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10. Parameter Register Access
10.1 Parameter Number / Action Output Words
To access drive parameters, 2 output words and 2 action bits are provided in each
drive’s output data structure. The structure of these output words and action bits is
as follows:
Action bits
Bit #:
15 14 13 12 11 8 7 4 3 0
Reserved
Reserved
Req1
Req0
Action bits (offset 8 or 24) Reserved (offset 9 or 25)
Parameter number word
Bit #:
15 12 11 8 7 4 3 0
Parameter number
high byte (offset 10 or 26)
Parameter number
low byte (offset 11 or 27)
Parameter data write word
Bit #:
15 12 11 8 7 4 3 0
Parameter data to write
high byte (offset 14 or 30)
Parameter data to write
low byte (offset 15 or 31)
Note that all locations marked “Reserved” are ignored by the PBDP-110.
Parameter data
Reserved
Parameter number