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About b_carlton

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  1. Find a Tag in RSLogix 5000

      I think you meant Local:7:I.Data.4.  (Swapped 4 and 7)
  2. Yes, timers and counters in the SLC500 and Micrologix worlds consist of 3 16 bit words One contains the preset time/count. Another contains the current time/count. The third is used as individual bits and, at least in the timer, a small numeric section to compare with the system real-time clock. Refer to chapter 8 in this manual for more info.   https://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1766-rm001_-en-p.pdf  
  3. The SLC500 and Micrologic do not have the ability to set up user defined structures. They have some items (counters, timers, strings and others) which are structures. In the Compactlogix User-defined types (UDT) can be set up. Google for UDT and RSLogix.
  4. Ethernet Information

    First a link to the air pressure manual would be helpful.
  5. up-down counter

    Whatever works in your application is right.
  6. up-down counter

    I found it easiest in a similar application to just do the ADD and SUB blocks and not use a counter at all. Actually mine was 4 separate Up counts and one Down count input. With the complexity it was more understandable to group the 5 rungs together with 4 up counts followed by the one down count.
  7. up-down counter

    If using ADD or SUB make sure to one-shot the conditions to do the ADD/SUB only once for each.
  8. up-down counter

    If multiple down counts occur simultaneously what do you expect as behavior? Will just one down count be appropriate?
  9. Why "RMS" Analog Input?

    I could see this for a discreet AC input or output module but I see no reason for an analog module. Do you have an example or a link to such cards?
  10. Modicon micro Comms Issue

    This area is for PLCs from Automation Direct. Please re-post in the 'Modicon' area
  11. I'm sorry that I can't help further. The only applications I worked on were much slower. I don't know if there is a module with PLS (Programmable Limit Switch) capabilities such that processing of counts is done in the counter card itself and directly controls it's own high speed outputs. Good luck.
  12. It will count and keep track of each pulse but the rpi will control how often the total is reported to the CPU. Your scan time will control how often your program can act on the total as reported.
  13. You didn't mention your program's scan time. You would still have to deal with that. The number of pulses between actions on them will depend on the greater of the rpi or the scan time. You may have to do more research on high speed processing.
  14. 60Khz is a 16.66 microsecond per pulse period. What is your scan time? At an rpi of 2 ms you get about 120 pulses per update. Is that ok?
  15. Dispersion of an array

    Since 'dispersion' is a general concept you might use standard deviation (STD)