Programming
Chapter 5
SCXI-1120 User Manual
5-14
© National Instruments Corporation
7. Follow the procedure given in the 4. Acquisition Enable, Triggering, and Servicing section
earlier in this chapter.
Example 3
You want to scan five channels on an SCXI-1120 in Slot 4 of Chassis 1, then seven channels of
an SCXI-1120 in Slot 11 of Chassis 2, three channels of an SCXI-1120 in Slot 3 in Chassis 3,
and one channel of an SCXI-1120 in Slot 8 of Chassis 3.
Assuming that the modules are correctly cabled and programmed, the Slot 0 scan lists should be
as follows:
Chassis 1
Chassis 2
Chassis 3
Entry
Slot
Number
Count
Entry
Slot
Number
Count
Entry
Slot
Number
Count
1
4
5
1
13
5
1
13
12
2
13
11
2
11
7
2
3
3
3
13
4
3
8
1
Other solutions are possible.
In the section earlier in this chapter, 3. Programming the Slot 0 Hardscan Circuitry, step 3, Write
the Slot 0 scan list to the FIFO, consists of the following steps:
1.
Select Slot 14 in Chassis 1.
2.
Write
XXXXX001 10000100
over MOSI.
3.
Toggle SLOT0SEL*.
4.
Write
XXXXX110 00001010
over MOSI.
5.
Select Slot 14 in Chassis 2.
6.
Write
XXXXX110 00000100
over MOSI.
7.
Toggle SLOT0SEL*.
8.
Write
XXXXX101 00000110
over MOSI.
9.
Toggle SLOT0SEL*.
10.
Write
XXXXX110 00000011
over MOSI.
11.
Select Slot 14 in Chassis 3.
12.
Write
XXXXX110 00001011
over MOSI.
