I/O Point Update rate

[Beno]

If you have not done so already, please review these two (old-but still very valid) forum posts.

Scan time explained - old forum post

peterservo Joined on 03-10-2007 Posts 2 SNAP PAC R1/2 Application Performance? My background is in providing controls for Industrial Automation, particularly Machine Tools and Automated Assembly machines. We are a new Opto distributor and of course we run up against PLC people on a daily basis. I saw a question recently in which a person asked what the scan time of an Opto controller was? The person who answered the question went on to explain that a PAC is different from a PLC. While I un…

Chart Scanning Order

Hello All, On power-up, StartChart A StartChart B StartChart C StartChart D Assumptions: -Power-up Chart is executed only once (not Looped) -All Other Charts (A,B,C, & D) are Looping continuously (with a delay of course) -No other Start or stop chart commands in the strategy -Charts will not be put in to a suspended state (at least programmatically) Is it guaranteed that these charts will execute in this same order as was started (A,B,C,D), when this strategy is being executed in the …

On that second one, be sure and pull down the document linked in there.

Mary’s question at the end is also very valid… What’s the big picture / concern here?

My last comment is if you really want to make a PAC into a PLC, there are two commands that can help:

Move I/O Unit to Numeric Table
Do your logic.
Move Numeric table to I/O Unit