National Instruments SCXI-1120 - Manual (Page 85)

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.