Allen-Bradley LOGIX 5000 User Manual

Process Control Instructions
Chapter 1
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018 149
In either case, if the Periodic Task time is dynamically changed, or the
OversampleDT is dynamically changed, the block will perform a ModelInit.
The following TimingMode setting are not recommended due to jitter in DeltaT:
• TimingMode = 0 (Periodic) while executing these function blocks in a
Continuous or Event Task
• TimingMode = 2 (RealTimeSample)
Function Block
Operands Type Format Description
CC tag COORDINATED CONTROL structure CC Structure
Structure
Input Parameters Data Type Description Valid and Default Values
EnableIn BOOL Enable Input. If False, the function
block will not execute and outputs are
not updated.
Default=TRUE
PV REAL Scaled process variable input. This
value is typically read from an analog
input module.
Valid = any float
Default = 0.0
PVFault BOOL PV bad health indicator. If PV is read
from an analog input, then PVFault
will normally be controlled by the
analog input fault status.
If PVFault is TRUE, it indicates an error
on the input module, set bit in Status.
FALSE = Good Health
Default = FALSE
PVUEMax REAL Maximum scaled value for PV. The
value of PV and SP that corresponds to
100% span of the Process Variable.
If PVEUMax ≤ PVEUMin, set bit in
Status.
Valid = PVEUMin < PVEUMax ≤ maximum
positive float
Default = 100.0
PVUEMin REAL Minimum scaled value for PV. The
value of PV and SP that corresponds to
0% span of the Process Variable.
If PVEUMax ≤ PVEUMin, set bit in
Status.
Valid = maximum negative float ≤
PVEUMin < PVEUMax
Default = 0.0
SPProg REAL SP Program value, scaled in PV units.
SP is set to this value when the
instruction is in Program control.
Valid = SPLLimit to SPHLimit
Default = 0.0
SPOper REAL SP Operator value, scaled in PV units.
SP set to this value when in Operator
control.
If value of SPProg or SPOper <
SPLLimit or > SPHLimit, set bit in
Status and limit value used for SP.
Valid = SPLLimit to SPHLimit
Default = 0.0
SPHLimit REAL SP high limit value, scaled in PV units.
If SPHLimit < SPLLimit or SPHLimit >
PVEUMax, set bit in Status.
Valid = SPLLimit to PVEUMax
Default = 100.0

Allen-Bradley LOGIX 5000 Specifications

General

Brand	Allen-Bradley
Model	LOGIX 5000
Category	Controller
Language	English