Dancer feedback speed control details
73
3
NOTE
• The dancer signal is clamped at ±100%.
• For the details of
C3 (Pr.902)
,
C4 (Pr.903)
,
C6 (Pr.904)
,
C7 (Pr.905)
,
C13 (Pr.917)
, and
C15 (Pr.918)
, refer to the FR-A800
Instruction Manual (Detailed).
Dancer signal input filter (Pr.1227)
• Use
Pr.1227 Dancer / tension sensor feedback input filter time constant
to set the primary delay filter for the dancer
signal input value. When
Pr.1227
= "0", the filter is not set.
3.5.7
Dancer roll position detection
A signal is output while the dancer roll position value maintains the specified normal level.
Dancer roll position detection (Pr.423, Y235 signal)
• The Dancer / tension sensor feedback detection level (Y235) signal is output when the dancer roll, which is viewed from the
target position, is within the range set in
Pr.423 Dancer position / tension feedback detection
.
• For the Y235 signal, set "235 (positive logic) or 335 (negative logic)" in one of
Pr.190 to Pr.196 (output terminal function
selection)
to assign the function to the output terminal.
3.5.8
PID offset displacement
Calibrate the zero point of the dancer roll position (PID measured value).
PID offset displacement (Pr.424, X102 signal)
• The PID offset displacement function is used to calibrate the zero point of the dancer roll position (PID measured value).
• When the dancer roll is in a certain position which is desired to be set as the zero point, turn ON the Offset displacement
input (X102) signal to add an offset to the PID measured value. Then, the dancer roll position at turning ON of the X102
signal is defined as 0%.
• At the ON edge of the X102 signal, the present input value (-100 to 100%) is written in
Pr.424 Dancer / tension sensor
feedback input offset
. A value within the range from 400 to 600% is written in
Pr.424
, considering the measured value of
0% as 500%.
• Measured value (after the offset) = Measured value (before the offset) -
Pr.424
(offset value)
NOTE
• The measured value (after the offset) is limited within the range of
±
100%.
Pr.
Name
Initial value
Setting
range
Description
423
R422
Dancer / tension sensor
feedback detection level
10%
0 to 100%
Set the normal position range of the dancer roll. Define
the percentage of deviation with respect to the target
position.
Pr.
Name
Initial value
Setting
range
Description
424
R104
Dancer / tension sensor
feedback input offset
500%
400 to 600%
The offset displacement input value is written.
Neutral position
(target position)
Upper limit
Lower limit
Pr.423
Pr.423
Dancer position detection level
Y235 is ON while the dancer roll
stays within this range.
Summary of Contents for A800 Plus Series
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