Grocer SUPERVALU reduced their energy costs through monitoring and also gained revenue through a sophisticated demand-response program.
One of the largest companies in their industry, SUPERVALU has huge refrigerated distribution centers.
Our latest case study shows how they've reduced energy consumption and saved over $150,000 per year in just two of those centers, using an Opto 22 system installed by Advanced Energy Control (AEC).
In addition, the system also provides automation for the lucrative demand-response program, run by Net Peak Energy Group.
First, the utility provider pays SUPERVALU for their agreement to reduce demand in case of an emergency. In addition, SUPERVALU curtails their energy use during periods when energy prices are high and effectively sells energy back to the utility provider at a profit.
Read the SUPERVALU case study.
We've had some good questions and answers lately in the OptoForum. Here's one for novice PAC Control programmers: how the Start Chart commands in the Powerup chart really work.
Some handy tech tips came out of this topic.
Tip 1. Build your Powerup chart with flow-through logic, not looping logic. That means the Powerup chart should set initial values for variables, perform setup commands, and start the main charts. Any logic that needs to loop should be handled in a separate chart, not the Powerup chart. Also, there is no need to use the Stop Chart command at the end of a chart; if there is no more logic, it will stop by itself.
Tip 2. Always check the PAC Control Command Reference (form 1701) or Command Help within PAC Control so you know what the return values (the status codes) mean. In the case of the command Start Chart, status codes are:
0 = success
-5 = failure
Tip 3. Some charts in your strategy should have looping logic—for example, alarm control, I/O that needs continuous monitoring, communication with an external program or device.
Tip 4. Always add a Delay command in a looping chart. As one Forum poster put it, "The chart with no delay is like the kid in the back seat asking: "Are we there yet? Are we there yet?" over and over. You want him to maybe ask you every 20 minutes max." Same thing with the controller: put in a reasonable delay so the controller can do its work efficiently without the distraction of unnecessary repetition.
Questions on the OptoForum range from novice to expert. Join us there to post your own questions and help answer others. Be sure to sign into your My.Opto22 account so you can see all images and post.
If you're on Facebook, you can get immediate updates on Opto 22 products or news without searching our website or even waiting for OptoNews.
All you have to do is click the button to Like us:
Our wall posts and Facebook updates will then appear in your daily Facebook news feed, with links if you want more information.
You can also communicate with us directly on our Facebook page, by commenting on posts or sending us a message—and see what other people are saying as well.
Primero en inglés, luego en portugués y ahora en español, nuestro papel blanco de Automatización y La Red Inteligente (Smart Grid) ha sido muy útil.
El papel blanco discute el futuro del Smart Grid en los EE.UU. y luego sugiere modos prácticos para que las empresas industriales y comerciales puedan reducir costos de energía ahora mismo, sin tener que esperar a un smart grid.
Nuestras gracias a Norma Rodriguez de Opto 22 y a Juan Pablo Gallay de Interlog, el distribuidor de Opto 22 en Chile, por su asistencia en la traducción.
Si todavía no ha leído el papel blanco (o si desea volver a leerlo), aquí está: Automatización y La Red Inteligente (Smart Grid): Gestión de Energía.
First in English, then in Portuguese, and now in Spanish, our Automation and the Smart Grid White Paper has proved useful.
The white paper discusses the future Smart Grid in the U.S. and then suggests practical ways in which industrial and commercial businesses can start reducing energy costs now, without waiting for a smart grid.
Our thanks to Opto 22's Norma Rodriguez and to Juan Pablo Gallay from Interlog, Opto 22's Distributor in Chile, for providing the Spanish translation.
If you haven't read the white paper yet (or want to read it again), here's your chance:
(Español) Automatización y La Red Inteligente (Smart Grid): Gestión de Energía
(Português) Automação e a Rede Inteligente (Smart Grid): Gestão de Energia
(English) Automation and the Smart Grid: Energy Management Today