I CAN NOT WRITE EPOS2 [closed]

edit

Hi everybody, I am try to comminicate TI C2000 MCU using epos2 via RS232. I can only read register but can not write. I try to making according to EPOS Firmware Application 3.2 Device Control Flow Chart. My example:

enter code here
int main(void)
{
    .
    .
    .
    Controlword_write(0x80); // Fault Reset = 0x80
    delay(100); // delay 100ms
    Controlword_write(0x06);  // Shutdown = 0x06
    delay(100); // delay 100ms
    Controlword_write(0x07);  // Switch On = 0x07
    delay(100); // delay 100ms
    Controlword_write(0x0F);  // Enable Operation = 0x0F
    delay(100); // delay 100ms

    while(1)
    {
        .
        .
        .
        .
    }
}

I can write these codes but when I read with Statusword_read() function, I see no change. What is this reason ? I can write other code if necessary. Thank you...