OptoBlog

Jean Femia

Jean Femia writes about technical subjects and has focused on automation and control systems for more than 15 years. She likes learning about technology and taking corners in her Honda S2000.
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Recent Posts

OptoNews: See you at ATX West Expo

Posted by Jean Femia on Feb 3, 2016 4:14:24 PM

Join us next week in Anaheim, California, for the 2016 ATX West Expo.

The Expo showcases cutting-edge technology in manufacturing automation, and you can get a free pass

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Topics: groov, optonews, Events & conferences, OptoNews 2016-02-03

OptoNews Tip: IVAL and XVAL

Posted by Jean Femia on Feb 3, 2016 4:13:28 PM

If you use PAC Control to develop your control programs, here's a question you may have: What the heck are IVAL and XVAL?

You see these terms in Simulation commands such as IVAL Set Analog Point, and you also see them when you inspect I/O points in Debug mode.

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Topics: Tips, optonews, PACs, PAC Project, OptoNews 2016-02-03

OptoNews: New compact breakout board saves cabinet space

Posted by Jean Femia on Jan 20, 2016 4:12:04 PM

If you use high-density 32-point SNAP digital I/O modules, you'll be interested in our latest breakout board: the SNAP-UDC-HDB.

The small footprint of this new board makes it ideal for use in cramped areas. Just 3.32 x 3.95 x 2.27 inches high (8.43 x 10.03 x 5.77 cm), the SNAP-UDC-UDB fits in tight places but still gives you room to wire all 32 points to field devices.

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Topics: Discrete control, Machine builder, optonews, New products, Integrators, I/O, OptoNews 2016-01-20

OptoNews: groov 3.0e update released

Posted by Jean Femia on Jan 20, 2016 4:11:14 PM

We've just released a new version of groov Build and View, version 3.0e.

This update fixes some issues you may have seen in groov when used with browsers Chrome 48 and Windows 10 Edge 25.

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Topics: groov, Updates, optonews, Windows 10, OptoNews 2016-01-20

OptoNews: Thank you for honoring us as your First Team

Posted by Jean Femia on Jan 20, 2016 4:10:33 PM


The Automation World Leadership in Automation First Team Honorees are chosen solely by write-ins from readers, rather than prompted answers from a list of companies.

That's why we feel especially honored that Opto 22 received First Team awards in two categories for 2015: Data Acquisition Hardware and Mobility.

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Topics: groov, optonews, I/O, Awards and recognition, OptoNews 2016-01-20

OptoNews tip: How to test an AC SSR

Posted by Jean Femia on Jan 20, 2016 4:09:49 PM

Solid state relays (SSRs) are simple, reliable devices. If one stops working, typically it just refuses to turn on or off.

How do you test it to see if it has failed?

If you're used to testing mechanical relays, you'll find an SSR requires a different testing method: it requires a load.

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Topics: Tips, optonews, SSRs, OptoNews 2016-01-20

OptoNews: New board adds G4 power to SNAP HDD modules

Posted by Jean Femia on Jan 6, 2016 4:47:03 PM

How do you sense or switch loads up to 3 amps with each of the 32 points on a SNAP high-density digital (HDD) I/O module?

Here's how: the new SNAP-UDC-HDB-G4 breakout board.

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Topics: Discrete control, optonews, New products, I/O, OptoNews 2016-01-06

OptoNews: New tool helps tune PID control loops

Posted by Jean Femia on Jan 6, 2016 4:46:04 PM

In automation, proportional integral derivative (PID) control loops are common, useful, and tricky to get right. 

Each loop is different and each requires individual tuning for maximum effectiveness.

Now here's a new tool to help you tune your PID control loops: our online PID Control Loop Tuner.

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Topics: Energy management, Process control, optonews, Integrators, Building management, OptoNews 2016-01-06

OptoNews: Top 5 blog posts for 2015: security, PIDs, and more

Posted by Jean Femia on Jan 6, 2016 4:45:03 PM

Did you miss any of these? Here are the 5 OptoBlog posts our readers found most interesting in 2015:

1. Sinking and Sourcing in DC Circuits

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Topics: Process control, Internet of Things, optonews, PAC Project, OptoNews 2016-01-06

OptoNews tip: Getting weekly, monthly, yearly totals

Posted by Jean Femia on Jan 6, 2016 4:44:14 PM

We've talked recently about digital and analog totalizing: getting total running values for on-time, flow, power production, and so on. 

The next step is using those totals in your PAC Control strategy—and in your groov mobile operator interfaceto get the information you need.

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Topics: Process control, Discrete control, Tips, optonews, PACs, PAC Project, OptoNews 2016-01-06

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