10-89
10 CPU Unit Functions
CJ2 CPU Unit Software User’s Manual
10-8 Synchronous Unit
Operation
10
10-8-4 Synchronous Data Refresh
Addresses in the Synchronous Data Refresh Area are from CIO 1200 to CIO 1295. The first word in this
area is always CIO 1200. Other addresses can be set.
z Allocation Example
Input Data and Output Data Word Allocation Example for Synchronous Data
The start addresses and data sizes are set for synchronous data refreshing. (This example uses unit
numbers 0 and 1.)
Setting Example for I/O Data for Synchronous Data Refresh Using Position Control Units
The application of the allocated I/O data must be set.
• Output Data
For a Position Control Unit, the word that is used for position data for a synchronous feed com-
mand is set for each axis.
• Input Data
For a Position Control Unit, the present command value or present feedback position for each axis
is set.
I/O Item Description
Output data Direction CPU Unit to Synchronous Units
Starting word CIO 1200 (fixed)
Allocation The sizes of data specified in the PLC Setup are allocated to the CPU Unit
and then to the Synchronous Units in the order the Synchronous Units are
registered. Two or more words can be allocated to the CPU Unit and zero or
more words can be allocated to each Synchronous Unit.
Input data Direction Synchronous Units to CPU Unit
Starting word The address of the starting word is set in the PLC Setup. It can be between
CIO 1202 and CIO 1294.
Allocation The sizes of data specified in the PLC Setup are allocated to the Synchro-
nous Units in the order the Synchronous Units are registered. Zero to 16
words can be allocated to each Synchronous Unit.
Address Item I/O
CIO 1200 Words allocated to the CPU Unit (for a data
size setting of 2 words)
Outputs from CPU Unit to Synchronous Units
CIO 1201
CIO 1202 Words allocated to Synchronous Unit 0 (for a
data size setting of 2 words)
CIO 1203
CIO 1204 Words allocated to Synchronous Unit 1 (for a
data size setting of 4 words)
CIO 1205
CIO 1206
CIO 1207
::
CIO 1250 Words allocated to Synchronous Unit 0 (for a
data size setting of 4 words)
Inputs from Synchronous Units to CPU Unit
CIO 1251
CIO 1252
CIO 1253
CIO 1254 Words allocated to Synchronous Unit 1 (for a
data size setting of 2 words)
CIO 1255
::
CIO 1295 ...
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