Changing System Components - Omron CJ1W-DRM21 Operation Manual

4 Remote I/O Master Communications
Fixed Allocations Area 3
OUT blocks are allocated to slaves from CIO 3600 to CIO 3663 and IN blocks are allocated to slaves
from CIO 3700 to CIO 3763 in the memory used for CJ-series Unit. To access the output (OUT)
block and the input (IN) block from the user program, allocate a user-defined variable to the applica-
ble area.
CIO Area in the memory for CJ-series Units
Bit
CIO 3600
to
OUT block
CIO 3663
Bit
CIO 3700
IN block
to
CIO 3763
The Slave allocation order is fixed in the output (OUT) and IN blocks that start from address 0. Each
address is allocated at least one byte (rightmost).
• More than one word is allocated for each slave (according to it's 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.
4-3-3

Changing System Components

The scan list must be cleared in the following situations:
• Adding a slave
• Disconnecting a slave
• Changing a node address
Set the CPU Unit to PROGRAM Mode. Change *_Sw1SListClrCmd (Scan List Clear Switch) to TRUE
to clear the scan list. (Remote I/O communications will be performed with the scan list disabled using
fixed allocations in the fixed allocations area that was used the last time the list was disabled.)
Make sure that communications with all slaves are operating properly after the scan list is cleared and
the system component is changed, and then change *_Sw1SListEnblCmd (Scan List Enable Switch) to
TRUE again to register all slaves currently online in the scan list. Remote I/O communications will con-
tinue during this time with the scan list enabled.
4-18
OUT block
Bit
Address 0
CIO 3600
Address 1
CIO 3601
Address 2
CIO 3602
to to
Address 60
CIO 3660
Address 61
CIO 3661
Address 62
CIO 3662
Address 63
CIO 3663
IN block
Address 0
CIO 3700
Address 1
CIO 3701
Address 2
CIO 3702
to to
CIO 3760 Address 60
Address 61
CIO 3761
Address 62
CIO 3762
Address 63
CIO 3763
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
Output to Slaves
Input from Slaves