Omron CS1D DUPLEX SYSTEM - 10-2009 Operation Manual page 271

Cs1d duplex system

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Allocating First Words to Racks

Word Allocations

Rack number 0

Rack number 1

Rack number 2

Rack number 3

For Racks in which the first word address has been set, words are allocated to

Units in the order that the Units are mounted (from left to right) beginning with

the specified first word. Words are not allocated to empty slots.

For Racks in which the first word address has not been set, words are allo-

cated in rack-number order (lowest to highest) continuing from the last word

allocated to the previous rack and starting with CIO 0000 on the first Rack for

which the first word is not set.

Example: Setting the First Words for Racks

In this example, the first words have been set for Racks 0 (the CPU Rack), 2,

and 3. For simplicity, only 16-bit Units have been used.

First word: CIO 0100

First word: CIO 0200

No first word setting (Words automatically allocated in order from CIO 0000.)

First word: CIO 0300

Rack First Word Settings

Note Rack numbers (0 to 7) are fixed according to the order that the Racks are

physically connected with cable. The CPU Rack is always Rack 0 and the

other Racks are, in order, Racks 1 to 7. These numbers cannot be changed.

In the above example, the shaded Racks are allocated words starting from the

CS1D Expansion Rack

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