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Current Sharing
Operation
Release 2.1 91
Operation
Once a current sharing network is setup, you may adjust the voltage setpoint on the
master. The master will automatically adjust the setpoints of the slave units to
equalize the current output of all units. You may also disable or enable the output of
the master, automatically disabling or enabling the output of all slaves.
You must use GPIB control to operate the master.
Slaves will be operating under remote control from the master and in local lockout.
Hence, they will only respond to remote queries. XFR or XHR power supplies will
still respond to the STANDBY key on the front panel.
Power supplies may not enter calibration mode while current sharing, or enter
current share operation while in calibration mode.
Errors The slave will queue and error if it does not detect a master on the network. Check
the cable and the master configuration.
A master or slave will be disabled from current sharing (set to "No share") if:
• there is more than one master connected to the CANbus, (Error +1811)
• there are more than 4 slaves, (Error +1822), or
• the model does not match that of the master, (Error +1822).
In each of these cases, the current share mode will be set to “No share”.
If a unit becomes disconnected due to a failure in communications, the master will
queue error +1812, "Current Share Slave Lost" and the slave will queue error +1821,
"Current Share Master Lost." The slave's output will be disabled, and the slave
annunciator will flash.