Mitsubishi Electric A800 Plus Series, Руководство по эксплуатации функций

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Application examples
APPENDIX
205
10
 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 Specification Item Specification
Minimum roll diameter 280 mm
Line speed command
Analog signal, 0 to 10 V input (90
seconds cushion time enabled at
acceleration/deceleration)
Maximum roll diameter 400 mm
Gear ratio 1/1.2
Initial roll diameter
calculation
Disabled
Maximum speed of the
actual line
2000 m/min Roll diameter storage Enabled
Dancer signal 0 to 10 V input Tension setting output Required
Pr. Parameter name
Initial
value Setting
value
Remarks
7 Acceleration time 15 s 0.1 s
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.)
8 Deceleration time 15 s 0.1 s
9 Electronic thermal O/L relay
Inverter
rated
current
0 A
Setting for a specific motor for Vector control (motor with built-
in thermal protector).
10
DC injection brake operation
frequency
3 Hz 0 Hz
52
Operation panel main monitor
selection
0 22
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).
71 Applied motor 0 30
30: Setting for the Mitsubishi Electric Vector control dedicated
motor SF-V5RU.
73 Analog input selection 1 10
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.
79 Operation mode selection 0 2 2: External operation mode only.
80 Motor capacity 9999 7.5 kW
Set these parameters according to the motor.
81 Number of motor poles 9999 4 (poles)
83 Rated motor voltage 200 V 164 V
84 Rated motor frequency 9999 51 Hz
128 PID action selection 0 41
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.)
129
∗1
PID proportional band 100% 250%
Performing tension PI gain tuning allows setting these
parameters.
130
∗1
PID integral time 1 s 5 s
133
∗1
PID action set point 500% 550%
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.
134
∗1
PID differential time 9999 0.05 s
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.)
180 RL terminal function selection 0 114
114: Tension control selection (X114) signal ON (Setting "114"
is required for tension control.)
181 RM terminal function selection 1 109
109: Stored winding diameter clear (X109) signal ON (Setting
"109" clears the stored roll diameter.)