41
Winding diameter compensation
function
(5) Integral term limit at start
(Pr. 795)
/ PID term limit at start
(Pr. 796)
Set the limit for manipulated variable of PID control for dancer roll to prevent a motor from over-speeding at an initial
winding diameter calculation. Set the limit for integral control action of PID control in
Pr. 795
, and set the limit for
manipulated variable of PID control in
Pr. 796
.
(6) Output signal for winding diameter calculation completion at start (Y51 signal)
After winding diameter calculation at start is completed, Y51 signal can be output. Completion of winding diameter
calculation can be checked by looking at Y51 signal when using initial winding diameter calculator function.
After Y51 signal turns ON, increase the main speed setting, and accelerate the line speed. (Provide mechanical
interlocks for operation of devices and Y51 signal)
If the dancer roll falls below the initial winding diameter calculation start point during STF=OFF, the signal output becomes
OFF.
Set "51 (positive logic) or 151 (negative logic)" in any of
Pr. 190 to Pr. 196 (Output terminal function selection)
to assign
Y51 signal to an output terminal.
PID calculated value =
kp (1 +
1
+ Td
S)
Ti
S
Pr. 190 to Pr.196
Setting
Signal
Function
Description
Positive
logic
Negative
logic
51
151
Y51
Winding diameter calculation
completion at a start
The signal is output when winding diameter calculation
at a start is completed.
REMARKS
Y51 signal is in OFF state during reset.
Deviation
Kp
1
Td S
Manipulated variable
Pr. 795
(Integral term limit at start)
Pr. 796
(PID term limit
at start)
+
+
Ti S
Dancer roll position
Winding diameter
Pr. 797
Rotation speed at winding diameter
calculated value activation
OFF
Dead zone 2
Target dancer position
Start signal
(STF/STR)
Winding diameter
calculation results
Winding diameter calculation
completion (Y51 signal)
Main speed setting
ON
OFF
ON
