Automatic Restart After Instantaneous Power Failure/Flying Start With An Induction Motor - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

 Adjustment procedure for dancer roll position detection signal
• When the input of terminal 4 is voltage input, 0 V and 5 V (10 V) are the lower limit position and upper limit position,
respectively (initial value). When it is current input, 4 mA and 20 mA are the lower limit position and upper limit position,
respectively (initial value). When the potentiometer has an output of 0 to 7 V, C7 (Pr.905) must be calibrated at 7 V.
20mA 5V(10V)
4mA
(Example) To execute control at the dancer center position using a 0 to 7 V potentiometer
1.
Switch the current/voltage input selection switch to "OFF", set "2" to Pr.267 and set terminal 4 input to voltage input.
2.
Input 0 V across terminals 4 and 5, and calibrate C6 (Pr.904). (The % display that is indicated at analog calibration
is not related to the % of the feedback value.)
3.
Input 7 V across terminals 4 and 5, and calibrate C7 (Pr.905). (The % display that is indicated at analog calibration
is not related to the % of the feedback value.)
4.
Set Pr.133 to "50%".
NOTE
• After changing the Pr.267 setting, check the voltage/current selection switch. Incorrect setting may cause a fault, failure or
malfunction. (Refer to
• If the Multi-speed operation (RH, RM, RL, or REX) signal, or JOG signal is input during regular PID control, PID control is
interrupted. However, at dancer control, these signals are treated as main speed commands, so PID control is continued.
• During dancer control, Pr.44 and Pr.45 (Second acceleration/deceleration time) is the parameter for setting the acceleration/
deceleration time for the main speed command. This function does not work as a second function.
• When the switchover mode is set by setting "6" to Pr.79, dancer control (PID control) is invalid.
• The acceleration/deceleration action of the main speed command is the same as that when the frequency is increased or
decrease by analog input. The SU signal sometimes stays ON even if operation is turned ON/OFF by the start signal. The set
frequency monitor is the value "main speed command + PID control" which is constantly changing.
• With the main speed setting frequency setting, acceleration/deceleration is performed for the acceleration/deceleration time
set in Pr.44 and Pr.45, and with the output frequency setting, acceleration/deceleration is performed for the acceleration/
deceleration time set in Pr.7 and Pr.8. For this reason, with the output frequency, when the time set in Pr.7 and Pr.8 is longer
than the time set in Pr.44 and Pr.45, acceleration/deceleration is performed for the acceleration/deceleration time set in Pr.7
and Pr.8.
• The limit of the integral term is the smaller of 100% and the value after conversion of the straight line after interpolation of Pr.1
Maximum frequency by Pr.902 and Pr.903 to the PID manipulated amount.
However, note that the lower limit frequency limits the output frequency, but does not restrict the action of the integral item.
Parameters referred to
Pr.57 Restart coasting timepage 597
Pr.59 Remote function selectionpage 359
Pr.73 Analog input selectionpage 473
Pr.79 Operation mode selectionpage 370
Pr.178 to Pr.189 (Input terminal function
Pr.190 to Pr.196 (Output terminal function
Pr.561 PTC thermistor protection levelpage 394
C2 (Pr.902) to C7 (Pr.905) Frequency setting voltage (current)
5.14.14 Automatic restart after instantaneous power
failure/flying start with an induction motor
V/F V/F V/F Magnetic flux Sensorless Sensorless Vector Sensorless
Magnetic flux Magnetic flux
The inverter can be restarted without stopping the motor operation in the following situations:
0V
0% 100%
Feedback value
page 473 for the setting.)
selection)page 496
selection)page 450
bias/gainpage 482
Vector Vector
Upper limit
position
Lower limit Potentiometer, etc.
position
5. PARAMETERS
5.14 (A) Application parameters
1
2
3
4
5
6
7
8
9
10
597