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5.9.5
Advanced Parallel operation
Advanced parallel operation is identical to the single power supply operation. Power supplies
connected in advanced parallel connection form a system. The system is controlled and monitored
by the master unit. Slave units do not receive commands, communications. Front panel buttons
and encoders are disabled. Voltage/Current/Power programming and read-back through
communications and front panel are the parameters of the system (the current and the power
parameters programmed and monitored from the master unit are the total current and power of the
system).
Constant Power Limit minimum limit setting is dependent on the number of units connected in
parallel. Single unit minimum value is 1W. Connecting additional units in parallel results in 1W
multiplied by n, while n is the number of units connected in parallel (including the master unit).
5.9.6
Slave units operation in Advanced Parallel connection
Slave units are automatically configured as slaves, according to advanced parallel bus paralleling
cable connection (G/P). Slave units show on the display the output state of the system "SLAVE
ON" or "SLAVE OFF", or faults in case a fault has occurred. Each slave unit displays only its own
faults. Slave units allow only query communication commands.
5.9.7
Advanced Parallel fault system
Advanced parallel fault system combines the faults of the master and slave units. The master unit
shows on the display and communications both its own faults and the slave units' faults. Each
slave unit shows on the display its own faults only. Slave units show OUT OFF in case of a fault in
any of the other units. In case of a fault in any of the slave units, the system acts as if the fault has
occurred in the master unit.
5.9.8
Advanced Parallel Errors
Advanced Parallel system automatically turns output off (output of all the units) in case of an error
related to parallel connection. Refer to Table 5-2: Advanced Parallel Errors and Display
Notifications for the detected errors and display notifications.
Advanced Parallel System Error Description
Slave unit communication error during operation
Last Slave unit is missing or not connected
Advanced Parallel system is waiting for slave unit to become ready (@start-up)
Unrecoverable Advanced Parallel system error
Paralleled units are not identical (non-matching Voltage and/or Current rating)
Advanced Parallel system error status can be detected by the questionable group registers. Refer
to Section 6.3.2 Questionable Group (Fault Register) Structure.
Table 5-2: Advanced Parallel Errors and Display Notifications
NOTE
147
Display Notification
A.PRLL ERR1
WAIT SLAVE
WAIT SLAVE
GNRL ERROR
A.PRLL ERR3
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