Allen-Bradley LOGIX 5000 Reference Manual page 369

Select_Limit Instructions
Execution
Function Block
Condition/State
Prescan
Tag.EnableIn is false
Tag.EnableIn is true
Instruction first run
Instruction first scan
Postscan
Structured Text
Condition/State
Prescan
Normal Execution
Postscan
Example
Function Block
The RLIM instruction limits In by IncRate. If analog_input1 changes at a rate
greater than the IncRate value, the instruction limits In. The instruction sets Out
= rate limited value of In.
Structured Text
RLIM_01.In := analog_input1;
RLIM_01.IncRate := value;
RLIM(RLIM_01);
rate_limited := RLIM_01.Out;
See also
Common Attributes
Structured Text Syntax
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Action Taken
EnableIn and EnableOut bits are cleared to false.
EnableIn and EnableOut bits are cleared to false.
EnableIn and EnableOut bits are set to true
The instruction executes.
N/A
Initialize Out with the value of In.
EnableIn and EnableOut bits are cleared to false.
Action Taken
See Prescan in the Function Block table.
See Tag.EnableIn is true in the Function Block table.
See Postscan in the Function Block table.
on page 537
on page 508
Chapter 4
369