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Pro-Face LM4201 TADAC - I/O wiring

Discussion in 'Microcontrollers, Programming and IoT' started by Kaare Jenssen, Feb 22, 2017.

  1. Kaare Jenssen

    Kaare Jenssen

    6
    0
    Feb 22, 2017
    Hi.

    I have just got a Pro-Face LM4201 TADAC PLC from my employer, and has been asked to learn how to use it. After getting it to upload projects correctly, I have learned the basics of ladder programming, and the fundamentals of the software GP Pro EX. It all seems intuitive and easy enough to work with, even coming from a C/C++/assembly programming background from ARV and ARM chips.

    That said, I have problems with getting the I/O to work:

    I have managed to make ladder logic that makes a button on the display switch a lamp on and off, so I mapped the input to a variable and swapped the screen-button with the variable name of the physical button mapping.

    I connected a button to I3 and 24V, but the button does nothing. If I measure the I3 against +, I get 0.6V?

    Could someone help me get this thing wired up with a button? I have searched all the web, and I find how to wired it, but I am not shure if I can use the PS +/- for the logic, or if I need some COM or source connection on the PLC. I see there is a float gnd on the power in to the device. Should this be connected? Am I wrong in assuming I should get 24V when connecting 24+ to I3 if the pin is enabled? Is there something more to be done to enable a pin, than to map it?

    Sorry for all the rambling questions, but I am at a loss, and this whole industrial plc thingy is brand new to me, ladder logic included :)
     

    Attached Files:

  2. Kaare Jenssen

    Kaare Jenssen

    6
    0
    Feb 22, 2017
    don't seem to be able to update or edit the original post, so here are some more pictures...
    testbuttonlamp.PNG
    ladder and input mapping.PNG
    io driver.PNG
     
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