Siemens SITRANS PCS 7 Function Manual page 279

Continued table:
Local‐
Act
-
-
-
0
0
0
0
0
0
1
"Actuator active" information
● With PosReached.Value = 0, the following applies:
With PosDiClose < MV < PosDiOpen, the control valve is detected as active and bit 24 is
set in Status1.
● The following applies to PosReached.Value = 1: Status1.Bit 24 = 0
This status can be used to indicate a customized symbol in the process image, for example, and
is saved in the status word (see Status word section in Description of SipPS2PA (Page 261)).
General function "MV difference"
The manipulated variable difference is sent to the ER output and is calculated with the following
formula:
ER = MV - Rbk
SITRANS Library for PCS 7
Function Manual, 05/2019, A5E35351976-11
MV_Tr MV_Trk MV_Ex‐
kOn Rbk tAct
- - -
- - -
- - -
0 - 0
0 - 1
0 - 1
0 - 1
1 0 -
1 1 -
- - -
MV = Limit
MV_Forced None
MV_OpScale.Low MV_OpS‐
cale.Low
MV_OpScale.High MV_OpS‐
cale.High
MV_Int MV_HiLim
MV_LoLim
MV_ExtOut MV_HiLim
MV_LoLim
MV_Int MV_HiLim
MV_LoLim
MV_ExtOut MV_HiLim
MV_LoLim
MV_Trk MV_HiLim
MV_LoLim
Rbk None
Rbk None
SIPART PS2 PA
8.1 SipPS2PA
State
Forced tracking
without limit
Forced close
Forced open
Manual mode
with internal ma‐
nipulated variable
Manual mode
with external ma‐
nipulated varia‐
ble and limit
Automatic with
external manipu‐
lated variable and
limit
Automatic with
external manipu‐
lated variable and
limit
Tracking with lim‐
itation
Tracking to posi‐
tion feedback
without limit
Local mode with
tracking to posi‐
tion feedback
without limit
279