National Instruments GPIB-VXI/C, Руководство пользователя

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Chapter 2 Configuration and Startup Procedures
© National Instruments Corporation 2-11 GPIB-VXI/C User Manual
Figure 2-6. Discrete Fault Indicator Configuration
Address Modifier Configuration
By setting onboard switches, you can have the GPIB-VXI/C specify the
state of the VXIbus Address Modifiers during a VXI master access. During
A16 accesses, the lines AM5, AM4, and AM3 are needed high, low, and
high, respectively, and AM1 is needed low. During A24 accesses, the lines
AM5, AM4, and AM3 are all needed high. The GPIB-VXI/C drives the
upper three address modifier lines appropriately for every access. You
should configure the GPIB-VXI/C to drive the lower three address modifier
lines as needed.
Table 2-6. Discrete Fault Indicator Options
Switch S17 Power SYSFAIL Pins 1 and 6
OFF
Figure 2-6a OFF
ON
ON
N/A
Asserted
Unasserted Short-Circuit
Short-Circuit
Open-Circuit
ON
Figure 2-6b OFF
ON
ON
N/A
Asserted
Unasserted Open-Circuit
Open-Circuit
Short-Circuit
S17 S17
a. DFI in Normally Open Mode
(Factory Configuration)
b. DFI in Normally Closed Mode