Smart Positioner
YT-2500 / 2550 / 2501 Series
Product Manual
Ver. 1.34
44
9.5
Manual Mode (MANUAL)
Manual mode is used to maneuver valve stem manually. In Manual mode, the positioner does not
control the valve by the signal received from outside, but it could be controlled to move up and down
by pressing <UP> and <DOWN> button.
<ENTER>
3 seconds
→
<ENTER>
→
<UP>/<DOWN>
→
Press <UP> or
<DOWN> button
if the above is not
displayed.
<ESC>
→
<ESC>
→
9.6
Parameter Mode (PARAM)
AUTO CAL optimizes most of the valve actuator control values. However, in some instances, hunting
or oscillation may occur when the valve actuator control values are not optimized. Hunting or
oscillation can be prevented by adjusting parameter values.
If you change the parameter values with <UP> <DOWN> buttons, the changed value is
immediately applied to the positioner control. When the desired control status is reached, you
must press <ENTER> button to save the values.
Below are the list of features which could be set from Parameter mode.
1)
Dead-Zone (dEAdZONE)
2)
P1 Value (KP1)
3)
D1 Value (Kd1)
4)
P2 (KP2) and D2 (Kd2) values
5)
P_ (KP_) and D_ (Kd_) Values
6)
PT1 (PT1) and PT2 (PT2) Values
7)
Period T (PERIOd T)
8)
Auto DZ (AUTO dZ)
