NI 9144 User Guide and Specifications
22
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NI 9201/9221 Scan List
The scan list channel codes consist of two bit fields in a 32-bit entry.
Bits 23..16 describe the data offset to store a conversion at time
t
, and
bits 7..0 describe the conversion control code that takes effect
two conversions in the future
,
at time t+2
. On the NI 9201/9221, this
conversion code is a bit flag where bit 0 represents a conversion on channel
0, through bit 7 for channel 7.
So, for example, the scan list entry
0x00010008
indicates this scan stores
at address 1, and the conversion two in the future is channel 3 (bit 3 set = 8).
Table 6 contains the default scan list.
Table 5.
NI 9201/9221 Scan List Format
Bits
Field
31:24
= 0
23:16
Data Offset[
t
]
15:8
= 0
7:0
Convert Flag[
t
+2]
Table 6.
NI 9201/9221 Default Scan List
Index
Sub
Type
Value
0x2001
0
ARR:U32
9
1
8
2
0x00000004
3
0x00010008
4
0x00020010
5
0x00030020
6
0x00040040
7
0x00050080
8
0x00060001
9
0x00070002
