Mitsubishi Electric A800 Plus Series Function Manual page 206

Example setting of parameters
The following shows mechanical specifications and parameter settings required for configuring the system shown as the
application example. The parameter settings are examples for a 7.5 kW motor and the 11 kW inverter used for the winding
roller.
Item
Minimum roll diameter 280 mm
Maximum roll diameter 400 mm
Gear ratio 1/1.2
Maximum speed of the
2000 m/min
actual line
Dancer signal 0 to 10 V input
Pr. Parameter name
7 Acceleration time
8 Deceleration time
9 Electronic thermal O/L relay
DC injection brake operation
10
frequency
Operation panel main monitor
52
selection
71 Applied motor
73 Analog input selection
79 Operation mode selection
80 Motor capacity
81 Number of motor poles
83 Rated motor voltage
84 Rated motor frequency
128 PID action selection
129 PID proportional band
∗1
130 PID integral time
∗1
133 PID action set point
∗1
134 PID differential time
∗1
180 RL terminal function selection
181 RM terminal function selection
Specification
Initial Setting
value value
15 s 0.1 s
15 s 0.1 s
Inverter
rated
0 A
current
3 Hz 0 Hz
0 22
0 30
1 10
0 2
9999 7.5 kW
9999 4 (poles)
200 V 164 V
9999 51 Hz
0 41
100% 250%
1 s 5 s
500% 550%
9999 0.05 s
0 114
1 109
Item
Analog signal, 0 to 10 V input (90
Line speed command seconds cushion time enabled at
acceleration/deceleration)
Initial roll diameter
Disabled
calculation
Roll diameter storage Enabled
Tension setting output Required
Remarks
Use these parameters to improve trackability of the dancer
feedback speed control.
(In this example, 0.1 seconds is applied to avoid the influence
of external noises. Setting a larger value worsen the
trackability.)
Setting for a specific motor for Vector control (motor with built-
in thermal protector).
Set "22" (Roll diameter) for monitoring.
Or use any of Pr.774 to Pr.776 when using the 3-line monitor
screen on the PU.
Other monitor items related to this application and their
setting values are as follows:
26 (Line speed command), 27 (Actual line speed), 28 (Dancer
compensation speed), 29 (Winding length), 52 (PID set
point), 53 (PID measured value), and 54 (PID deviation).
30: Setting for the Mitsubishi Electric Vector control dedicated
motor SF-V5RU.
10: Terminal 2 input between 0 to 10 V for the line speed and
terminal 1 input between 0 to 10 V for the dancer signal with
reversible polarity.
2: External operation mode only.
Set these parameters according to the motor.
41: Dancer control enabled (forward action)
(Compensation direction of the dancer signal is reversed
since the lower limit of the dancer signal output is 8 V and the
upper limit is 2 V.)
Performing tension PI gain tuning allows setting these
parameters.
Set Pr.52 = "86" (Terminal 1 input after calibration in %) to
check the upper and lower limit of the dancer roll position. Set
the target position (neutral position) in this parameter
according to the check result.
To improve trackability of a mechanical extraneous
disturbance (variation), set 0.01 seconds at first, and change
the setting to a slightly larger value as required. (Set the
minimum possible value because setting a too large value
causes hunting.)
114: Tension control selection (X114) signal ON (Setting "114"
is required for tension control.)
109: Stored winding diameter clear (X109) signal ON (Setting
"109" clears the stored roll diameter.)
Application examples
Specification
205
APPENDIX
10