Allen-Bradley Logix5000 Reference Manual page 103

Condition
Prescan
Rung-condition-in is false
Rung-condition-in is true
Examine
storage bit.
Storage bit remains set.
Rung-condition-out is set to
Postscan
Execution:
Relay Ladder Action
The storage bit is set to prevent an invalid trigger during the first scan.
The rung-condition-out is set to false.
The storage bit is cleared.
The rung-condition-out is set to false.
Storage Bit = 0
storage bit = 1
false.
The storage bit is cleared.
The rung-condition-out is set to false.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Bit Instructions (XIC, XIO, OTE, OTL, OTU, ONS, OSR, OSF, OSRI, OSFI)
Storage bit is set.
Rung-condition-out
is set to true.
End
Chapter 2
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