Mitsubishi FR-A740-00023-EC, Инструкция по эксплуатации

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Motor brake and stop operation
(4) 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).
Error Display Description
E.MB1
(Detection frequency) - (output frequency) > Pr. 285 during encoder feedback control
When Pr. 285 Overspeed detection frequency = 9999, overspeed is not detected.
E.MB2
Deceleration is not normal during deceleration operation from the set frequency to the frequency set in
Pr. 282 . (when Pr. 284 =1) (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
Although more than 2s have elapsed after the start 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.
CAUTION
⋅
Overspeed detection (Pr. 285) is valid under encoder feedback control (used with the FR-A7AP option) even if a value other than
"7 or 8" is set in
Pr. 292
.
⋅
A too large setting of Pr. 278 Brake opening frequency activates stall prevention operation and may cause E.MB4.
♦
Parameters referred to
♦
Pr. 80 Motor capacity, Pr. 81 Number of motor poles Refer to page 87
Pr. 180 to Pr. 186 (input terminal function selection) Refer to page 222
Pr. 190 to Pr. 195 (output terminal function selection) Refer to page 230
Pr. 800 Control method selection Refer to page 87
Encoder feedback control Refer to page 367