103
CS/CJ/NSJ Series Instructions Reference Manual (W474)
2. Summary of Instructions
2-2 Instruction Functions
2
2-2-22 Basic I/O Unit Instructions
INTELLIGENT I/O
READ
IORD
@IORD
222
Note: CS/CJ-series CPU Unit Ver. 2.0 or later and CJ2 CPU Units only
(including CS1-H, CJ1-H, and CJ1M CPU Units from lot number
030418 or later) can read from CPU Bus Units.
Output
Required
839
INTELLIGENT I/O
WRITE
IOWR
@IOWR
223
Note: CS/CJ-series CPU Unit Ver. 2.0 or later and CJ2 CPU Units only
(including CS1-H, CJ1-H, and CJ1M CPU Units from lot number
030418 or later) can write to CPU Bus Units.
Output
Required
842
Instruction
Mnemonic
Code
Symbol/Operand Function Location
Execution
condition
Page
IORD(222)
C
S
D
C: Control data
S: Transfer
source and
number of words
D: Transfer
destination and
number of words
S
S+1
Reads the contents of the memory area for the Special I/O Unit
or CPU Bus Unit (see note).
Unit number of Special I/O Unit
Desig-
nated
number
of words
read.
IOWR(223)
C
S
D
C: Control data
S: Transfer
source and
number of words
D: Transfer
destination and
number of words
D
D+1
Outputs the contents of the CPU Unit's I/O memory area to the
Special I/O Unit or the CPU Bus Unit (see note).
Unit number of Special I/O Unit
Desig-
nated
number of
words writ-
ten.
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