Siemens SIPART PS2 Series Operating Instructions Manual page 152

Parameter assignment
8.4 Description of parameters
Factory setting:
Figure 8-3
Figure 8-4
Figure 8-5
152
The FLoW scale is the standardization from 0% to 100% in the
range between the 'YA' and 'YE' parameters. Over this range, the
setpoint w is also always 0% to 100%. This results in a more or less
flow-proportional display and position feedback. The flow-propor‐
tional display and position feedback also results from the use of
process valve characteristics.
In order to calculate the control deviation, the setpoint in the display
is also shown in the corresponding scale.
Below, the example of an 80-mm linear actuator is used to illustrate
the dependence of the stroke on the scaling as well as on the 'YA'
and 'YE' scaling parameters; see the following figure.
MPOS
YNRM = MPOS or YNRM = FLoW; default: YA = 0 % and YE = 100 %
Example: YNRM = MPOS with YA = 10 % and YE = 80 %
Example: YNRM = FLoW with YA = 10 % and YE = 80 %
SIPART PS2 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E00074631-AE