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4-1
Section
Overall Structure
56
4-1
Overall Structure
The PCU is used by exchanging data with the CPU Unit as shown below.
CPU Unit
PCU
CIO Area
Special I/O Unit Area
Operating memory area
(output)
(input)
DM or EM Area
User-specified DM or EM words
(specified in common parameters)
DM Area words allocated
to Special I/O Units
Operating data area
(output)
(input)
Common parameter area
Axis parameter area
User-specified DM or EM words
(for data transfer)
Data transfer area
CX-Position
I/O refresh
Power up
or restart
(See note 1.)
Data transfer
Operating commands
Commands
Settings
Operating data
Command
execution
Status (flags)
Operating data
Status data
Common parameters
Axis parameters
Memory operation data
Positioning
sequences
Zones
Save data
Flash memory
Result
PCU’s internal memory
Speeds
Positions
Acceleration times
Deceleration times
Dwell times
Note
The user can select by means of a common parameters setting whether the axis
parameters set in the CPU Unit’s DM Area are to be transferred to the PCU for
use, or whether the axis parameters saved in the PCU’s flash memory are to be
used.
The data handled by the PCU can be classified in the way shown below.
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