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gerard339

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Posts posted by gerard339

  1.  
    Hi,
     
    I am using a current simulator to input a 4-20mA signal to AI0 of a IO-A14-AO2.
    The raw data is doing the opposite of what I am expecting.
    As I increase the current, the raw data decreases, and visa-versa: the value of MI 0 goes down as mA input signal goes up.
    I tried reersing the signals but it does not work either - do you have any idea what may be happening here?
    I tried it with both current and voltage signals. 
     
    image.png
     
     
  2. Hi,

    Thanks for you quick reply. Yes, cable is correct and plugged in the correct way. Yes, the modules are in same order in HW configuration as they are DIN rail.  I can download program to PLC but it's like the plc is not communicating with ex-a1.  I have branches off 0v supply to the ex-a1 and v570 - sounds like a longshot but could this be a cause? I originally connected v570 to ex-a1 with a regular cat5 patch cable. Could this have damaged the ex-a1?

    Thanks,

    Gerard

  3. On 8/19/2010 at 8:54 PM, brdle2002 said:

    I have tried now tried 2 cables and two EX-A1. I also tried the blank program with hardware selected. I am trying to force an output to 1 with no success.

    When I power-up I get the Comm. LED to flash once real quick but thats it. The RUN LED is flashing on the expansion module

    V130-33-R34 > EX-A1 > IO-DI8-RO8 is my setup. Someone please help.

    Hi,

    Did you have any success getting your EX-A1 to communicate with the I/O modules? I'm still getting green lights as seen in video - any ideas what it might be?

    I'm using a EXL-CAB295 cable to connect from OPLC to Adapter.

    blinking green.xspf

  4. Hi,

    I have to complete a program by the 28th of this month for work. The project is installing a hmi/plc on a pizza line to improve efficiency. I am in the middle of programming it but I am beginning to find myself getting bogged down very easily. I need help with programming. I have a ex-rc1 which threw a spanner in the works with extra programming I don't need. Is there anyone who can help with my program - it's not very complicated, I'm just not very good at it.

    Gerard

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