Appendices
A-86
NJ-series CPU Unit Software User’s Manual (W501)
For details on how to use the allocated words, refer to the operation manual for the CJ-series CPU
Bus Unit.
Precautions for Correct UsePrecautions for Correct Use
You can access the CPU Bus Unit Area in NJ-series CPU Units through the device variables that
are allocated to I/O ports. We therefore recommend that you do not use AT specifications to
access this area. You should use AT specifications for the CIO Area only when you specify
addresses for some of the Special Units.
Description
The bits in this area are allocated to control and status information for CJ-series Special I/O Units.
Each Unit is allocated 10 words based on the unit number for up to a total of 96 Units (unit numbers
0 to 95). Data in this area is cleared when power is cycled or when the operating mode is changed
between PROGRAM and RUN mode.
Addresses
The words that are allocated are listed in the following table.
For details on how to use the allocated words, refer to the operation manual for the CJ-series Spe-
cial I/O Unit.
You can access the Special I/O Unit Area in NJ-series CPU Units through the device variables
that are allocated to I/O ports. We therefore recommend that you do not use AT specifications to
access this area.
Description
The bits in this area are allocated to the slaves when the remote I/O master function of a DeviceNet
Unit is used (fixed allocations only). Data in this area is cleared when power is cycled or when the
operating mode is changed between PROGRAM and RUN mode.
Special I/O Unit Area
Addresses Word addresses Bit addresses Words per Unit
Range
CIO 2000 to CIO 2959
(10 words 96 unit
numbers)
CIO 2000.00 to CIO 2959.15 10 words
Word addresses Unit Number
CIO 2000 to CIO 2009 0
CIO 2010 to CIO 2019 1
to to
CIO 2950 to CIO 2959 95
DeviceNet Area
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