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sanyc

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Posts posted by sanyc

  1. UIA-0402N Flow Meter Wiring

    in UniStream: Hardware

    Posted

    Thanks everyone, problem solved and I am now reading very good values.

    The problem turned out to be in the linearization, I set my Y limits to Y1 = 0 and Y2 = 18000, because I read in the manual that at 1'' the Flow Meter could read up to 18000 kg/h.

    Eventually I scrolled the screen inside the Meter and found out that at 20 mA it gives maximum 6000 kg/h. 

    So setting the linearization to Y1 = 1 and Y2 = 6000 solved the problem.

    Thanks again

  4. UIA-0402N Flow Meter Wiring

    in UniStream: Hardware

    Posted

    11 hours ago, sgull said:

    If it is an active transmitter then the transmitter has a separate power input.

    Make sure the 0v of the transmitter power supply is linked to 0v of the unitronics input.

    Thanks Denis,

    Indeed the transmitter has a separate 230V AC power supply. 

    The common on my expansion module is connected to the 0V DC.

    Then a wire from the (-) of the transmitter goes to the current input on the 0204n card.

    The positive from the transmitter I 've tried both connected to the (+) and the (-) of the 24V DC supply with no success.  

    Attached is a photo showing what I did

     

    unnamed.jpg

  6. UIA-0402N Flow Meter Wiring

    in UniStream: Hardware

    Posted

    Hi,

    I am trying to wire a 2 wire 0/4-20 mA analog output Flow Meter to a UIA-0204N I/O module, but It doesn't seem I get the correct reading.

    The output of the sensor is active. From this I understand that I don't need to supply any DC voltage to the two wires of the sensor, thus one goes to 0V and the other to the input of my card. I also have 0V for the common on my card.

    • Do I also need to include a resistor between the wires of the sensor?

    Also, being an active output from the sensor the card needs to act like a current sink.

    • How is that achieved? 

    One last thing:

    • how can I easily determine if its 0-20 mA or 4-20 mA if it doesn't clearly specify it on the datasheet of the sensor?

    Thanks

  7. JZ20-J-R31 Communication Problem

    in Jazz, M91 PLCs and U90Ladder

    Posted

    I have problems communicating with the JZ20-JR31. 

    I am using a usb connection (Port COM 10). A serial connection is not an option for me at the moment. 

    So, I manage to establish connection via Controller --> M90 OPLC Settings --> PC Communication Port Settings --> Get Version.

    Then when I try to download the program it looses connection. 15 minutes ago I was able to download the program but it would still loose connection every 2-3 seconds or so. 

    Now It won't even connect. 

    I tried running U90 as administrator, Nothing.

    I tried changing USB ports, Nothing. 

    What else should I try?

     

    Edit:

    I am using windows 7.

  12. V130 Linearization Issues

    in Vision & Samba PLC + HMI Controllers & VisiLogic Software

    Posted

    Ok guys, first time attempting ladder programming here using a V130-J-R34.  

    I am using AN0 to get signal from a 3-wire pressure sensor. Brown/Blue goes to +/- 24Vdc and the black wire is my signal.

    I get a 4-20 mA from the sensor and according to the default jumper settings of the V130 the AN0 is set to accept current as input.

    I am trying to perform a simple linearization to display how many bars my sensor reads. Since the memory of the analog input is 10-bit this is how I set it up: (see attachment)

    The logic is that being a 10-bit memory the max 20mA corresponds to DEC 1023 and min 4mA to DEC 204. Then this is converted to 0-10 bars.

    However it does not work. My MI0 reads always zero and the output MI1 is stuck at -25. 

    Any ideas here about whats wrong?

    Cheers

     

     

    CaptureONLINE.PNG

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