Dancer feedback speed control details
59
3
PID action selection (Pr.128)
• Set forward or reverse action according to the control target.
• The following table shows the input method for the set point, dancer signal, and line speed command for the dancer
feedback speed control function (
Pr.128
= "40 or 41").
NOTE
• The automatic restart after instantaneous power failure function is not activated while dancer feedback speed control is valid
(
Pr.128
= "40 or 41").
• To perform dancer feedback speed control, set
Pr.127 PID control automatic switchover frequency
= "9999" (initial value).
(If the
Pr.127
setting is other than "9999", a sudden speed change may occur.)
Tension control selection signal (X114 signal)
• To enable the dancer feedback speed control, turn ON the Tension control selection (X114) signal and set "40 or 41" in
Pr.128
PID action selection
.
• To input the X114 signal, set "114" in any of
Pr.178 to Pr.189 (input terminal function selection)
to assign the function.
• After turning ON the X114 signal, wait 20 ms or longer to input a start command (STF/STR).
PID compensation disabled signal (X116 signal)
• PID compensation can be disabled by turning ON the X116 signal. To input the X18 signal, set "116" in any of
Pr.178 to
Pr.189 (input terminal function selection)
to assign the function.
3.5.2
Winding/unwinding shaft selection
Select whether the target roll is a winding shaft or unwinding shaft.
Winding/unwinding selection (Pr.1230)
• Use
Pr.1230 Winding/unwinding selection
to select whether the target roll is a winding shaft or unwinding shaft.
• The initial diameter of the winding shaft is selected according to whether the operation is winding or unwinding.
Pr.128
setting
Forward
/reverse
action
setting
Operation status
Set point
input
Dancer
signal input
Line speed
command
input
0 (initial
value)
—
Dancer feedback speed control invalid
—
—
—
40
Reverse
action
When deviation X (set point subtracted by measured value)
is a plus value, the manipulated amount is increased, and
when the deviation is a minus value, the manipulated
amount is decreased.
Set in
Pr.133
.
Set in
Pr.363
.
Set in
Pr.361
.
41
Forward
action
When deviation X (set point subtracted by measured value)
is a minus value, the manipulated amount is increased, and
when the deviation is a plus value, the manipulated amount
is decreased.
Pr.
Name
Initial value
Setting
range
Description
1230
R002
Winding/unwinding selection
0
0
Winding
1
Unwinding
Pr.1230 setting
Winding/unwinding selection
Initial roll diameter
0
Winding
Minimum roll diameter
1
Unwinding
Maximum roll diameter
STF
X114
20 ms or more
ON
ON
Summary of Contents for A800 Plus Series
Page 240: ...239 MEMO ...
