Grouping/Compatibility Appendix D
Series E4360 User’s Guide 111
Front Panel:
SCPI Command:
Select
System\Groups\Parallel.
Select either Direct or Auto.
To specify auto-parallel:
SYST:GRO:PAR AUTO,(@1)
To specify direct-parallel:
When grouped channels are wired by direct-parallel, each channel is
programmed to control its own output current with its internal circuitry.
There is no requirement to designate any master or follower channel.
Commands sent to the grouped channel will normally be applied to both
channels by the firmware automatically. Commands that control the
output current will be divided by ½ and applied to both channels.
NOTE
If you are grouping outputs, in direct parallel, in Fixed mode, you must
set the over-current protection of each output to its maximum setting.
Otherwise the over-current protection will shut the outputs down. This
occurs because output currents are not shared equally when outputs
are grouped in Fixed mode.
Step 3. Note that this step is not required with direct-paralleled outputs.
If the grouped outputs are connected in auto-parallel, specify which
mainframe has the master output, and which mainframe has the follower
outputs.
Front Panel:
SCPI Command:
Select
System\Groups\Programming.
Select Internal to specify the
mainframe with the master
output.
Select External to specify the
mainframe with follower
outputs.
To specify the mainframe that
contains with the master output:
CURR:MODE:PROG INT,(@1)
To specify the mainframe with the
follower outputs:
CURR:MODE:PROG EXT,(@1)To
NOTE
This command can only be programmed when the instrument is
operating in Fixed mode. An error will be generated if this command is
sent when the instrument is operating in SAS or in Table mode.
When grouped channels are auto-paralleled, the firmware will
automatically designate channel 1 as the master channel and channel 2
as a follower. The automatic designation is required since there is no
programming access to channel 2 once the channels are grouped.
When channels on two mainframes are grouped and auto-paralleled,
one channel on one of the mainframes must be programmed as a master
with the above commands while all other channels must be programmed
as followers.
To program the output current of the auto-paralleled grouped channels,
the master group must be programmed with 1/nth of the desired
current, where n is the number of groups paralleled. The follower groups
will generate the same current as signaled by the master group.
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