769
Basic I/O Unit Instructions Section 3-22
3-22 Basic I/O Unit Instructions
This section describes instructions used with I/O Units.
3-22-1 I/O REFRESH: IORF(097)
Purpose Refreshes the specified I/O words.
Ladder Symbol
Variations
Applicable Program Areas
Operands St: Starting Word
CIO 0 to CIO 999 (I/O Bit Area) or
CIO 2000 to CIO 2959 (Special I/O Unit Bit Area)
E: End Word
CIO 0 to CIO 999 (I/O Bit Area) or
CIO 2000 to CIO 2959 (Special I/O Unit Bit Area)
Note St and E must be in the same memory area.
Operand Specifications
Instruction Mnemonic Function code Page
I/O REFRESH IORF 097 769
7-SEGMENT DECODER SDEC 078 772
INTELLIGENT I/O READ IORD 222 794
INTELLIGENT I/O WRITE IOWR 223 797
DIGITAL SWITCH INPUT DSW 210 775
TEN KEY INPUT TKY 211 779
HEXADECIMAL KEY INPUT HKY 212 782
MATRIX INPUT MTR 213 786
7-SEGMENT DISPLAY OUTPUT 7SEG 214 790
IORF(097)
St
E
St: Starting word
E: End word
Variations Executed Each Cycle for ON Condition IORF(097)
Executed Once for Upward Differentiation @IORF(097)
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
Area St E
CIO Area CIO 0 to CIO 999
CIO 2000 to CIO 2959
Auxiliary Area ---
Holding Bit Area ---
Special Bit Area ---
Timer Area ---
Counter Area ---
DM Area ---
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