Quantifi Photonics 1000 Series, User Manual, Page: 45 / 59

Automated Optical Switch | Switch 1000/1100/1400 Series
Quantifi Photonics Ltd. Version 3.04 45
Switch PXIe Multi Chassis mode operation
Multiple chassis can be connected to operate in Multi Chassis Mode. To operate in Multi Chassis Mode,
CohesionSCPI service must be version 1.02.06 or later.
9.6.1 NI-MAX application Multi Chassis mode
In the example shown below, there are two chassis connected via the PXIe-8384 to PXIe-8381
connection. Chassis #2 has the controller running CohesionSCPI service, and Chassis #3 is the
‘extended’ chassis .
9.6.2 SCPI Multi Chassis commands
Command :SYSTEM:CHASSIS?
Syntax
:SYSTEM:CHASSIS?<wsp>[LIST|MODE]
Description Query the Chassis Mode configuration
Parameters No parameters
Response
LIST
: Returns a comma separated list of valid chassis index numbers discovered by
the CohesionSCPI service. These are chassis that have modules installed
MODE
: Returns the current Chassis Mode the CohesionSCPI service is operating in
(
SINGLE
or
MULTI
)
None
: Returns the number of chassis managed by the CohesionSCPI service. If
operating in SINGLE mode, this will always return
1
Example
In Single chassis mode:
:SYSTEM:CHASSIS? -> 1
:SYSTEM:CHASSIS? LIST -> 0
:SYSTEM:CHASSIS? MODE -> SINGLE
In Multi chassis mode:
:SYSTEM:CHASSIS? -> 2
:SYSTEM:CHASSIS? LIST -> 2,3
:SYSTEM:CHASSIS? MODE -> MULTI
The CohesionSCPI service does not manage the chassis numbers. These are controlled by the
NI Platform Services (and through NI-MAX).
Even if the CohesionSCPI service is in Multi Chassis mode, if a chassis is connected but has no
installed modules, it will not show up when
*OPT?
is run.