Delta VFD-BW Series, User Manual

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Chapter 5 Parameters
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VFD-BW Series
5-104 Revision May 2009, BWE0, SW V1.05
The tension control is disabled when this parameter is set to 00 and enabled when it is set to
01.
When tension control is enabled, firstly, master frequency is calculated by the line speed and
reel diameter, then the feedback tension signal (set in Pr.10-27) and tension target (set in
Pr.10-25) make a closed-loop PID control, so as to tune the output frequency of AC motor
drive.
Closed-loop, speed mode
+
-
10-25
&
10-26
10-27
PI
10-29 & 10-30
10-32 & 10-33
Limit
+
+
PID output frequenc y
10-35=0 *1
10-35=1 *-1
10-23 & 10-24
mechanical gear r ati o
output
frequency
master fr equenc y
reel diameter
line speed
Motor
Mo tor
AFM or DF M
AI
FW D or R EV
MO=d1
AI
AI or PG2
FW D
D rive 1
D ri ve 2
frequency
set ting
operati on
comm and
tension feedback
li ne speed input
operati on command
In tension control mode, Pr.02-00/Pr.02-13 (Source of first/second master frequency command)
are disabled.
The formula for master frequency is: F=(V×P×G)/(120× π ×D), where V: current line speed, P:
number of motor poles, G: mechanical gear ratio, D: reel diameter.