--- title: "OptoNews Tech tip: Mini-lessons on PACs, PAC Control" description: New OptoForum for learning about tables, subroutines, protocols built into PACs, and more image: https://blog.opto22.com/hubfs/OptoNews/101_lessons_subscribe_640x221.png --- - [Log in](https://www.opto22.com/logon?returnurl=%2f) - [Register](https://www.opto22.com/Special-Pages/Logon.aspx) - [Your Cart](https://www.opto22.com/Checkout/Shopping-Cart) - [Contact Us](https://www.opto22.com/support/contact-us) [![Opto 22 Logo](https://blog.opto22.com/hubfs/opto22_lightsilvergradient_800px.png "Opto 22 Logo")](https://www.opto22.com) - [Products](https://www.opto22.com/products) - [What Do You Want to Do?](https://www.opto22.com/products/what-do-you-want-to-do) - [groov RIO](https://www.opto22.com/products/groov-rio) - [groov EPIC System](https://www.opto22.com/products/groov-epic-system) - [Case Studies](https://www.opto22.com/products/groov-case-studies) - [Product Selector](https://www.opto22.com/products/product-selector) - 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[Technology Partners](https://www.opto22.com/community/technology-partners) - [Education Partnerships](https://info.opto22.com/partnering-in-education) - [Opto Blog](https://blog.opto22.com/) - [Opto Forums](http://forums.opto22.com/) - [Events](https://www.opto22.com/community/events) - [Articles](https://www.opto22.com/articles) - [Log In](https://www.opto22.com/logon) - [Register](https://www.opto22.com/Special-Pages/Logon.aspx) - [Your Cart](https://www.opto22.com/Checkout/Shopping-Cart) - [Contact Us](https://www.opto22.com/support/contact-us)   # OptoNews Tech tip: Mini-lessons on PACs, PAC Control # OptoBlog # OptoNews Tech tip: Mini-lessons on PACs, PAC Control Posted by [Jean Femia](https://blog.opto22.com/optoblog/author/jean-femia) on May 21, 2015, 9:27:00 AM - [Tweet](https://twitter.com/share) [![PAC Project Automation Software Suite](https://blog.opto22.com/hubfs/Products/PACPROJECTBAS_p_200.png "PAC Project Automation Software Suite")](http://www.opto22.com/community/forumdisplay.php?f=14)You already know that the OptoForum is a great place to get your questions asked and answered.  It's also a great place to learn about using tables, subroutines, and pointers in PAC Control; built-in protocols like SNMP in SNAP PAC controllers; and more.  The **new forum** called**[101 Mini-Lessons](http://www.opto22.com/community/forumdisplay.php?f=14)** gets you started learning about a variety of subjects: - Need a command that isn't in PAC Control? You can [create your own command](http://www.opto22.com/community/showthread.php?t=696).  - Would you like to have an Opto 22 SNAP [PAC controller send SNMP traps](http://www.opto22.com/community/showthread.php?t=907) to other software you have? Here's how to set it up. - How could a friendly neighborhood controls engineer make sure that the 3 Bears' porridge is neither too hot nor too cold? Why, very [efficiently with pointers](http://www.opto22.com/community/showthread.php?t=684), of course. - What's a [communication handle](http://www.opto22.com/community/showthread.php?t=673), and how does it relate to serial communication, Ethernet communication, and writing to files on your network?  - What's the difference between a string variable and a string table, and when would you want to use tables? This [introduction to tables](http://www.opto22.com/community/showthread.php?t=669) answers your questions.  More mini-lessons will be added, so be sure to check back. Or better yet, subscribe to this forum so you won't miss additional lessons: in the forum, click Forum Tools and choose Subscribe. [![OptoForum - subscribe to forum](https://blog.opto22.com/hubfs/OptoNews/101_lessons_subscribe_640x221.png "OptoForum - subscribe to forum")](http://www.opto22.com/community/forumdisplay.php?f=14) [![See the mini-lessons forum](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/439485/3283f91c-5a73-4ffb-8d7e-4055eb64b14c.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/439485/3283f91c-5a73-4ffb-8d7e-4055eb64b14c)   --- #### OptoNews May 21, 2015 - Read more in this issue: - [groov 3.0 adds event notifications & more](https://blog.opto22.com/optoblog/optonews-groov-3) - [New prices on groov 3.0 platforms](https://blog.opto22.com/optoblog/optonews-new-platform-prices) - [PAC Project update fixes vulnerabilities](https://blog.opto22.com/optoblog/optonews-pac-project-vulnerabilites)   Topics: [Tips](https://blog.opto22.com/optoblog/topic/tips), [optonews](https://blog.opto22.com/optoblog/topic/optonews), [PACs](https://blog.opto22.com/optoblog/topic/pacs), [OptoNews 2015-05-21](https://blog.opto22.com/optoblog/topic/optonews-2015-05-21) ### Written by [Jean Femia](https://blog.opto22.com/optoblog/author/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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