output Off Couple digital port signals to provide synchronized instrument turn-on and turn-off
capability. You must explicitly enable the current sharing function on each paralleled unit.
Master/Slave Operation
Up to twenty paralleled instruments can be connected in a master/slave configuration. All units must
have the same voltage rating but current ratings can be different. All units must have the same version
firmware installed. Refer to Instrument Identification to view the firmware version. The configuration
procedure for master/slave operation is as follows:
l Configure one unit as the master
l Configure the other units as slaves with unique bus addresses
l Select the connection mode and auto-connect delay time
l Perform a one-time discovery on the master - it saves the master/slave configuration
l At power-on, the master connects automatically or manually
l If the master/slave configuration is subsequently changed, it needs to be re-discovered
Master/Slave Configuration
Configure each paralleled instrument as either a Master or Slave.
Front Panel Menu Reference SCPI Command
Select System\Group\Function
In the dialog box, select either Master, Slave, or None.
Then press Select.
To configure the paralleled unit:
INST:GRO:FUNC MAST|SLAV|NON
If the unit is the master, a delay may be programmed to allow the slave units enough time to boot up
before the master auto-connects to the slave. If there is a delay in powering up the slave units, the
master auto-connect may fail.
Front Panel Menu Reference SCPI Command
Select System\Group\Delay
In the dialog box, set the auto-connect delay.
Then press Select.
To set the auto-connect delay to 10:
INST:GRO:MAST:DEL 10
If the unit is a slave, each slave unit must be assigned a unique bus address (from 1 - 19).
Front Panel Menu Reference SCPI Command
Select System\Group\Slave
In the dialog box, select the address of the slave unit.
Values can range from 1 - 14. Then press Select.
To set the slave address to 1:
INST:GRO:SLAV:ADDR 1
Specify the master unit's connection mode.
Keysight RP7900 Series Operating and Service Guide 111
4 Using the Regenerative Power System
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