TWControls

Yes that is exactly what the high speed counters are for.  While your application is low speed for a high speed counter, you risk missing pulses with regular inputs and ladder logic.

Here are instructions on how to navigate to the fault code.  https://www.theautomationstore.com/rslogix-500-the-big-red-fault-finding-understanding-and-clearing/

It depends on the particular model of the PLC.  Some are 24VDC powered, some are 120VAC powered, and one is 12VDC powered.  What is the complete part number?

He is in the top 3!  Now he must work on a presentation for Automation Fair and will be posting updates on his progress at  https://www.youtube.com/channel/UCqr9nnJswUG2-yAbHxQ8OAw

Thank you!

Thanks!  

Thanks Mickey and Izzybe.  It means a lot!

Amber and I are really excited that our son Michael is a Top 10 finalist in the You Make It Challenge.  The winner will be determined by an online vote.  We would be grateful if you could do the following: 1.  Go to http://youmakeitchallenge.com 2.  Scroll down, find his light blue Sanitation for the World design highlighted in this video and click on it. 3.  Click the ""Vote"" button then select the checkbox saying you're not a robot. 4.  Comment below to let us know you voted. 5.  Share with all your friends, thanks! Thanks TW

The routines don't add any true overhead.  This lesson talks about program flow through routines and how they can be used to organize code. https://www.theautomationstore.com/rslogix-500-program-control-jsr-jmp-lbl-ret-sbr-mcr-sus/

Glad you got it working and thanks for letting us know.

Yes, that should solve your problem.

I just wanted to make sure the Channel 0 wasn't setup for DH-485.  Your setup should work from there.  Have you gone into Device Manager and verified your USB to serial adapter is on COM 4?  Also what cable are you connecting to the SLC with?