Mitsubishi Electric FR-A720-0.4K Specifications Page 40
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43
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Used to set motor acceleration/deceleration time.
Set a larger value for a slower speed increase/decrease or a
smaller value for a faster speed increase/decrease.
Use Pr.7 Acceleration time to set the acceleration time taken to reach
Pr. 20 Acceleration/deceleration reference frequency from 0Hz.
Use Pr.8 Deceleration time to set the deceleration time taken to reach
0Hz from Pr.20 Acceleration/deceleration reference frequency.
Set the current of the electronic thermal relay function to protect
the motor from overheat. This feature provides the optimum
protective characteristics, including reduced motor cooling
capability, at low speed.
Used to detect the motor overload (overheat) and stop the inverter
output transistor operation to stop the output.
Set the rated current [A] of the motor in Pr.9.
(When the power supply specification is 200V/220V(400V/440V) 60Hz,
set the 1.1 times the rated motor current.)
Set "0" in Pr.9 to make the electronic thermal relay function invalid
when using a motor with an external thermal relay, etc. (Note that
the output transistor protection of the inverter functions (E.THT).)
When using a Mitsubishi constant-torque motor
1) Set any of "1, 13 to 18, 50, 53, 54" in Pr.71. (This provides a
100% continuous torque characteristic in the low-speed range.)
2) Set the rated current of the motor in Pr.9.
When the RT signal is on, thermal protection is provided based on
the Pr.51 setting.
Use this function when running two motors of different rated currents
individually by a single inverter. (When running two motors together,
use external thermal relays.)
The DC injection brake can be operated at a motor stop to adjust
the stop timing and braking torque.
When "8888" is set in Pr. 11, DC brake is applied while X13 signal is
on.
Pr.12 is valid only under V/F control and advanced magnetic flux
vector control.
DC brake (setting "0", initial value) and zero speed control (setting
"1") can be selected using Pr.850 under real sensorless vector
control.
This function selects either zero speed control or servo lock for
braking operation when pre-excitation is performed with the LX
signal during speed control operation under vector control. Turning
on the LX signal enables the pre-excitation function.
Set the frequency at which control changes to zero speed control or
servo lock control (select using Pr.802 ) in Pr.10 and operation time in Pr.11
during vector control.
The initial value of Pr.10 automatically changes to 0.5Hz during vector
control.
You can set the starting frequency and hold the set starting
frequency for a certain period of time.
Set these functions when you need the starting torque or want
smooth motor drive at a start.
Acceleration/deceleration time setting
Pr.7 Acceleration time Pr.8 Deceleration time
Pr.20
Acceleration/deceleration reference frequency
Pr.21
Acceleration/deceleration time increments
Pr.44
Second acceleration/deceleration time
Pr.45 Second deceleration time
Pr.110
Third acceleration/deceleration time
Pr.111 Third deceleration time
Motor protection from overheat
(electronic thermal relay function )
Pr.9 Electronic thermal O/L relay Pr.51
Second electronic thermal O/L relay
Pr.
7, 8, 20, 21, 44, 45, 110, 111
P
r.
Running
frequency
Acceleration
time
Deceleration
time
Time
Pr.20
Pr.7
Pr.8
Output
frequency
(Hz)
Pr.110
Pr.111
Pr.44
Pr.45
(60Hz)
Pr.21
Setting
Description
0
(initial
value)
Increments:
0.1s
Range:
0 to 3600s
Increments and
setting range of
acceleration/
deceleration
time setting can
be changed.
1
Increments:
0.01s
Range:
0 to 360s
Pr.
9, 51
P
r.
DC injection brake, zero speed control, servo lock
Pr.10
DC injection brake operation frequency
Pr.11
DC injection brake operation time
Pr.12
DC injection brake operation voltage
Pr.802 Pre-excitation selection
Pr.850 Brake operation selection
* If the Pr.71 initial value is changed
to the setting for use with a
constant-torque motor, the Pr.12
setting changes to the
corresponding value in the above
table.
Pr.802 Setting
Braking
Operation
Description
0
(initial value)
Zero speed
control
Even under load, an attempt is made to
maintain 0r/min to keep the motor shaft
stopped.
Note that if the shaft is overcome and
turned by external force, it does not return
to the original position.
1
Servo lock
Even under load, an attempt is made to
maintain the motor shaft position.
Note that if the shaft is turned by external
force, it returns to the original position after
the external force has gone away.
Starting frequency
Pr.13 Starting frequency Pr.571 Holding time at a start
Pr.
