Allen-Bradley LOGIX 5000 User Manual

Process Control Instructions
Chapter 1
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018 259
8. The instruction clears WindupLOut when SPLAlarm is cleared and not
(ControlAction is cleared and CVLAlarm is set) and not (ControlAction is
set and CVHAlarm is set).
The following table describes how the instruction handles execution faults:
Fault Condition Action
CVFaulted
or
CVEUSpanInv
is set
• Instruction is not initialized, CVInitializing is cleared.
• Compute PV and SP percent, calculate error, update internal parameters for EPercent and
PVPIDPercent
• PID control algorithm is not executed.
• Disable the Auto and Cascade/Ratio modes. If Override or Hand is not the current mode,
set to Manual mode.
• Set CV to value determined by Program or Operator control and mode (Manual, Override,
or Hand).
CVinitRequest Refer to Execution.
PV Health Bad
• Disable the Auto and CasRat modes. If Override or Hand is not the current mode then set
to the Manual mode.
• Set PV high-low, PV rate-of-change, and deviation high-low alarm outputs FALSE
• PID control algorithm is not executed.
• Set CV to value by determined by Program or Operator control and mode (Manual,
Override or Hand).
PVFaulted is set
• Disable the Auto and Cascade/Ratio modes. If Override or Hand is not the current mode,
set to Manual mode.
• PV high-low, PV rate-of-change, and deviation high-low alarm outputs are cleared
• PID control algorithm is not executed.
• Set CV to value by determined by Program or Operator control and mode (Manual,
Override, or Hand).
PVSpanInv is set or
SPLimitsInv is set
• Disable the Auto and Cascade/Ratio modes. If Override or Hand is not the current mode,
set to Manual mode.
• Do not compute PV and SP percent.
• PID control algorithm is not executed.
• Set CV to value by determined by Program or Operator control and mode (Manual,
Override, or Hand).
RatioLimitsInv is set and
CasRat is set and UseRatio is
set
• If not already in Hand or Override, set to Manual mode.
• Disable the Cascade/Ratio mode.
• Set CV to value determined by Program or Operator control and mode (Manual, Override,
or Hand).
TimingModeInv is set or
RTSTimeStampInv is set or
DeltaTInv is set
•
If not already in Hand or Override, set to Manual mode.
See also
Execution on page 254
Processing Faults
Select the Control Variable

Allen-Bradley LOGIX 5000 Specifications

General

Brand	Allen-Bradley
Model	LOGIX 5000
Category	Controller
Language	English