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8 I/O Allocations and Unit Settings
CJ2 CPU Unit Software User’s Manual
8-1 I/O Allocations
8
8-1-3 Manual Allocation
Note Rack numbers (0 to 3) 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 3. These numbers cannot be
changed.
Setting First Rack Words from the CX-Programmer
Use the following procedure to set the first rack words.
1 Select the Rack/Slot Start Addresses from the Option Menu on the I/O Table Window. The fol-
lowing dialog box will be displayed.
2 Select the Rack Start Addresses Settings Option and click the OK Button.
3 In the dialog box that will appear, remove the check marks from the settings disabling the first
rack word settings and set the address of the first words for the CPU Rack and Expansion Racks
(1 to 7).
Note 1 Up to 3 Racks can be set for any CPU Unit model.
2 Although the CX-Programmer window will display 7 Racks, only 3 Racks can be set for the CJ2 CPU Unit.
Rack First Word Settings
Rack First word
CPU Rack CIO 0100
Rack 1 CIO 0120
Rack 2 0000
Rack 3 0140
Setting Setting range Default Remarks
Rack Start Address 0 to 900 0 Same for all Racks
Invalid Selected or cleared Selected (invalid)
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