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About Modiconbob

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  1. Communication

    Yes, the baud rate is excessively high. What cable are you using? I am assuming that you have no duplicate addresses. What is the terminating resister value? What is the resistance across the network cable?
  2. Modicon 984

    That is correct. But even on the "master" rack  you do NOT need to kill power to replace an I/O card.
  3. The original 200 series with the "knurled pins" allowed for maximum I/O flexibility, but some folks didn't use common sense when setting them as you found out!
  4. Crossbow, you are correct! NXT will NOT communicate with a 484. A 484 is asynchronous and also needs a hardware asynchronous to serial convertor (Modicon J470).
  5. Modbus Plus to PC

    Collinsd70, you are correct. They work well but are costly!
  6. Once the processor has lost its' memory, the comm addresses default back to 1 for MB & MB+. Once the program is reloaded and the processor is started to Run, the addresses will be set by the newly reloaded program.
  7. What address are you attempting to connect? If the unit is defaulted, it has returned to address 1.
  8. Modicon 984

    You do not need to kill power to replace an I/O card. You can replace it "hot".  You only need to kill power on the processor, remote I/O interfaces, power supplies etc. The J890 gets updated from the processor on power up. nothing to reload there. Also, no programming changes for replacement card.
  9. OK. Sounds great! I think the other way, I think the Modicon is the best....of course I worked for them for about 20 years too! LOL You are welcome to contact me directly at my office via email bobculley@deltaautomation. Thanks! Bob
  10. Be certain that your communication parameters are set up correctly. (serial parameters,UBS, ethernet, etc). To just download, go to direct to online (dto), once online, you should be able to download the program. Let me know if you need more help.  I can get on the phone with you if needed. Good luck.
  11. What type of trunk cable (RG-6-RG-11-quad shield?) are you utilizing? How many drops are on the sytem? Do you have a rough idea of the total length of the cable? What test equipment have you used to trouble shoot? Bob
  12. Set the port that you are communicating to the programming terminal as a slave.
  13. This should work OK. Not sure I'm following the actual reason for doing that, but you can manipulate the pointer either way. Almost nothing that you can program in a Modicon Quantum will cause processor faults..... the logic entered may not function as you intended, but the PLC will continue to run and process the other logic.
  14. ProWorx 32 isn't as terrible as it was originally. It's still NOT NXT though! Since it sounds like you will be utilizing it mostly for maintenance purposes now and for the foreseeable future, it shouldn't be too bad to convert. It is as if you will be utilizing a completely different PLC language. There is no similarity between NXT and 32. It just takes some getting used to. The configuration set up screens and traffic copping are a little cumbersome, but again it sounds as though you're not going to be doing program development on these units. The ladder logic screens are not too terribly bad. The comments etc will convert over with some degree of frustration but do work. Schneider really has no other option for it's steadily declining market share....... Good luck! Bob
  15. Modsoft was never designed to work with the 484. In fact, Modicon never produced any PC based 484 software. Taylor had a DOS based program that worked well. Currently there are two ways to get a print out of your 484 logic. One is with the old P190, J470, and the P190 tapes, and a serial printer. The other is to use the Taylor software, a J470 and a regular printer. I have both of these set ups here at my office. If you'd like, email or call me and I'll be glad to assist you. Thanks, Bob