Michael Lloyd

MrPLC Member
  • Content count

    686
  • Joined

  • Last visited

Community Reputation

38 Excellent

1 Follower

About Michael Lloyd

  • Rank
    Expert
  • Birthday 06/01/58

Profile Information

  • Gender Male
  • Location Texas
  • Country United States
  • Interests Photography, Long Range Shooting, Reloading, Fishing, Hunting

Recent Profile Visitors

3526 profile views
  1. Compact Logix Ladder

    Yes there is. Well... kind of, you have to have Function Block licensing. There's a function block called FGEN (Function Generator) that is wonderful for doing what you want to do. I've used it for Air/Fuel Ratio control, valve characterization, etc. If I remember correctly (been over a year since I've used it), when you make the tag for X and Y you need to make it for number of characters +1 or it will fault.  Or you can roll your own un Structured Text. Y = mX+b... slope of a line for each segment of the non-linear curve. I'd use FGEN :)  
  2. Rslogix 5000 add-on instruction

    I used to lock AOI's but I removed all of the protections years ago so I don't remember what that looks like. I'd bet that it's a license issue if it's a structured text based AOI
  3. Messages between CompactLogix and SLC 5/03

    The cheapest version of their protocol converter will work for what you are doing. I think I gave you DSPGT. That one has a webserver and other fluff that wouldn’t be useful to you. I don’t know how close they are together but an AO wired yo an AI would work if they are in the same panel or near each other.  If you’re using UDT’s in the CLX and have trouble pulling the tags (because you can’t see them in the tree) it’s because you to tell the RL what the UDT contains. I’d have to look in the software to give you more detail. It’s easy to add the UDT but not necessarily easy to figure out the first time.  Their tech support has always been outstanding       
  4. Messages between CompactLogix and SLC 5/03

    Maybe. The Red Lion is under $900 and my kid could program it to do what you need it to do. Actually he does but I don’t think 33 qualifies him to be a kid :)
  5. Messages between CompactLogix and SLC 5/03

    I would use a red lion DSPGT protocol converter. It’ll “speak” CLX tags via Ethernet and SLC registers through the serial port
  6. MNET to OMNI

    I’m traveling at the moment so I can’t look at what I’ve done in the past, but as I remember it, Omni uses standard Modbus protocol. I haven’t used an MNET card in a long time. Red Lion DSPGT’s work as well and cost less.  OMNI has a nice little free modbus polling program. You could poll a register, view it in bytes or bits, compare it to what you are seeing  
  7. CLX Message to SLC error...

    I'll have to pull up both programs when I'm at work to see how I resolved this issue. The cell modem (either or both ends) issue I had went away when I port forwarded the PLC IP to port 2222. This post was a different problem than the cell modem and I don't recall if it was resolved and how it was resolved if so.
  8. SLC 5/04 Output Issues

    It would be easier to help if we could see the ladder logic Although your test method should work try using a button And last, are you sure that you aren’t trying to control an output from more than one rung. Ie one rung turns it on but somewhere else it’s being turned off. It happens more often than you would think. Some of us have even made that mistake more than once. It’s really fun when you do it in big program that uses multiple languages. :) Troubleshooting is half the fun i never say that when I’m troubleshooting     
  9. Siemens S5 to Rockwell Conversion

    Cryptic machine code language, aka STL,  is what you program the S5 with. It'll do some ladder but what you see in the OP's most is what you get when you dive into the land of the S5. I actually like them but kind of like I liked a really annoying girlfriend once... Fun to play with but not a keeper :o)
  10. Copy INT into second half of a DINT

    There is a command for that in CLX but you didn't mention which PLC you are using. BTD - Bit Field Distribute Page 384 http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1756-rm003_-en-p.pdf
  11. Micrologix with 2 ethernet

    We have a few 1761-NET-ENI's on intracoastal platforms in the GOM. I'm glad they stopped making them   The port server to serial port idea is pretty good. If you don't have the RSLogix 5000 software the price differential is a lot higher than twice.
  12. Subroutine

    I completely agree but I also like to look over other peoples programs and see how they did "things". And of course sometimes I scratch my head and wonder why they did "things" :)
  13. Read Modbus holding registers with RSLogix?

    I'd use a Red Lion DSPGT and write the Modbus registers to / from PLC tags. Cheap and easy plus you can talk to numerous Modbus devices
  14. Help: Basic Program Question

    If you don't put a one shot between the button and counter the switch contacts will "bounce" and you'll get a burst of counts.
  15. Etherhet problem compactlogix 1769-L32E

    Make sure your computer and PLC are using the same IP address and Subnet Mask. Ie- If the PLC IP is 10.10.10.XXX and subnet mask is 255.255.xxx.xxx then the PC IP address had to be in the range of 10.10.10.XXX and subnet mask is 255.255.xxx.xxx I usually forget to change my computer IP to match the PLC range a few times a year. Other than that I've never had a problem with BOOTP