Logix5000 Controllers General Instructions - SLAC Confluence

Function Block Attributes 653Input Parameter Data Type DescriptionRTSTime DINT Module update period for real time sampling timing. The expected DeltaT update period is inmilliseconds. The update period is normally the value that was used to configure themodule’s update time. If invalid, the instruction sets the appropriate bit in Status anddisables RTSMissed checking.valid = 1 to 32,767msdefault = 1RTSTimeStamp DINT Module time stamp value for real time sampling timing. The time stamp value thatcorresponds to the last update of the input signal. This value is used to calculate DeltaT. Ifinvalid, the instruction sets the appropriate bit in Status, disables execution of the controlalgorithm, and disables RTSMissed checking.valid =1 to 32,767ms (wraps from 32767 to 0)1 count = 1 milliseconddefault = 0Output parametersOutput Parameter Data Type DescriptionDeltaT REAL Elapsed time between updates. This is the elapsed time in seconds used by the controlalgorithm to calculate the process output.Periodic: DeltaT = task scan rate if task is Periodic task, DeltaT = elapsed time since previousinstruction execution if task is Event or Continuous taskOversample: DeltaT = OversampleDTReal Time Sampling: DeltaT = (RTSTimeStamp n - RTSTimeStamp n-1 )Status DINT Status of the function block.TimingModeInv BOOLInvalid TimingMode value.(Status.27)RTSMissed (Status.28) BOOL Only used in real time sampling mode. Set when ABS | DeltaT - RTSTime | > 1 (.001 second).RTSTimeInvBOOLInvalid RTSTime value.(Status.29)RTSTimeStampInv BOOLInvalid RTSTimeStamp value.(Status.30)DeltaTInv (Status.31) BOOL Invalid DeltaT value.Publication 1756-RM003I-EN-P - January 2007