472 Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Chapter 11 Program Control Instructions (JMP, LBL, JSR, RET, SBR, JXR, TND, MCR, UID, UIE, AFI, NOP, EOT, SFP, SFR, EVENT)
Always False Instruction
(AFI)
The AFI instruction sets its rung-condition-out to false.
Operands:
Relay Ladder
None
Description: The AFI instruction sets its rung-condition-out to false.
Arithmetic Status Flags: Not affected
Fault Conditions: None
Execution:
Example: Use the AFI instruction to temporarily disable a rung while you are debugging a
program.
When enabled, the AFI disables all the instructions on this rung.
Condition Relay Ladder Action:
Prescan The rung-condition-out is set to false.
Rung-condition-in is false The rung-condition-out is set to false.
Rung-condition-in is true The rung-condition-out is set to false.
Postscan The rung-condition-out is set to false.
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