Found unknown device id [solved]

[Rigor69]

Hi !
Thanks for your reply!
I too is of the opinion that it is some timing problem, it partly was corrected when I fixed some faulty dip-switch setting in the westermo.
I enclose the output of the GUI.
The PC side converter is a Westermo MDW-45
The PIC side converters are ISL3294 + ISL3284
Tx enable code is:
(in .h file)

Code:

#define  DEN LATA0   //Data enable

In .c file

Code:

            DEN = 1;
            //Let the DEN settle
            __delay_us(10);
            TXEN = 1;
            CPos = 0;
            while (CPos < Flen)
            {
                TXREG = ComBuf[CPos++];        //Put next char in buffer
                while (!TRMT);                //Wait for data to be shifted out
            }
            //Wait for TSR to send last bits
            while (!TXIF);

Thanks!
Jens