Dancer feedback speed control details
74
3.5.9
Dancer roll malposition detection
When a break occurs and the dancer roll falls, dancer feedback speed control is used to prevent the motor speed from
increasing.
Dancer roll malposition detection (break detection) (Pr.131, Pr.132, Pr.425)
• Set the upper limit of the dancer roll position in
Pr.131 PID upper limit
. Set the lower limit of the dancer roll position in
Pr.132 PID lower limit
.
• When the dancer roll position goes higher than the position set in
Pr.131
, the FUP signal is output. When the position goes
lower than the position set in
Pr.132
, the FDN signal is output.
• When the dancer roll position remains higher than the position set in
Pr.131
or lower than the position set in
Pr.132
for the
time set in
Pr.425 Break detection waiting time
or longer, the condition is determined as the dancer roll malposition
(break), and compensation by PID control becomes 0. The winding diameter at the time of malposition detection is
retained.
• When the dancer roll malposition (break) is detected, the Break detection (Y231) signal can be output.
• When the following two conditions are both met, dancer feedback speed control (PID calculation) is resumed.
- The motor is stopped or output is shutoff.
- The start signal is OFF.
• For using each signal, use
Pr.190
and
Pr.196 (output terminal function selection)
to assign the function referring to the
following table.
Pr.
Name
Initial value
Setting
range
Description
131
A601
PID upper limit
9999
400 to 600%
Set the value for outputting the PID upper limit (FUP) signal.
9999
No function
132
A602
PID lower limit
9999
400 to 600%
Set the value for outputting the PID lower limit (FDN) signal.
9999
No function
137
R163
PID upper/lower limit
hysteresis width
9999
0 to 100%
Set the hysteresis width for the FUP and FDN signals.
9999
No function
425
R160
Break detection waiting time
9999
0 to 100 s
Set the time until the dancer roll malposition is determined.
9999
Break detection disabled
Output
signal
Pr.190 to Pr.196 setting
Positive logic
Negative logic
FDN
14
114
FUP
15
115
Y231
231
331
Winding diameter
compensation amount
Break detection
Start command
ON
OFF
OFF
OFF
ON
Y231
Pr.425
(Break detection waiting time)
PID compensation amount = 0
Normal operation
Dancer roll falling to the lower limit
Dancer roll neutral position
Turns OFF when the
motor stops running and
the start command turns
OFF.
Line speed command
Motor speed
Dancer lower limit position
(Pr.132)
Содержание A800 Plus Series
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