LS Industrial Systems SV-iV5 Series - WEB_34(PID Gain Ramp Time Setting)

7. WEB Control Application
7-32
I controller
7) WEB_34 PIDGain RAMP : PID Gain Ramp Time Setting
Sudden change in PI Gain may cause unexpected oscillation. To avoid such phenomenon, you need to carry out
setting in slow way for a certain period of time when you transfer gain. This is the function of transferring the gain
as shown in the Figure when setting multi-function input(DIO_01 ~ DIO_07) to “PI Gain Sel” and then powering it
On.
Function
Code
Loader Display Name of Function Set Range Unit
Factory
Default
WEB_34 PIDGain RAMP PID Gain Ramp Time Setting 0.1 ~ 100.0 sec 1.0
PI Gain Ramp Time
8) WEB_35 P Profiler : Process PID P Gain Profiler Type Setting
9) WEB_36 P Apt Gain : Process PID P Gain Profiler Gain Setting
In case of Winder, the inertia increases as the diameter increases when winding the web. Therefore, P Gain has to
change to achieve the same winding performance regardless of the increase of inertia following the increased
diameter. There exist four (4) types of profiles; Linear, Square, Cubed, and Quadratic being decided in accordance
with the kind of web. WEB_35 P Profiler is the function code that sets the type of P Gain Profiler, while WEB_37 P
Apt Gain is the function code that sets the gain applicable to P Gain Profiler. If WEB_36 P Apt Gain is set as 0,
Profiler function doesn’t operate..
Error
Integral
Controller
100%
I gain(time)
100%
P Gain
P2 Gain
Contact
Kp1
Kp2
PI Gain Ramp time(WEB-34)
I Gain
Ki1
Ki2