NI 9144 User Guide and Specifications
36
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NI 9217 Conversion Speed Control
The NI 9217 converts at two pre-defined rates, as controlled by the speed
control field.
Note
The conversion rate assumes that 4 channels are in the scan list.
NI 9217 Scan List
The scan list channel codes consist of three bit fields in a 32-bit entry.
Bits 15..8 describe the data offset to store a conversion at time
t
, and
bits 7..0 describe the conversion control codes that take effect
0x2100
0
ARR:U32
—
Calibration = 16
1
R
Ch0 Offset
2
R
Ch0 Gain
3
R
Ch1 Offset
...
...
...
8
R
Ch3 Gain
9
R
External Ch0 Offset
...
...
...
Table 27.
NI 9217 Conversion Speed Control
Speed Control
Meaning
Conversion Rate
31 (0x1F)
High-Accuracy
200 ms/channel (800 ms total)
2 (0x02)
High-Speed
2.5 ms/channel (10 ms total)
Table 28.
NI 9217 Scan List Format
Bits
Field
31:16
Reserved
15:8
Data Offest[
t
]
7:0
Convert Code[
t
+1]
Table 26.
NI 9217 Vendor Configuration Extensions (Continued)
Index
Sub
Type
R/W
Description
