Chapter 2
Configuration and Startup Procedures
2-24
ni.com
Slot 0 Message-Based Device Operation
At startup, a GPIB-VXI/C configured as a Slot 0 Message-Based device
performs its self-tests. It then waits until it receives its
Device Grant
(if any) and
Begin Normal Operation
Word Serial commands. The RM
grants any logical addresses to the GPIB-VXI/C that reside within its
Servant area. When the GPIB-VXI/C responds to the
Begin Normal
Operation
command, it enters the normal mode of operation.
After the GPIB-VXI/C Passed bit is set, the RM can manipulate or read the
MODID lines by sending the Word Serial queries
Read MODID
,
Set Lower
MODID
, or
Set Upper MODID
to the GPIB-VXI/C.
Switch S23
ON
Bus arbiter and SYSCLK enabled. CLK10
sourcing backplane.
Switch S24
ON
MODID pulled up.
Logical Address
Refer to Chapter 4,
Logical address is not equal to 0. Set in
nonvolatile configuration or by using DIP
switch SW1.
Slot 0 Model
Code
Refer to Chapter 4,
Model code is set to the Slot 0 value. Set in
nonvolatile configuration.
Servant Area
Size
Refer to Chapter 4,
Set appropriate Servant area size. Set in
nonvolatile configuration.
Table 2-15.
CLK10 Routing Options
Switch S9
Switch S15
Function
OFF
OFF
CLK10 sourced from onboard clock.
OFF
ON
CLK10 and EXT CLK connector
sourced from onboard clock.
ON
OFF
CLK10 sourced from an external clock
via the EXT CLK connector.
ON
ON
Invalid. Do not use this setting.
Table 2-14.
Slot 0 Message-Based Device Operation Switch and Jumper Settings (Continued)
Jumper/Switch
Position
Function
