Allen-Bradley LOGIX 5000 Reference Manual page 68

Chapter 1 Process Control Instructions
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Structured Text
PIDE(PIDE_tag);
Operands
Function Block
Operand Type
PIDE tag PID_ENHANCED
autotune tag PIDE_AUTOTUNE
Structured Text
Operand Type
PIDE tag PID_ENHANCED
See Structured Text Syntax for more information on the syntax of expressions
within structured text.
PIDE Structure
Input Parameter Data Type Description
EnableIn BOOL
PV REAL
PVFault BOOL
PVEUMax REAL
PVEUMin REAL
SPProg REAL
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Format
structure
structure
Format
structure
Enable input. If false, the instruction does not execute and outputs are not updated.
Default is true.
Scaled process variable input. This value is typically read from an analog input module.
Valid = any float
Default = 0.0
PV bad health indicator. If PV is read from an analog input, then PVFault is normally
controlled by the analog input fault status. When PVFault is true, it indicates the input
signal has an error.
Default is false = "good health"
Maximum scaled value for PV. The value of PV and SP which corresponds to 100 percent
span of the Process Variable.
Valid = PVEUMin < PVEUMax maximum positive float
Default = 100.0
Minimum scaled value for PV. The value of PV and SP which corresponds to 0 percent
span of the Process Variable.
Valid = maximum negative float
Default = 0.0
SP program value, scaled in PV units. SP is set to this value when in Program control
and not Cascade/Ratio mode. If the value of SPProg < SPLLimit or > SPHLimit, the
instruction sets the appropriate bit in Status and limits the value used for SP.
Valid = SPLLimit to SPHLimit
Default = 0.0
Description
PIDE structure
(optional)
autotune structure
Description
PIDE structure
PVEUMin < PVEUMax