While the MicroLogix 1000 is the least expensive RSLogix based PLC from Rockwell Automation (starting around $150,) it’s also the most limited.
That in mind, in today’s article we’ll compare the MicroLogix 1000’s “Program Files” with the MicroLogix 1100’s, as they are the only two MicroLogix PLCs supported by the free version of RSLogix Micro we discussed last week.
When you create a new MicroLogix 1000 program, you’ll notice that unlike other MicroLogix, the SLC-500 and PLC-5, you have several Ladder Program Files created for you automatically, instead of just the typical default ladder program 2:
This is because the MicroLogix 1000 has very limited memory, and to accommodate this Rockwell expands the program files to the maximum supported in this processor.
What this means is, you not only can’t create additional Ladder files, but LAD 3, 4, 5, and 16 have already been assigned functions. This leaves Lad 6-15 for user subroutines:
The MicroLogix 1100 on the other hand is more like the rest of the MicroLogix line (and the SLC-500 and PLC-5.)
When you create a new program, you’ll see just the standard LAD 2 program file:
And like the SLC-500 and PLC-5, you can right click on “Program Files” to create new Ladder routines:
Note: While you can create Ladder Programs 3 through 255, you likely wouldn’t have enough memory in the 1100 to actually file all 254 program files with programs of any substantial size:
And that’s it for our look at the differences in Program files between the MicroLogix 1000 and 1100.
If you’d like to learn how to use and program both the MicroLogix 1000 and 1100, I suggest checking out my affordable MicroLogix video training course at PLC Basics Second Edition.
And to see a video of the comparison, check out the below episode of The Automation Minute:
Until next time, Peace ✌️
If you enjoy this episode please give it a Like, and consider Sharing as this is the best way for us to find new guests to come on the show.
Shawn M Tierney
Technology Enthusiast & Content Creator
Eliminate commercials and gain access to my weekly full length hands-on, news, and Q&A sessions by becoming a member at The Automation Blog or on YouTube. You'll also find all of my affordable PLC, HMI, and SCADA courses at TheAutomationSchool.com.
I'm a lifelong Technology Enthusiast who started programing in the early 80's on the new Apple II and VIC-20 personal computers. After earning a degree in Electronics, I worked as a Certified Automation Specialist for 25 years before leaving to focus on teaching at The Automation School, as well as publishing industry news and product how-to’s at The Automation Blog.
Latest posts by Shawn Tierney (see all)
- Automation Q & A for November 15, 2024 (QA023) - November 15, 2024
- Siemens TIA Portal v20 (P227) - November 13, 2024
- Automation Q & A for November 8, 2024 (QA022) - November 8, 2024
Discover more from The Automation Blog
Subscribe to get the latest posts sent to your email.
