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Basic I/O Unit Instructions Section 3-22
Be sure to place condition flags directly after IORD(222) instructions, and not
after any other instructions. If a condition flag is placed after another instruc-
tion, it will be affected by the execution results of that instruction.
Example In this example, IORD(222) is used to read data.
3-22-9 INTELLIGENT I/O WRITE: IOWR(223)
Purpose Outputs the contents of the CPU Unit’s I/O memory area to a Special I/O Unit
or CPU Bus Unit.
This instruction can be used in the CP1H CPU Units only. It cannot be used in
the CP1L CPU Units. If IOWR(223) is used in a CP1L CPU Unit, Error Flag
(ER) will be turned ON.
Ladder Symbol
Variations
Applicable Program Areas
S+1 S
S
0.00 1000.00
1000.01
D100
1000.00
1000.01
D100
D109
CPU Unit
Special I/O Unit (Unit #3)
10 words
The control code (C) varies depending on the Special I/O Unit.
Number of words
to transfer: 10
Unit number: 3
When CIO 0.00 is turned ON, 10 words are read from the Special I/O
Unit with unit number 3, and are stored in D100 to D109.
IOWR(223)
C
S
D
C: Control data
S: Transfer source and number of words
D: Transfer destination and number of words
Variations Executed Each Cycle for ON Condition IOWR(223)
Executed Once for Upward Differentiation @IOWR(223)
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification Not supported.
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
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