Omron CJ - PROGRAMMING MANUAL 12-2009 - Page 82

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Basic Concepts Section 2-1
• When a word operand is specified for an instruction, I/O will be refreshed
for the 16 bits that are specified.
• Inputs will be refreshed for input or source operand just before an instruc-
tion is executed.
• Outputs will be refreshed for outputs or destination (D) operands just after
an instruction is execute.
Add an exclamation mark (!) (immediate refresh option) in front of the instruc-
tion.
Note Immediate refreshing is not supported by the CS1D CPU Units for Duplex-
CPU Systems, but they do support refreshing for IORF(097) and DLNK(226)
instructions.
Units Refreshed by the Immediate Refreshing (!) Specification
Note C200H I/O Units cannot be mounted to CJ-series PLCs.
Location CPU or Expansion I/O Rack (but not SYSMAC BUS Slave Racks)
Units Basic I/O Units CS/CJ-series Basic I/O
Units
Refreshed
C200H Basic I/O Unit (See
note.)
Refreshed
C200H Group-2 High-den-
sity I/O Units (See note.)
Not refreshed
Special I/O Units Not refreshed
CPU Bus Units Not refreshed
15 0
15 0
15 0
15 0
CIO 0001
CIO 0002
CIO 0003
CIO 0004
.
.
.
!LD 000101
.
.
.
!OUT 000209
.
.
.
END
.
.
.
!MOV
.
.
.
END
0003
0004
S
D
Input
Output
All real I/O
Immediate refresh
16-bit units
I/O refresh
Cyclic refresh
(batch processing)
16-bit units
I/O refresh
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