Important Note: Some power supply control boards, such as the CPSMP110, are intended to be generic. This means that this model theoretically supports a very wide range of features, but in reality not all features are present in all configurations.
At the time of this writing, there was no such thing as a power supply that supports master(1)/slave(2) modes and shared(3) mode. Any attempt to switch any current controller out of shared(3) mode will result in a "badValue" error.
Some power supplies support a Master/Slave relationship:
When one power supply is set to master(1) and the
other is set to slave(2), the master will supply
all power to the cabinet, and the slave will take
over if the master stops supplying power. This is
useful when (for example) one supply is attached to a
wall socket and the other to a battery backup. The
cabinet can be directed to only draw power from
batteries when there is no alternative.
When both power supplies are set to master(1), the
results are determined automatically.
WARNING: On models where master/slave functionality
is supported, it is up to the system administrator to
ensure that at least one power supply is set to
master(1). It is illegal to set all power supplies to
slave(2). If this occurs, the cabinet may lose
all power under certain circumstances, even if
power is available.
On some future models, the Master/Slave relationship will
not be configurable via management; instead it will be
determined by other means, such as the slot locations in which the
supplies are installed, or switches on the supplies.
In this case, attempts to change the value of this
variable from management will be ignored. The
ConfigMode variable will have the value hardware(2)
in this case, unless there are other configurable
parameters for the power supply.
If a supply does not support Master/Slave
functionality, the read-only value shared(3) is returned.
In this case, all ready power supplies share the load evenly.