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Operation selection function 2 (Pr. 65 to Pr. 79)
PARAMETERS
3
(5) Protective functions
If any of the following errors occurs in the brake sequence mode, the inverter results in an alarm, shuts off the
output, and turns off the brake opening request signal (BOF terminal).
On the control panel (FR-DU04
-1) LED or parameter unit (FR-PU04V) screen, the following errors are displayed:
3.11 Operation selection function 2 (Pr. 65 to Pr. 79)
3.11.1 Retry function (Pr. 65, Pr. 67 to Pr. 69 )
<Setting>
• Use Pr. 65 to select the protective functions (major faults) to be activated for retries.
Error Display Description
E.MB1
(Detected speed) - (output speed) > Pr. 285 during vector control.
(Overspeed detection function)
E.MB2
Deceleration is not normal during deceleration operation (Use Pr. 284 to select this function.)
(Except stall prevention operation)
E.MB3
Brake opening request signal (BOF) turned on though the motor is at a stop.
(Gravity drop prevention function)
E.MB4
More than 2s after the run command (forward or reverse rotation) is input, the brake opening request signal
(BOF) does not turn on.
E.MB5
Although more than 2s have elapsed after the brake opening request signal (BOF) turned on, the brake
opening completion signal (BRI) does not turn on.
E.MB6
Though the inverter had turned on the brake opening request signal (BOF), the brake opening completion
signal (BRI) turned off midway.
E.MB7
Although more than 2s have elapsed after the brake opening request signal (BOF) turned off at a stop, the
brake opening completion signal (BRI) does not turn off.
When the inverter output is stopped by the protective function (major fault), this function causes the inverter to
automatically reset itself to make a retry. You can select whether retry operation is to be performed or not,
alarms reset for retry, number of retries made, and waiting time.
Parameter Name
Factory
Setting
Setting Range Remarks
65 Retry selection 0 0 to 5
Extended mode
67
Number of retries at alarm
occurrence
0
0, 1 to 10,
101 to 110
68 Retry waiting time 1s 0 to 10s
69
Retry count display
erasure
00
Errors Reset for Retry Pr. 65
Remarks
Error definition Abbreviation 0 1 2 3 4 5
Acceleration overcurrent E.OC1
Constant-speed overcurrent E.OC2
Deceleration overcurrent E.OC3
Acceleration overvoltage E.OV1
Constant-speed overvoltage E.OV2
Deceleration overvoltage E.OV3
Motor thermal relay E.THM
Transistor thermal relay E.THT
Instantaneous power failure E.IPF
Undervoltage E.UVT
Brake transistor E.BE
Earth (Ground) fault protection E.GF
Output phase failure E.LF
External thermal relay E.OHT
Stall prevention-triggered stop E.OLT
Option alarm E.OPT
Option 1 alarm E.OP1
speed torque