3.3 Multi-CPU Functions
Sub CPU Synchronization
3-106
CPU Interface Registers for Low-speed Scan
You can set register sizes of up to 2,048 words for both the input and output registers for the CPU interface
registers for the low-speed scan. Set a value that is an integral multiple of 16 words (32 bits).
The data transfer size is the smaller of the I/O sizes of the Main CPU Unit and Sub CPU Unit. We recom-
mend that you set the same I/O sizes for the Main CPU Unit and Sub CPU Units to make programming
easier to understand.
Data transferred.
OW
IW
Main CPU Unit
Sub CPU Unit
Data transferred.
IWooooo
OW
Output size:
Set to between 0
and 2,048 words.
Input size:
Set to between 0
and 2,048 words.
Input size: Set to
between 0 and
2,048 words.
Output size: Set
to between 0 and
2,048 words.
If different I/O sizes are
set for the Main CPU
Unit and Sub CPU Unit,
the data in this area is
not transferred.
If different I/O sizes are
set for the Main CPU
Unit and Sub CPU Unit,
the data in this area is
not transferred.
