How to control yaskawa varispeed F7 VFD using labview ??

I want to control the frequency of VFD (Yaskawa varispeed F7) using labview.
 The vi should be like I can know the current freqency and able to change it.
What are the possibilities???
Please reply.....
Thanks & regards
Naren

The yaskawa driver has the registers tables in Hexadecimal, i map them in decimal in labview with an offset of +1 so:
to access register 2h -->        02h = 02d = 400003
                           17h-->       17h = 23d = 400023
I read and write to this registers:
To control (RUN-STOP-REVERSE)       01H = 400002
To set freqency                                   02H = 400003
To monitor (at_zero-run-reverse)            11H = 400017 addressed by bit 400017.1(at_zero);    400017.2(run);       400017.3(reverse)
the registers i cannot read are              26H = d38   to read the frequency
                                                         27H = d39   to read the ouput current
                                                         28H = d40   to read the ouput power
I have tried with all instructions (000026; 300026; 400026) even with the array option and i still cannot read them.

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