The latest addition to our lineup of RTD analog temperature input modules is the SNAP-AIRTD-1K. Its two input channels connect to 1000 ohm platinum RTDs and accommodate a temperature range of -200 to +850 degrees C. This type of input is suitable for 2- and 3-wire 1000 ohm probes typically used in HVAC systems.
You'll use this module with a SNAP PAC brain or R-series rack-mounted controller and a SNAP PAC rack. Typically used in a SNAP PAC System, the module can also be part of an intelligent remote I/O unit for Allen-Bradley PLC systems or for PC-based I/O.
While you're checking out the new SNAP-AIRTD-1K, also take a look at our other RTD temperature input modules:
- The SNAP-AIRTD handles the same -200 to +850 degrees C temperature range and uses 100 ohm platinum inputs.
- The SNAP-AIRTD-10 handles a temperature range of -180 to +260 degrees C and uses 10 ohm copper inputs.
Note that all three modules can also be used to make high-resolution resistance measurements.
You've probably watched how New Belgium Brewing makes that great Fat Tire Ale and Fedora Farms processes walnuts. Or maybe you've read about NBP's aircraft control and lighting systems or how SUPERVALU saved a ton of money on energy costs at their refrigerated distribution centers.
"A case study is a great way to showcase your business and the automation problems you've successfully solved," says David Hill, Opto 22's new Marketing Communications lead.
"Basically you just talk with us about your application. We write up the story, make the video, and place the case study in industry trade publications and online.
"With very little time and no cost, you get a video and a full-color article you can use on your website and for promoting your products and services."
Would you like to promote your business with a case study? Find out more by reading about the Case Study Program. Or contact David Hill for more information.
Phone: 800-321-6786 or 951-695-3010
We've talked a lot about energy monitoring and how acquiring detailed data about the energy you use is a must for controlling energy costs.
The OptoEMU Sensor energy monitoring appliance is a great tool for acquiring this data, and it sends the data directly to online services such as Pulse Energy.
But what if you already have an Opto 22 SNAP PAC controller, and you just want to add a module or two to get energy data? Can you still see the data online?
Of course you can, and here's a sample PAC Control flowchart that shows you how to move that data from PAC Control to Pulse Energy.
All you have to do is download the sample file, import the chart into your PAC Control strategy, and follow steps in the included technical note to configure a Pulse Energy account and use the chart.
Note that you need to have a Pulse Energy account (which you get from the Pulse Energy website), a SNAP PAC controller, and PAC Control version 9.0 or newer.
- To collect energy data from electrical panels and equipment, use SNAP power monitoring modules: SNAP-AIPM is for single-phase inputs, SNAP-AIPM-3 and SNAP-AIPM-3V are for three-phase. The SNAP-AIPM-3V uses the safer 3 volt CTs.
- To collect energy data from pulsing devices, you could use a SNAP-IDC5-SW.
There's more than one way to increment a numeric variable in PAC Control. Which way is better?
You could just add one to the value of the variable, as in this OptoScript code snippet:
variable = variable + 1;
Or you could use the built-in command, Increment Variable, like this:
Our resident OptoExpert (the engineer who wrote the underlying code for PAC Control) recommends you use the built-in command, and for two reasons:
First, the operation performed by the command is guaranteed to be atomic. That means the whole operation is done at once and can't be interrupted midway through by another task.
Second, it's faster. The variable = variable + 1 method first requires that the value of the variable be fetched; then the addition operation happens, and finally the new value is stored back to the variable. In contrast, the built-in command increments the variable in a single operation. Voila! It's done.
The same thing is true when you decrement a variable: use the built-in command for a fast, sure operation.