Omron CJ1W-DRM21 Operation Manual page 144

4 Remote I/O Master Communications
With CX-Integrator
When using the CX-Integrator, you can allocate four blocks to each slave: Output (OUT) blocks 1
and 2 and input blocks 1 and 2. Each block is a maximum of 500 words. To access the allocated
area from the user program, a user-defined variable that specifies the AT specification of that area
needs to be defined.
User program
User-defined
variable
User-defined
variable
You can use any order for block allocations and for slave allocations within each block. Each address
is allocated at least one byte (rightmost).
• More than one word is allocated for each slave with more than16 I/O points (using it's node
address).
• The leftmost or rightmost byte of the word is allocated to each slave that has 8 I/O points or
less.
Using "*_MstrAlocTblCfg[0 to 5]" (Master User-set Allocations Setup Table)
In *_MstrAlocTblCfg[0 to 5] (Master User-set Allocations Setup Table), set the areas and first words
for the output block (OUT 1) and the input block (IN 1) and set the area and first word for the Alloca-
tion Size Setup Table. You can allocate each slave two blocks, OUT 1 and IN 1, according to the set-
tings in this device variable for CJ-series Unit. The OUT and IN blocks will be allocated in order of
slave node addresses. Each block is a maximum of 500 words.
To access the allocated area from the user program, a user-defined variable that specifies the AT
specification of that area needs to be defined.
User program
Device variables for CJ-series Unit
User-defined variable
User-defined variable
Specify the area, first word, and allocation
size to allocate output/input block 1.
Each address is allocated at least one byte (rightmost).
• More than one word is allocated for each slave with more than16 I/O points (according to its
node address).
• The rightmost byte of the word is allocated to each slave that has 8 I/O points or less.
4-4
CPU Unit
CJ-Series Unit memory
Output area
OUT
block 1
OUT
block 2
Input area
IN
block 1
IN
block 2
CPU Unit
CJ Unit memory
Ascending order that start from address 0
Address
OUT
block 1
Address
Ascending order that start from address 0
Address
IN
block 1
Address
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
You can set the position of each block.
An order (such as IN block 1, OUT block 2,
IN block 2 and OUT block 1) can also be used.
Address Any address order
Address
Address Any address order
Address
Address Any address order
Address
Address Any address order
Address