once and then simply copy them in seconds, saving time and avoiding errors. According to Lawrence Equipment, since the inclusion of the PositionServo in the Mega Series Press it has contributed to a significant increase in throughput. Lawrence Equipment is currently considering  incorporating the 940 PositionServo across all its machine platforms.

PositionServo Benefits

• Superior Performance

• Quick, Intuitive Programming

• Removable Memory (EPM)

• Seamless Integration Into System

• Global Support

• Multiple Communication Options

• Outstanding Value

• Product Availability

Lenze – AC Tech has worked closely with a specialist ultrasonic engineering company to solve the problem of making the perfect sliced sausage quickly and with minimal waste. A traditional cured continental sausage is difficult to cut very finely in an automated process because of the adhesive qualities of the meat, when a slice is made with a normal blade it tends to stick to the blade surface after the cut is complete.

The ultrasonic company, more used to sieving and sorting fine powders than chopping sausages has applied it’s high frequency vibration technology to ensure the slices drop away from the blade neatly into the correct place each time. The challenge was to integrate this high-end technology into a slicing machine and still meet the low-cost demands of the food processing industry.

The solution was simple, using a 4 amp PositionServo 940 with encoder feedback to control the position of the blade; the knife could be reciprocated in minimal time and with maximum speed and accuracy. Driving through a precise Lenze MCS servo motor and gearbox combination and a cogged belt drive, the thickness of the slices can be controlled along the entire length of the sausage.

The PositionServo is controlled via a Lenze drive PLC unit and an HMI, in this case a 4” Lenze LCD grey scale touchscreen display. By using an smd drive to power the conventional AC motor that actuates the blade, the machine can be operated with domestic 110 – 240 V supply and still supply a super cost effective combination. Using CANopen to link all the machine control components also allowed minimal wiring to be used and resulted in a highly compact machine that is easy to program and very easy to use.

Features:

Integrated servo, inverter, gearbox

and HMI solution

Complete component compatibility

High speed accurate position control

Precise automation within a low budget

CANopen compatibility

Easy to use

KVAL, a highly specialized manufacturer of door cutting machinery was searching for a better servo drive to improve the cost and performance of its milling machines. A local automation distributor introduced them to the Lenze-AC Tech PositionServo. The challenge was to find a cost competitive drive that would fit the existing profile and yet work with legacy servomotors and resolver feedback.

The solution was found in the PositionServo 941 designed specifically for resolver feedback. The PositionServo 941 was fitted directly to an existing machine and tested immediately in ‘torque mode’. The drive performed beautifully from the first application of power and led to substantial orders soon after. KVAL is recognized as a leader in the design and manufacturing of precision-engineered door machining and millwork equipment. Increased competitiveness within the millwork industry has forced many smaller companies to become more specialized. As a result, KVAL had to alter the design and configuration of many of its machines, the ease-of-use and programming of the PositionServo 941 meant that it was a simple solution to varying machine requirements.

Compatibility with the existing machine set-up was very important and since Lenze-AC Tech PositionServo products are designed to work effectively with the widest range of motors, feedback and machine control systems, it was no problem to fit in with components from three other manufacturers. Cost is an inevitable pressure for any machine manufacturer and KVAL is no different, the fact that the PositionServo provides solid precision performance, but without a price premium sealed the deal.

PositionServo Benefits:

• Works with existing servo motors

• Easy programming

• Resolver or encoder feedback

• Solid technical support

• Rugged performance in harsh environments

• Tight positioning control with

scalable emulated encoder output

SMV Standard Enclosure

• NEMA 1 (IP31)
• 120V – 600V
• 0.33 to 30HP ( 0.25 – 22kW)
• Open-loop Vector, V/Hz

Washdown Enclosure

• NEMA 4X (IP65)
• 120V – 600V
• 0.33 to 30HP ( 0.25 – 22kW)
• Open-loop Vector, V/Hz

Integral Disconnect

• NEMA 4X (IP65)
• Integral Motor & Drive Disconnect
• 0.33 to 10HP ( 0.25 – 7.5kW)
• Open-loop Vector, V/Hz

MC Series

• 120-590V
• 00.25 to 150 Hp (0.18-110kW)
• NEMA 1 (IP31), NEMA 4(X) (IP65), NEMA 12 (IP54)
• V/Hz

MCH Series

• 200-590V
• 1.0 to 250 Hp (0.75-185kW)
• NEMA 1 (IP31), NEMA 4(X) (IP65), NEMA 12 (IP54)
• V/Hz

Lenze – AC Tech offers many other products including but not limited to servo drives, gearmotor drives, and more. To learn more about additional Lenze – AC Tech products please contact us.

In this particular case, however, all of the documentation was written in the Swedish language. The drive itself had extensive documentation in the form of manuals that were written in English, but there were no actual machine documents written in English.

The customer had taken the liberty to do a good chunk of translation regarding the essential documents, but as you know, even documentation written in the English language can be hard to understand if you weren’t one of the original engineers.

On projects such as these, I typically like to spend a day or two with my head completely in the program – in this case with the Google Translator at my side. The two most fundamental aspects I was looking for? The homing sequence and the foam gun sequence (as they desired changes to the way the gun operates).

This is the order of operations I took, and it may help some of you out in the future:

1. Gather all of the documentation specific to the job.
2. Gather the requirements of what the customer desires and write them down.
3. Gather all of the tools that will help you break the language barrier (human translators or robot ones)
4. Dig out the I/O list if it is included in the documentation (if it is not, build the list yourself manually)
5. Translate that list to the proper language
6. Cross reference your I/O list to your documentation to seek out a homing sequence in the program
7. Use this as your starting point, as your homing sequence is typically the building block of your program.
8. Next, target the section of the program (referencing the I/O related to it) the customer wants changes too or is having issue with.

This is an excellent starting point for any troubleshooting of PLCs or Motion Controllers outside of your language barrier.  After two days of research and properly building my own documentation – I was able to get the machine running (not without headaches of course) in about one 8 hour day.

Even though the documentation was in a completely different language, this job would have taken weeks had there been no documentation at all – this truly is a testament to the importance of having documentations for your systems – even if that documentation is in a completely different language.

Craig Chamberlin