Omron CS1W-MC221 -, Operation Manual

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Data Transfer and Storage: Overview Section 4-1
There are basically three ways that the IOWR/IORD instructions can be used
to read and write data.
3. Execute autoloading from the IOWR instruction in the ladder program.
IOWR can be used to write an operation code to the command area to au-
tomatically download programs or position data from the CX-Motion. Refer
to
6-16 Automatic Loading.
Note A system setting error can occur when system parameters are transferred to
an MC Unit. To enable the parameters when this happens, save the parame-
ters in flash memory, and then turn MC Unit power OFF and ON or restart the
MC Unit.
A system setting error occurs if unit parameters and machine specification
parameters are changed without being enabled by cycling MC Unit power or
restarting the Unit. Always save the parameters in flash memory before turn-
ing MC Unit power OFF or restarting the Unit, otherwise the Unit will return to
the original system parameters.
4-1-2 Types of Data
The following types of data can be transferred by using CX-Motion, directly by
executing IOWR/IORD instruction, or by executing an IOWR instruction to
write data to the command area.
Refer to
SECTION 3 MC Unit Internal Data Configuration for details on the
data that can be written and addresses.
O: Possible, X: Not possible
Purpose Description
Reading/writing specific position data or parameters
Reading monitor data IOWR/IORD commands are used when:
• One system parameter is to be written/read.
• Data for up to four position is to be written/read.
• One item in the monitor data is to be read.
Read/writing large amounts of position data IOWR can be used to write data to the command
area to read/write data for up to 2,000 positions
at once.
Saving data to flash memory IOWR can be used to write data to the command
area to save system parameters or position data
to flash memory.
Data Content Data
structure
Read/Write
CX-Motion (note 1) IOWR/IORD Teaching Box
Read Write Save Read Write Save Read Write Save
Programs G code programs
describing positioning
operations Intermedi-
ate code
❍ ❍ ❍ × × × × × ×
Position
data Data that indicates
positions 3 words per
position
❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍
System
parame-
ters (See
note 7.) Number of axes used,
number of tasks, feed
rates, and other system
data 2 words per
parameter
❍ ❍ ❍ ❍ ❍
(note
2)
❍ ❍
(note
3)
❍
(note
3)
❍
Monitor
data Error codes, present
positions, currently
executing program
numbers, and other data 2 words per
item
❍
(note
4)
× × ❍ × × ❍
(note
5)
× ×
Command
area Special codes written
using the IOWR
instruction to transfer
position data, save data
to flash memory, or to
perform autoloading. 2 or 6 words
per com-
mand
× × × ❍
(note
6)
❍ × × × ×