Winding/Unwinding Shaft Selection - Mitsubishi Electric A800 Plus Series Function Manual

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").
Forward
Pr.128 /reverse
setting action
setting
0 (initial
— Dancer feedback speed control invalid
value)
When deviation X (set point subtracted by measured value)
Reverse is a plus value, the manipulated amount is increased, and
40
action when the deviation is a minus value, the manipulated
amount is decreased.
When deviation X (set point subtracted by measured value)
Forward is a minus value, the manipulated amount is increased, and
41
action when the deviation is a plus value, the manipulated amount
is decreased.
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.
Pr. Name
1230
Winding/unwinding selection
R002
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.1230 setting Winding/unwinding selection
0 Winding
1 Unwinding
Operation status
20 ms or more
ON
STF
ON
X114
Setting
Initial value
range
0
0
1
Initial roll diameter
Minimum roll diameter
Maximum roll diameter
DANCER FEEDBACK SPEED CONTROL
Dancer feedback speed control details
Set point Dancer
input signal input
— —
Set in Pr.133. Set in Pr.363.
Description
Winding
Unwinding
Line speed
command
input
—
Set in Pr.361.
3
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