KR2 kss 4.1.4 serial comunication reads but doesn't write

    I have a KRC2 with KSS 4.1.4 and I am trying to connect an external HMI screen via serial using com3.

    In order to do this, I enabled the com3 port in hw_inf.ini and changed the settings of the port to fit the screen settings.

    9600, proc 4 (XonXoff), stop bit 1, Xon value = Xoff value = 0.

    On the other hand, I am trying first to connect the robot to my laptop using a USB-DB9 adapter and a db9 female -db9 female connecting:

    db9 PC side ------- db9 robot side

    1+4+6 1+4+6
    2 ------------------------------- 3
    3 ------------------------------- 2

    5 ------------------------------- 5

    7+8 7+8

    9 9


    The problem comes when I try to send data with CWRITE.

    MW_T=#SYNC ; Initialize synchronous transmission
    MR_T=#COND ; Initialize active reading
    TIMEOUT=6.0 ; Initialize timeout after 3 seconds
    OFFSET=0 ; Read from 1st character
    CWRITE(HANDLE,SW_T,MW_T,"%c%c%c","c","o","n")
    ; the status component SW_T.RET1 checks whether the transmission was successful
    IF (SW_T.RET1<>#CMD_OK) THEN
    HALT ; transmission error
    ENDIF

    The thing is that I know I'm passing this part of the code successfully because right after that I have a CREAD command that is working perfectly (so we also know that COPEN is working too), and also SW_T.RET1 has the value #CMD_OK so the robot thinks that it sent the information.

    I also checked using telnet if something was wrong but it shows that it did send the data too

    The USB to db9 male is also working fine because I can connect both the laptop and the HMI without any problem.

    I also tried with a different hardware (a whole new PC with the same HDD)

    If anyone has any idea I would appreciate it a lot.

    Thank you,

    Jorge

    so you have code that runs, terminal confirms that data is sent and the problem is receiving on another computer that uses USB<>RS232 adapter?
    your crossover cable looks fine. are you sure your USB<>RS232 interface is installed correctly? (correct driver)
    did you test it using loopback adapter?

    1) read pinned topic: READ FIRST...

    2) if you have an issue with robot, post question in the correct forum section... do NOT contact me directly

    3) read 1 and 2

    I tried using a loopback but still nothing. I checked pins 4, 6 and 1 and it seems that none of them are connected (voltage between those pins and gnd is close to 0 but not excatly 0). is that even possible?

    In that case, I think that my krc2 is not sending any info because DSR is low all the time even tho I have those 1+4+6 connections.

    are you sure your USB<>RS232 interface is installed correctly? (correct driver)

    are you talking about the driver in the KRC or in the other computer (receiver)?

    If its the KRC one, how do I check that?

Advertising from our partners