Mitsubishi Electric FR-A720-0.4K Specifications Page 61
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Features
Standard
Specifications
Outline
Dimension
Drawings
Operation
Panel
Protective
Functions
OptionsInstructionsMotorCompatibilityWarrantyInquiry
Terminal Connection
Diagram
Terminal Specification
Explanation
Parameter
List
Explanations
of
Parameters
Peripheral
Devices
64
When setting parameters, refer to the instruction manual (applied) and understand instructions.
This function is used to output from the inverter the mechanical
brake opening completion signal timing signal in vertical lift and
other applications.
This function prevents the load from dropping with gravity at a start
due to the operation timing error of the mechanical brake or an
overcurrent alarm from occurring at a stop, ensuring secure
operation.
<Operation example>
At start: When the start signal is input to the inverter, the inverter
starts running. When the internal speed command reaches
the value set in Pr.278 and the output current is not less
than the value set in Pr.279, the inverter outputs the brake
opening request signal (BOF) after the time set in Pr.280
has elapsed.
When the time set in Pr.281 elapses after the brake opening
completion signal (BRI) was activated, the inverter
increases the output frequency to the set speed.
At stop: When the speed has decreased to the frequency set in
Pr.282 , the brake opening request signal (BOF) is turned
off. When the time set in Pr.283 elapses after the brake
operation confirmation signal (BRI) was activated, the
inverter output is switched off.
* If Pr.292 = "8" (mechanical brake opening completion signal
not input), this time is the time after the brake opening request
signal is output.
1)Pr.292 = "7" (brake opening completion signal input)
2)Pr.292 = "8" (brake opening completion signal not input)
If the difference (absolute value) between the speed command
value and actual speed exceeds the Pr. 285 Speed deviation excess
detection frequency setting for longer than the time set in Pr. 853 Speed
deviation time during speed control under vector control, speed
deviation excessive occurs and error "E. OSD" appears, resulting in
a stop.
Brake sequence function
Pr.278 Brake opening frequency Pr.279 Brake opening current
Pr.280
Brake opening current detection time
Pr.281 Brake operation time at start
Pr.282 Brake operation frequency Pr.283 Brake operation time at stop
Pr.284
Deceleration detection function selection
Pr.285 Overspeed detection frequency
Pr.292
Automatic acceleration/deceleration
Pr.
278 to 285, 292
P
r.
Magnetic flux
Magnetic flux
Magnetic flux
Sensorless
Sensorless
Sensorless Vector
Vector
Vector
STF
ON
Output I
Brake opening request
(BOF signal)
ON
Electromagnetic brake
operation
Opened
Closed
Closed
Time
Brake opening completion
(BRI signal)
ON
Pr.278
Pr.282
Target frequency
Pr.13
Pr.280
Pr.281
Output frequency(Hz)
Pr.283
Pr.279
STF
ON
I
ON
Pr.278
Pr.282
Target frequency
(Hz)
Pr.281
Pr.283
Pr.280
Pr.279
Pr.13
Output frequency
Output
Brake opening request
(BOF signal)
Electromagnetic brake
operation
Closed
Opened
Closed
Time
Pr.
Number
Setting
Range
Description
278 0 to 30Hz
Set to the rated slip frequency of the motor + about
1.0Hz.
This parameter may be only set if Pr.278 ≤ Pr.282.
279 0 to 220%
Generally, set this parameter to about 50 to 90%. If
the setting is too low, the load is liable to drop due to
gravity at start.
Suppose that the rated inverter current is 100%.
280 0 to 2s
Generally, set this parameter to about 0.1 to 0.3s.
281 0 to 5s
Pr.292 = 7: Set the mechanical delay time until the
brake is loosened.
Pr.292 = 8: Set the mechanical delay time until the
brake is loosened+about 0.1 to 0.2s.
282 0 to 30Hz
At this frequency, the brake opening request signal
(BOF) is switched off.Generally, set this parameter to
the Pr.278 setting + 3 to 4Hz.
This parameter may only be set if Pr.282 ≥ Pr.278.
283 0 to 5s
Pr.292 =7: Set the mechanical delay time until the
brake is closed + 0.1s.
Pr.292 =8: Set the mechanical delay time until the
brake is closed + 0.2 to 0.3s.
284
0
(initial value)
Deceleration is not detected.
1
If deceleration is not normal during deceleration
operation, the inverter alarm (E.MB2) is provided to
shut off the output and turn off the brake opening
request signal (BOF).
285
0 to 30Hz
When brake sequence function is made valid under
encoder feedback control
If (detected frequency) - (output frequency) > Pr.285
the inverter alarm (E.MB1) is provided to shut off the
output and turn off the brake opening request signal
(BOF).
9999
(initial value)
Overspeed is not detected.
292
0, 1, 3,
5 to 8, 11
Brake sequence function is made valid when a setting
is "7 or 8".
Speed deviation excess detection
Pr.285 Speed deviation excess detection frequency
Pr.853 Speed deviation time
Pr.
285, 853
P
r.
Vector
Vector
Vector
(Hz)
Set frequency
Actual speed
Time
Speed deviation
excessive error activated
(E. OSD)
ONOFF
A
larm output
(across A-C)
Pr.853
Pr.285
Output frequency
- [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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