4 Remote I/O Master Communications
4-14
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
4-3
Fixed Allocations
If fixed allocation is used, allocated words are in the following I/O (CIO) area in the memory used for CJ-
series Unit. You can select an area of words from one of three fixed allocation areas. Use
*_Sw1MstrFixAloc1Cmd
to
*_Sw1MstrFixAloc3Cmd
(Master Fixed Allocation Setting 1 to 3 Switch) to
select the allocation area.
Each area is comprised of an OUT area that is used to write output data to slaves and an IN area that is
used for input from slaves in remote I/O communications.
To access a slave allocated to the fixed allocations areas 1 to 3 from the user program, user-defined
variables that specify the AT specification of the memory used for CJ-series Unit to which the slave is
allocated need to be defined.
You can include a maximum of 3 DeviceNet Units as masters in a single CPU Unit because the three
allocation areas above on the memory used for CJ-series Unit are set individually for fixed allocations.
The default setting is fixed allocations area 1.
Each OUT/IN area is allocated to a slave according to its node address as shown below. Allocated
words are determined by the node address in fixed allocations as shown.
Note
You can include more than one Master Unit in a single CPU Unit with fixed allocations, as shown
below (3 Units max.).
4-3-1
Allocated Words
Area
OUT area (word)
IN area (word)
Selection method
Fixed allocation area 1
CIO 3200 to CIO 3263
CIO 3300 to CIO 3363
Change
*_Sw1MstrFixAloc1Cmd
(Master
Fixed Allocation Setting 1 Switch) to TRUE.
Fixed allocation area 2
CIO 3400 to CIO 3463
CIO 3500 to CIO 3563
Change
*_Sw1MstrFixAloc2Cmd
(Master
Fixed Allocation Setting 2 Switch) to TRUE.
Fixed allocation area 3
CIO 3600 to CIO 3663
CIO 3700 to CIO 3763
Change
*_Sw1MstrFixAloc2Cmd
(Master
Fixed Allocation Setting 3 Switch) to TRUE.
Area 3
Area 2
Area 1
OUT area
Node
address
IN area
Area 1
Area 2
Area 3
0
0
7
3
O
I
C
0
0
5
3
O
I
C
0
0
3
3
O
I
C
0
0
2
3
O
I
C
0
0
4
3
O
I
C
0
0
6
3
O
I
C
1
0
7
3
O
I
C
1
0
5
3
O
I
C
1
0
3
3
O
I
C
1
0
2
3
O
I
C
1
0
4
3
O
I
C
1
0
6
3
O
I
C
2
0
7
3
O
I
C
2
0
5
3
O
I
C
2
0
3
3
O
I
C
2
0
2
3
O
I
C
2
0
4
3
O
I
C
2
0
6
3
O
I
C
1
6
7
3
O
I
C
1
6
5
3
O
I
C
1
6
3
3
O
I
C
1
6
2
3
O
I
C
1
6
4
3
O
I
C
1
6
6
3
O
I
C
2
6
7
3
O
I
C
2
6
5
3
O
I
C
2
6
3
3
O
I
C
2
6
2
3
O
I
C
2
6
4
3
O
I
C
2
6
6
3
O
I
C
3
6
7
3
O
I
C
3
6
5
3
O
I
C
3
6
3
3
O
I
C
3
6
2
3
O
I
C
3
6
4
3
O
I
C
3
6
6
3
O
I
C
Master Unit
Master Unit
Slave
Slave
Summary of Contents for CJ1W-DRM21
Page 12: ...Manual Structure 10 CJ series DeviceNet Units Operation Manual for NJ series CPU Unit W497 ...
Page 42: ...Revision History 40 CJ series DeviceNet Units Operation Manual for NJ series CPU Unit W497 ...
Page 345: ...Index 1 CJ series DeviceNet Units Operation Manual for NJ series CPU Unit W497 I Index ...
Page 349: ......
