NI 9144 User Guide and Specifications
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© National Instruments
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93
NI 9476 Error Status
If a channel over-current occurs on any of the 32 channels, the corresponding bit in error status
field is set to inform the user.
Errors are automatically internally acknowledged on the cycle after the error is reported.
NI 947
8
The vendor configuration extensions for the NI 9478 are listed in Table 109.
Current Limits and Selection
Each of the 15 channels has 2 bits represented in index 0x2001 “Current Limit Select”, with
channel 0 controlled by bits 0 and 1.
NI 947
8
Direction Control
Table 108.
NI 9476 Vendor Configuration Extensions
Index
Sub
Type
R/W
Description
0x2002
0
U32
R
Error Status, sent as 8-bit PDO
Table 109.
NI 947
8
Vendor Configuration Extensions
Index
Sub
Type
R/W
Description
0x2001
0
U32
R/W
Current Limit Select
0x2002
1
U32
R
Error Status A, sent as 16-bit PDO
2
U32
R
Error Status B, sent as 16-bit PDO
0x2003
1
U32
R
Error Overtemp, sent as 8-bit PDO
0x2004
1
U8
R/W
Limit A
2
U8
R/W
Limit B
0x2005
0
U8
R/W
Refresh Period
Table 110.
NI 947
8
Scan List Format
Bits
Field
31..30
0: Limit A
1: Limit B
2: No Limit
3: (no charge)
29..28
...
1..0
