Jump to content

Unitronics' Blog: PLCs, HMIs and more

  • entries
    76
  • comments
    41
  • views
    76,950

Contributors to this blog

**New*** Application Stories!


Cara Bereck Levy

1,505 views

We've had some new Application Stories submitted recently. I'm posting two stories and a video here--visit our site to see them all!

If you are interested in submitting your story, contact us at Usa.sales@unitronics.com for details.

Story 1 - Waterplay® Aquatic Play Pad Uses V130-33-R34 to Bring New Life to Communities

Waterplay® Solutions Corp. provides premium aquatic recreational features world-wide. They needed a PLC with a built in HMI that could meet their specific programming and space requirements.

Unitronics' V130-33-R34 was the perfect solution to their specific needs.

Waterplay

----------------------------------------------------------------------------------------------

With thousands of installations world-wide, Waterplay® Solutions Corp. has provided their customers premium aquatic recreational features since 1987. Offering a variety of innovative products that are designed to turn any space into an exciting attraction, Waterplay® responds directly to their customer needs; including aquatic play features, slide activity centers, waterslides urban water features, and water management solutions.

With one particular project Waterplay® was working on in Texas, they had an aquatic play pad that had a very small area where a PLC controller could be placed. In their existing line of controllers they were using at the time, they specifically needed a digital output to control a relay, and the particular manufacture they were using did not have a PLC with high enough rated built in relays to operate the valves that they used. As a result, they were on the search for a PLC with an integrated HMI. The controller need the following operations either built in or programmable to meet their requirements:

Programming requirements:

· Start/stop time for the week

· To be able to have the system on/off for each day of the week

· Receive an input from the field to start a sequence

· Log number of activations/per day and downloadable

· Automatically open/close each output

· To have internal relays that can operate a solenoid valve that requires 0.41 amps of in rush current (0.25 amps holding)

· Relatively easy to program with minimal cost for software

· Field reprogrammable with a flash card

Physical requirements:

· To be able to fit in a 6 x 10 inch space

· Multi line graphic interface

· Expandable without taking up additional space, or using minimal additional space.

"The Unitronics V130-33-R34 was able to reach these requirements and more." Said Carney Neave of Waterplay® Solutions Corp. "The controller was very easy to program and customize for our application. The staff and tech support of Unitronics are very efficient and knowledgeable”

Unitronics is proud to be a part of Waterplay's role in bringing the joy of water to people and communities. "We do more than build aquatic play features. We’ve helped turn crime-ridden downtown parks into family attractions." Says Neaves. "We’ve given new life to abandoned community facilities, bringing kids back to play in them. We work with you to create environments that promote exploration and discovery, fostering imaginative, interactive play."

Story 2 - MSI Tec Uses Vision570™ to Control the City of Tucson's Natural Gas Engine Well Pumps

MSI Tec needed to replace inadequate controllers for the City of Tucson's natural gas engine well pumps. Their main requirements were: Improved screen readability, remote connection to the customer's SCADA system, historical data availability, and an easy to use interface.

Unitronics Vision570™ was chosen and met each of their requirements and more.

MSI Tec Tuscon

Unitronics distributor, MSI Tec, was put to the task of designing a panel to control natural gas engines at the City of Tucson’s (population >500,000) well pumps. The control panels would need to be installed at 43 sites around the city. The cost per engine and shaft can be greater than $400,000. Rapid changes in RPM can cause a large column of water to shift up and down quickly and become a very expensive jackhammer, so the importance of a robust and reliable controller for these control panels was a necessity. The previous controllers that were used had screens that became increasingly difficult to read after a couple of years, which is why they needed to be replaced with a controller that had improved readability. Other necessary requirements were the ability to remotely connect to the customer's SCADA system, historical data availability- to diagnose possible causes of any issues that may arise- and an easy to use interface.

"The Vision570™ was selected because of its ideal size, color touch screen, and terrific feature set for the price." Said Matthew Cronin of MSI Tec. The Vision570™s are mounted in un-insulated panels outdoors.

Tucson’s high temperature frequently climbs above 110 degrees (the record is 117 degrees), and the low often drops below freezing (the record low is 6 degrees). In the three years the panels have been installed, there have been over 250 days with the temperature above 100 degrees. Meanwhile, humidity ranges from an average low of 5% in June to an average high of 75% in July. The high quality of Unitronic's touch screens allowed them to be resilient to the temperature and sun exposure. "The temperature was so hot that we couldn’t keep our computers running for more than 10 minutes…in the shade. In order to update the stations, we used cars with air-conditioned seats. We had to leave the cars running the entire day to keep the air and the seats cool enough for the laptops to not lock up. Even if there were multiple PLCs at a single station, we still had to go put the laptops in the car for a few minutes between each code download to keep the laptops running. Despite this excessive heat, the Unitronics kept running without a problem. And they continue to do so to this day.” said Cronin.

Using Unitronics’ Modbus TCP functionality and a cell modem, Tucson Water’s SCADA system is able to communicate with each well site individually. They are also able to use the V570's SD card functions to write data out every 1-120 minutes depending on user settings- which aids in problem diagnosis. The Unitronics V570 also provides an elegant and reliable 5.7” touch screen for a comparable price to the customer's previous 2-line display system. Utilization of the touch screen system allowed for significantly easier interfacing.

“After the systems were all installed, an upgrade was requested. They systems are not networked, so this required an onsite code change to approximately 40 stations…in July. Interesting hurdles were experienced during this upgrade, but none of them were because of the Unitronics." Said Cronin. "The Vision570 was the most cost effective solution for this application. By combining low cost I/O, communications, PLC functionality, and an HMI in a single package, Unitronics delivered more capability for less money. Because Unitronics is an all-in-one solution, programming is very rapid because no time is spent trying to get the HMI to “talk” to the PLC. This system required a diverse combination of analog inputs and outputs, digital inputs and outputs, and high speed pulse outputs. Unitronics had a flexible and affordable set of I/O cards to accomplish this."

Video --This very cool app story features the SABCO Commercial & Home Beer Brewery

0 Comments


Recommended Comments

There are no comments to display.

Guest
Add a comment...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...