10 to 12, 802, 850
P
r.
Time
Pr.10 Operation
frequency
Time
Pr.12
Operation
voltage
voltage
Pr.11 Operation time
Output frequency (Hz)
DC injection
brake
Pr.12 Initial
Value
When
Using the
Mitsubishi
Constant
Torque
Motor
When
Using the
Energy
Saving
Motor
3.7K or less
4%
← ←
5.5K, 7.5K
4% 2%* 3%
11K to 55K
2%
← ←
75K or more
1%
← ←
Pr.
13, 571
P
r.
Output
frequency
(Hz)
Time
Pr.13
Pr.571 setting time
Forward
rotation ON
0
60
Setting range
- [Highest level of inverter] 2
- 200V class 5
- 400V class 5
- Standard Specifications 6
- Common specifications 7
- Outline Dimension Drawings 8
- Inverter Type H H1 D D1 9
- (Unit: mm) 10
- FR-A720-75K, 90K 11
- FR-A740-110K, 132K 11
- DC reactor supplied 11
- Unit: mm) 11
- FR-A740-315K, 355K 13
- FR-A740-400K, 450K, 500K 14
- Heatsink protrusion procedure 16
- Panel cutting 17
- Inverter Type D1 18
- Terminal Connection Diagram 19
- Terminal 20
- Terminal Name Description 20
- Main circuit 22
- Control circuit 22
- Torque control 23
- Position control 23
- Operation Panel (FR-DU07) 24
- Operation mode switchover 25
- Monitor/frequency setting 25
- Parameter List 26
- Terminal Connection 27
- Terminal Specification 27
- Explanation 27
- , 2 1 0 67 33
- , 9999 1 9999 67 33
- *2 9999 55 36
- 73 38
- 0, 46, 112 39
- 1, 2, 18 39
- 3, 19, 47, 113 39
- 4 to 6, 24 to 27, 232 to 239 39
- 10 to 12, 802, 850 40
- 24 to 27 42
- Output frequency (Hz) 43
- Output frequency 43
- 31 to 36 44
- 37, 144, 505, 811 44
- 41 to 43, 50, 116, 865 44
- 55, 56, 866 45
- 57, 58, 162 to 165, 299, 611 46
- 61 to 64, 292, 293 47
- 65, 67 to 69 48
- Analog input selection 49
- 73, 242, 243, 252, 253, 267 49
- 74, 822, 826, 832, 836, 849 49
- Frequency 50
- Operation mode selection 51
- 100 equals the 53
- Modbus-RTU protocol 54
- 127 to 134, 575 to 577 55
- 135 to 139, 159 55
- 150 to 153, 166, 167 55
- 160, 172 to 174 56
- 178 to 189 57
- 190 to 196 57
- 245 to 247 58
- 251, 872 58
- 255 to 259 58
- ≠ "9999") 59
- 270 to 274, 4, 5 60
- Stop-on contact control 60
- 270, 275, 276, 6 60
- Brake sequence function 61
- 278 to 285, 292 61
- 285, 853 61
- 286 to 288 62
- 291, 384 to 386 62
- 338, 339, 550, 551 62
- 359, 367 to 369 63
- 419, 464 to 494 64
- 419, 428 to 430 64
- 420, 421, 424 64
- 804 to 806 66
- 807 to 809 66
- 818, 819 66
- 840 to 848 68
- 858, 868 68
- 862, 863 69
- 882 to 886, 665 69
- 888, 889 70
- 892 to 899 70
- C0(900), C1(901) 70
- 989, CL, ALLC, Er.CL, PCPY 71
- Protective Functions 72
- Major failures 73
- Option and Peripheral Devices 74
- Stand-alone Shared 75
- Stand-alone Option 76
- Less than D 76
- Braking torque 78
- Brake unit selection table 79
- Inverter 80
- Brake unit 80
- Recommended cable size 82
- Cable Clamp MS3057-12A 83
- MCCB INV 84
- × (Ig1+Ign+lgi+Ig2+Igm) 85
- ≥ Ig × 10) 85
- Safety Precautions 86
- 0.4K 0.75K 88
- 1.5K or 88
- Leakage currents 89
- Application to Motor 90
- Output torque 91
- Motor type 92
- Dedicated motor model lineup 92
- Motor specification 93
- Dimensions table (Unit: mm) 94
- (1500r/min series) 94
- Section BB 96
- Section B 97
- (1500r/min series) 99
- Item FR-A500(L) FR-A700 101
- Warranty 102
- International FA center 103
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