Chapter 3
Local Command Set
©
National Instruments Corporation
3-27
Dynamic Reconfiguration Queries
These dynamic reconfiguration queries are described in the following sections:
•
Broadcast?
•
GrantDev?
•
RelSrvnt?
The dynamic reconfiguration commands are used to reconfigure the GPIB-VXI/C’s Servant
subtree after the system has entered the Normal Operation substate. If the GPIB-VXI/C is
RM, these commands can be used to reconfigure the entire system.
The
Broadcast?
query can be used to make the system or subtree enter the Configure
substate by broadcasting the
End Normal Operation
Word Serial query, or the
Clear
Word
Serial command followed by the
Abort Normal Operation
Word Serial query.
The
RelSrvnt?
and
GrantDev?
queries can then be used to restructure the
Commander/Servant hierarchy. You could perform dynamic reconfiguration directly by using
the
WSCmd
and
WSCmd?
local commands, but the GPIB-VXI/C’s RM table would not be
updated. By using the
RelSrvnt?
and
GrantDev?
queries to reconfigure the system,
you ensure that the GPIB-VXI/C’s system hierarchy and GPIB address link records do not
become corrupted.
You can return the system or subtree to the Normal Operation substate by using the
Broadcast?
query to broadcast the
Identify Commander
and
Begin Normal Operation
Word Serial commands.