Smart Positioner
YT-3100
Product Manual
Ver. 1.19
41
9.8
Control Parameters (CTL PARM)
Followings are the values changeable at the Control Parameters Mode.
1)
Dead Band (dEAdbANd)
2)
Forward P parameter (KP UP) and reverse P parameter (KP dN)
3)
Forward Integral time parameter (TI UP) and reverse Integral time parameter (TI dN)
4)
Forward D parameter (Kd UP) and reverse D parameter (Kd dN)
5)
Auto Dead band Mode (AUTO db)
6)
Performance Mode (PER)
9.8.1
Dead Band (dEAdbANd)
Deadband indicates the size of the allowable deviation that is set near the target position. If the valve
has large packing friction, this value can be adjusted and set accordingly to prevent the limit cycle
caused by the friction. If the deadband is set to 0.5 %, its range is ± 0.5 % of the target.
3 seconds
→
→
→
Press <UP> or
<DOWN> button
if the above is not
displayed.
Press <UP> or
<DOWN> button
if the above is not
displayed.
<UP>/<DOWN>
→
<ESC>
3 times
→
9.8.2
Forward P parameter (KP UP) and reverse P parameter (KP dN)
The KP parameter is the proportional control constant to the calibration signal to reduce the error
between the target position and the current position, the KP UP is applied when the valve moves in the
direction of increasing output air pressure, and KP dN is applied when the valve moves in the direction
of venting output air pressure. A larger value of gains "KP UP" or "KP dN" moves the valve faster to
reach a target position, but will tend to oscillate it if set to high. However, smaller gains improve stability,
but make it slower to reach a target position.
3 seconds
→
→
→
Press <UP> or
<DOWN> button
if the above is not
displayed.
Press <UP> or
<DOWN> button
if the above is not
displayed.
<UP>/<DOWN>
→
<ESC>
3 times
→