Omron CJ1W-DRM21 - Page 164

4 Remote I/O Master Communications
4-24
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
d) The start bit for node addresses can be bit 00 or bit 08. If it is bit 08 however, 2 or more
bytes cannot be allocated as shown below.
e) Multiple masters cannot share the same slave.
You can determine whether there are duplicate node addresses in the I/O allocations (scan
lists) that were created simply by conducting a master parameter file duplicate check from
the CX-Integrator.
f) Be sure to use user-set allocations and operate with the scan list enabled if multiple mas-
ters are connected to a single network. A Bus OFF errors will occur if multiple fixed alloca-
tions masters operating with the scan list disabled are present on a single network.
g) You can include multiple Master Units in a single CPU Unit as shown below using user-set
allocations (16 Units max.).
Step 3: Define User-defined Variable
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.
Example of User-set Allocations Using the CX-Integrator
Start byte
Master
Slave
Master
Master Unit
Slave
Master Unit
Slave
Slave types
16 output pts
Combination of 8 input
and output pts
Combination of 16 input
and output pts
8 input pts
32 output pts
Slave types
48 input pts
8 input pts
Combination of 8 output
and 16 input pts
Node
address
setting
Node
address
setting
Allocation status
Node
address
Output Input
Output Input
OUT area
OUT block 1
IN block 1
Allocation (00)
Allocation (01) Not used
Allocation (02)
Allocation (01) Allocation (03)
IN block 2
Allocation (02)
Allocation
Allocation
OUT block 2
Not used
Allocation
Allocation
Allocation
Not used
Allocation (12)
Not used
Allocation (09)
16 pts
8 pts
16 pts
0 pts
32 pts
0 pts
0 pts
8 pts
0 pts
8 pts
16 pts
8 pts
0 pts
8 pts
16 pts
48 pts
(10)
Allocation (12)
15
0051
00
CIO 1950
CIO 1951
CIO 1952
CIO 1953
CIO 1954
01000
IN area
(04)
15
0051
00
CIO 1900
CIO 1901
10 wd
11 wd
13 wd
12 wd
14 wd
15 wd
Node
address
00
01
02
03
10
09
12
04
00
01
02
03
10
09
12
04