Reference Manual
PMAC 2 Software Reference
PMAC I-Variable Specification 113
In this mode, bits 16 to 21 of Ix81 specify the number of bits to be read, starting with bit 0
at the specified address. In this mode, they can take a value from $08 to $18 (8 to 24).
In this mode, bit 22 of Ix81 specifies whether a Y-register is to be read, or an X-register.
A value of 0 in this bit, yielding Ix81 values from $08xxxx to $18xxxx, specifies a Y-
register; a value of 1, yielding Ix81 values from $48xxxx to $58xxxx, specifies an X-
register.
The following table shows Ix81 values for parallel data read through an ACC-14 board.
All ACC-14 registers are a Y-addresses.
Register Ix81 Register Ix81
1
st
ACC-14D/V Port A $xxFFD0 4
th
ACC-14D/V Port A $xxFFE8
1
st
ACC-14D/V Port B $xxFFD1 4
th
ACC-14D/V Port B $xxFFE9
2
nd
ACC-14D/V Port A $xxFFD8 5
th
ACC-14D/V Port A $xxFFF0
2
nd
ACC-14D/V Port B $xxFFD9 5
th
ACC-14D/V Port B $xxFFF1
3
rd
ACC-14D/V Port A $xxFFE0 6
th
ACC-14D/V Port A $xxFFF8
3
rd
ACC-14D/V Port B $xxFFE1 6
th
ACC-14D/V Port B $xxFFF9
xx’ represent the first two digits, which control bit width. They can take values
from $08 to $18.
For the ACC-8D Opt. 9 Yaskawa Absolute Encoder Converter, PMAC’s 24-bit encoder
phase position register, an X-register, is read, so Ix81 is set to $58xxxx ($180000 +
$400000).
The following table shows Ix81 values for a Yaskawa absolute encoder connected through
an ACC-8D Option 9 to each PMAC(1) encoder channel:
Channel Ix81 Channel Ix81
1 $58C001 9 $58C021
2 $58C005 10 $58C025
3 $58C009 11 $58C029
4 $58C00D 12 $58C02D
5 $58C011 13 $58C031
6 $58C015 14 $58C035
7 $58C019 15 $58C039
8 $58C01D 16 $58C03D
Channels 9 – 16 are on an ACC-24P/V board
The following table shows Ix81 values for a Yaskawa absolute encoder connected through
an ACC-8D Option 9 to each PMAC2 encoder channel:
Channel Ix81 Channel Ix81
1 $58C001 9 $58C041
2 $58C009 10 $58C049
3 $58C011 11 $58C051
4 $58C019 12 $58C059
5 $58C021 13 $58C061
6 $58C029 14 $58C069
7 $58C031 15 $58C071
8 $58C039 16 $58C079
Channels 9 – 16 are on an ACC-24P/V2 board
For the ACC-49 Sanyo Absolute Encoder Converter, the encoder provides a 13-bit value
within one motor revolution, and the data is read from a Y-register, so Ix81 is set to
$0Dxxxx.