4 Remote I/O Master Communications
4-22
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
You can allocate slaves in any order for the following blocks: OUT block 1, OUT block 2, IN block 1,
and IN block 2.
To access the area where the slave is allocated from the user program, a user-defined variable that
specifies the AT specification of that area needs to be defined.
You can set the block allocation order, block allocation areas, and order of node addresses in each
block. Each address is allocated at least one byte (rightmost or leftmost byte).
• More than one word is allocated for each slave (according to it's node address) with more
than 16 I/O points.
• The leftmost or rightmost byte of the word is allocated to each slave that has 8 I/O points or
less.
4-4-1 Settings through CX-Integrator
Specified areas in memory used
for CJ-series Unit
User-set block order
Specified areas in I/O memory
Bit
First word specified
OUT block 1
Bit
First word specified
IN block 1
OUT block 1
User-set block order
Bit
First word
specified
Output to slaves
IN block 1
User-set block order
Bit
First word specified
Input from slaves
Bit
First word specified
OUT block 2
Bit
First word specified
IN block 2
OUT block 2
Bit
First word
specified
Address
Address
IN block 2
Bit
First word specified
Address
Address
Address
Address
Address
User-set block order
Output to slaves
User-set block order
Input from slaves
Address
Address
Address
Address
Address
Address
Address
Address
Address
Address
Address
Address
Address
Address
Address
Address
Address
Address
Address
Address
Address
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