Omron CJ1W-DRM21 - Page 143

4-3
4 Remote I/O Master Communications
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
4-1 Master Remote I/O Communications
4
4-1-1 Allocations
You can use *_Sw1MstrFixAloc1Cmd to *_Sw1MstrFixAloc3Cmd (Master Fixed Allocation Setting 1 to
3 Switch) to specify where a slave is allocated in the following fixed allocation areas 1 to 3. The output
(OUT) block and the input (IN) block are allocated to a certain area as shown below in the order of node
address.
To access the allocated area from the user program, a user-defined variable that specifies the AT spec-
ification of that area needs to be defined.
Words are allocated to slaves that start from address 0 in the output (OUT) and input (IN) blocks. Each
address is allocated at least one byte (rightmost).
• More than one word is allocated for each slave (according to its node address) with more than16
I/O points.
• The rightmost byte of the word is allocated to each slave that has 8 I/O points or less.
The following methods are used for user-set allocations:
• Using the CX-Integrator
• Using the device variable for CJ-series Unit (Master User-set Allocations Setup Table)
Fixed Allocations
User-set Allocations
Memory used for CJ-series Unit
NJ Series
User program
CIO 3200
CIO 3263
CIO 3200
CIO 3201
:
CIO 3262
CIO 3263
CIO 3300
CIO 3363
Address 0
Address 1
:
Address 62
Address 63
CIO 3300
CIO 3301
:
CIO 3362
CIO 3363
Address 0
Address 1
:
Address 62
Address 63
To SlavesFrom Slaves
CIO 3400
CIO 3463
CIO 3400
CIO 3401
:
CIO 3462
CIO 3463
CIO 3500
CIO 3563
Address 0
Address 1
:
Address 62
Address 63
CIO 3500
CIO 3501
:
CIO 3562
CIO 3563
Address 0
Address 1
:
Address 62
Address 63
To SlavesFrom Slaves
CIO 3600
CIO 3663
CIO 3600
CIO 3601
:
CIO 3662
CIO 3663
CIO 3700
CIO 3763
Address 0
Address 1
:
Address 62
Address 63
CIO 3700
CIO 3701
:
CIO 3762
CIO 3763
Address 0
Address 1
:
Address 62
Address 63
To SlavesFrom Slaves
Output
(OUT)
block 1
Input
(IN)
block 1
User-defined
variable
User-defined
variable
User-defined
variable
Specify using master fixed
allocation setting switches 1-3.
Input
(IN)
block 2
Input
(IN)
block 3
Output
(OUT)
block 2
Output
(OUT)
block 3
Master Fixed Allocation
Setting 1 Switch
Master Fixed Allocation
Setting 2 Switch
Master Fixed Allocation
Setting 3 Switch