Reference Manual

PMAC 2 Software Reference
162 PMAC I-Variable Specifiation
I1017 SSI Channel 1 Word Length Control {Geo PMAC only}
Range
0 – 3
Units
none
Default
3
Remarks
I1017 specifies the word length in bits from the first SSI-encoder interface on a Geo
PMAC. The following table lists the possible values of I1017 and the word lengths they
cause the Geo PMAC to request:
I1017 Word Length
0 12 bits
1 16 bits
2 20 bits
3 24 bits
I1017 is only used if the Geo PMAC’s Feedback Option 2 for absolute position feedback is
ordered.
I1018 SSI Channel 2 Mode Control {Geo PMAC only}
Range
0 – 3
Units
None
Default
3
Remarks
I1018 specifies the mode for interpreting data from the second SSI-encoder interface on a
Geo PMAC. The following table lists the possible values of I1018 and the data formats
they cause the Geo PMAC to expect:
I1018 SSI Clock Freq.
0 (Reserved)
1 (Reserved)
2 Numeric binary
3 Gray code
I1018 is only used if the Geo PMAC’s Feedback Option 2 for absolute position feedback is
ordered.