Current Sharing (6000 Watt only)
Operation
176 Operating Manual for XDC Series Power Supply
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 may use local or remote (RS-232, GPIB, multichannel or analog) 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 or the OUT ON/OFF key on the
front panel.
The default display will show a greek letter sigma before the readback current if the
summed current output is being displayed. E.g. The display may read "60.00V Σ
500A". However, the setpoint displayed on the master is still the current limit for a
single unit.
The master or slave annunciators will light up to show that current share is operating
properly.
Power supplies may not enter calibration mode while current sharing, or enter
current share operation while in calibration mode.
Errors The slave annunciator will flash 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.
See “Current Share Error Codes” on page 222 for the list of error codes and
messages.