Allen Bradley PLC Sequence SQI SQO Programming Tutorial Part 9

[@75blackviking]

Thanks for the great tutorial, Tim! Your channel always turns out great content.

[@TimWilborne]

I'm glad it was helpful. Enjoy your weekend!

[@Justinsatiable]

I've been programming for 20 years and I've rarely seen sequencers implemented but I've seen a dozen sequencing methods that are much more coherent and readable by the average maintenance person.

[@TimWilborne]

I agree!

[@jorgef.morales3038]

I can't find SQO instruction on Connected Components Workbench... :( Could you help me?

[@TimWilborne]

This was my least recommended method of sequencing. None of them other methods peaked your interest?

[@jorgef.morales3038]

@@TimWilborne For sure! The other methods are functional as well for me, but i'm working on a PLC migration from SLC 500 L20 to Micro820, the technicians who will be working on maintenance of that machines use to do SQO methods, so I want to continue using that method for their comfort... So, there's no way to use SQO con CCW for 820?

[@OldePhart]

Why add the AFI after the XOR at all?

[@TimWilborne]

This one isn't completely fresh on my mind now so going off of memory...it prevents someone trying to understand the rung from thinking the XOR has some functionality in the ladder logic program. Second, it would short around the SQI which would either cause the SQO to increment it's control position when the SQI's conditions are not met not increment at all since the SQO would not see a true to false transition of the SQI.

[@BlueYosi]

I’m learning how to program sqi and sqo at work right now because we have alot in the programs but they are also inside an aoi lol.

[@TimWilborne]

Interesting

[@BlueYosi]

@@TimWilborne They can be difficult to understand but think the AOI is to prevent maintenance from going in and changing things but there are easy to read input and output maps outside in the reg routine. All the sequencer tags are UDTs also. I guess it’s an easier way to program and make changes if you understand programming but not for the average maintenance person.

[@Jay-tr3px]

Thanks again for this tutorial. I was wondering if you can make a video tutorial about using a GSV or SSV wall clock to schedule some maintenance PM schedule to run a motor?? And to record start, stop and fail in that program?? Thanks again Tim.

[@TimWilborne]

Great suggestion! I'll put it on the list.

[@Jay-tr3px]

@@TimWilborne Thanks Tim. I look forward to it! 👍

[@joew4202]

Just battled a machine for 10 hours today that used SQO for every output in the machine. Not most any machine, a 12 head VFD driven filling machine. I still haven’t fixed it i can only tell you it’s stuck at sequence 15 then Resets itself. The guys that wrote it, $175 hour to talk to you.

[@TimWilborne]

The XOR instruction in this video is the key to understanding SQI SQO sequencing.

[@Futbolnews12]

Hey Tim, I think you will not be able to show #12 with your finger :)

[@TimWilborne]

😜