Allen-Bradley LOGIX 5000 User Manual

Process Control Instructions
Chapter 1
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018 143
Major/Minor Faults
None specific to this instruction. See Common Attributes for operand-related
faults.
Execution
Function Block
Condition/State Action Taken
Prescan EnableIn and EnableOut bits are cleared to false.
Tag.EnableIn is false EnableIn and EnableOut bits are cleared to false.
Tag.EnableIn is true EnableIn and EnableOut bits are set to true.
The instruction executes.
Instruction first run Total is set to ResetValue.
OldTotal is cleared to 0.0.
ProgOper is cleared to false.
Instruction first scan All operator request inputs are cleared to false. If
ProgValueReset is true then all program request inputs
are cleared to false.
Postscan EnableIn and EnableOut bits are cleared to false.
Structured Text
Condition/State Action Taken
Prescan See Prescan in the Function Block table.
Normal Execution See Tag.EnableIn is true in the Function Block table.
Postscan See Postscan in the Function Block table.
Check for Low Input Cutoff
If (In <= LowInCutoff), the instruction sets LowInCutoffFlag to true and makes
In(n-1) = 0.0.
Otherwise, the instruction clears LowInCutoffFlag to false.
When the LowInCutoffFlag is true, the operation mode is determined but
totalization ceases.
When LowInCutoffFlag is false, totalization continues that scan.

Allen-Bradley LOGIX 5000 Specifications

General

Brand	Allen-Bradley
Model	LOGIX 5000
Category	Controller
Language	English