Siemens SITRANS PCS 7 Function Manual page 270

SIPART PS2 PA
8.1 SipPS2PA
You can simulate the following values:
● Position feedback (SimRbk, SimRbkLi)
Tracking and limiting a manipulated variable
You can correct the manipulated variable output to the tracking value MV_Trk or the
manipulated variable feedback Rbk to realize bumpless switchover. To track the manipulated
variable output, you have to set the parameter MV_TrkOn = 1.
If the parameter MV_TrkRbk = 0, the manipulated variable output is corrected to the tracking
value MV_Trk. The manipulated variable output MV is limited to the MV_HiLim and MV_LoLim
parameters.
If the parameter MV_TrkRbk = 1, the manipulated variable output is tracked to the position
feedback Rbk. There are no limits here.
The "Tracking" text is displayed additionally in the standard view of the faceplate.
Tracking has a higher priority than interlock for a control valve.
Forming the group status for interlocks
This block provides the standard "Form group status for interlock information" function that is
described in the APL Online Help.
Forming the signal status for blocks
This block provides the standard "Form and output signal status for technological blocks"
function that is described in the APL Online Help.
The signal status of the output for the manipulated variable feedback RbkOut always
corresponds to the signal status of the Rbk input or, when the block is in simulation, the signal
status of the 16#60output.
The signal status of the FbkCloseOut and FbkOpenOut outputs is fetched and sent from the
worst signal status from the RbkOut output and the corresponding feedback signal inputs
FbkClose and FbkOpen.
The signal status of the manipulated variable output MV always corresponds to the signal status
of the input parameter MV_Ext or MV_Int, depending on how the setpoint is specified. If the
internal manipulated variable MV_Int is used, the signal status 16#80 is always output.
The signal status of manipulated variable difference ER is fetched and sent from the worst
signal status of the two outputs RbkOut and MV.
The worst signal status ST_Worst for the block is formed from the following parameters:
● FbkOpenOut.ST
● FbkCloseOut.ST
● FbkAuxVOpenOut.ST
● FbkAuxVCloseOut.ST
● RbkOut.ST
● LocalLi.ST
270
SITRANS Library for PCS 7
Function Manual, 05/2019, A5E35351976-11