Bay Technical Associates BayStack 400-ST1 - Manual (Page 9)

7
Base Unit Description
The base unit is a unique stack unit that can be selected by
the Unit Select switch on the front-panel of the 400-ST1
cascade module. One unit in the stack configuration must
be assigned as the base unit; all other units in the stack
must have their Unit Select switch set to Off (see
“Unit
Select Switch ” on page 5 ). Any single unit in the stack can
be assigned as the base unit.
The physical ordering of all of the other units in the stack
are determined by the position of the base unit within the
stack. This is important for management applications that
view the physical ordering of the units within the stack.
Some characteristics of the base unit are:
• Initial installation --- during the initial installation of
the stack, the software automatically determines the
physical order of all units in the stack according to the
position of the base unit within the stack.
For example, when the stack is powered up, the base
unit becomes unit 1 and the unit that the base unit
connects to (via the Cascade A Out cable) becomes
unit 2 (and the next unit is unit 3 and so on), until the
maximum stack configuration (up to 8 units) is
reached.
If the base unit is changed to another unit in the stack,
the new base unit keeps its original unit number in the
stack.