Examine If Open (XIO)

Examine If Open (XIO)

The XIO instruction examines the data bit to set or clear the rung condition.
Available Languages
Ladder Diagram
Ladder Diagram_Examine If Open (XIO)_v1
Operands
Ladder Diagram
Operand
Data Type
Format
Description
Data bit
BOOL
tag
Bit to be tested. There are various operand addressing modes possible for the data bit, see Bit Addressingfor examples.
Affects Math Status Flags
No
Major/Minor Faults
None specific to this instruction. See Index through arrays for array-indexing faults.
Execution
Ladder Diagram
Condition/State
Action Taken
Prescan
N/A
Rung-condition-in is false
Set Rung-condition-out to Rung-condition-in
Rung-condition-in is true
If Data Bit is true, rung-condition-out is cleared to false.
If Data Bit is false, rung-condition-out is set to true.
Postscan
N/A
Examples
Example 1
Ladder Diagram
FTStudio-XIO-LD-EX1-V1
If Limit_Switch_01 is false, the next instruction is enabled.
Example 2
Ladder Diagram
FTStudio-XIO-LD-EX2-V1
If S:V is false, this enables the next instruction.
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