Allen-Bradley LOGIX 5000 Reference Manual page 121

Process Control Instructions
Mode
Program Auto Mode
Program Manual Mode
Program Hold Mode
Program Control
The following diagram shows how the RMPS instruction operates when in
Program control.
(1) In single (non-cyclic) execution, you must toggle ProgAutoReq from false to
true if one execution of the ramp/soak profile is complete and you want another
execution of the ramp/soak profile.
(2) When the instruction is configured for single execution, and the Auto mode
Ramp-Soak profile completes, the instruction transitions to Hold mode.
(3) The instruction is placed in Hold mode if PVFaulted is true or any of the
following inputs are invalid: NumberOfSegs, CurrentSegProg, or SoakTimeProg.
The following table describes the possible Program modes.
Description
While in Auto mode, the instruction sequentially executes the ramp/ soak profile.
While in Manual mode the user program directly controls the instruction's Out. The CurrentSegProg, SoakTimeProg,
and OutProg inputs are transferred to the CurrentSeg, SoakTimeLeft, and Out outputs. When the instruction is placed
in auto mode, the ramp/soak function resumes with the values last input from the user program. CurrentSegProg and
SoakTimeProg are not transferred if they are invalid.
To facilitate a "bumpless" transition into Manual mode, the CurrentSegProg, SoakTimeProg, and OutProg inputs are
continuously updated to the current values of CurrentSeg, SoakTimeLeft, and Out when ProgValueReset is set and the
instruction is not in Program Manual mode.
While in Hold mode, the instruction's outputs are maintained at their current values. If in this mode when
ProgOperReq is set to change to Operator control, the instruction changes to Operator Manual mode.
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Chapter 1
121