Mitsubishi Electric FR-E720-600 Instruction Manual page 125

(3) When a high power factor converter (FR-HC) is used and automatic restart after instantaneous
power failure function is made valid.
When automatic restart after instantaneous power failure function of both the FR-HC and inverter is made valid (when a
value other than "9999" is set in Pr. 57 Restart coasting time), set "2" in Pr. 30 .
Set Pr. 70 to "0%" (initial value).
When the FR-HC detects power failure during inverter operation, the RDY signal turns on, resulting in the motor coasting.
Turning the RDY signal off after power restoration, the inverter detects the motor speed (depends on the Pr.162 Automatic
restart after instantaneous power failure selection ) and restarts automatically after instantaneous power failure.
(4) Regenerative brake duty alarm output and alarm signal (RBP signal)
100%: regenerative overvoltage protection operation value
Ratio of the brake
duty to the Pr. 70
setting (%)
100
85
Regenerative brake
pre-alarm (RBP)
OFF
REMARKS
The MRS signal can also be used instead of the X10 signal. (Refer to page 133)
Refer to page 29 to 33 for connecting the brake resistor (MRS type, MYS type), high-duty brake resistor (FR-ABR), brake unit
(FR-BU2), high power factor converter (FR-HC), and power regeneration common converter (FR-CV).
NOTE
When terminal assignment is changed using Pr. 178 to Pr. 184 (input terminal function selection) and Pr. 190 to Pr. 192 (output
terminal function selection), the other functions may be affected. Make setting after confirming the function of each
terminal. (Refer to page 131)
The value set in Pr. 70 must not exceed the setting of the brake resistor used.
Otherwise, the resistor can overheat.
Parameters referred to
Pr. 57 Restart coasting time
Pr. 178 to Pr. 184 (input terminal function selection)
Pr. 190 to Pr. 192 (output terminal function selection)
Time
ON ON
WARNING
Refer to page 154
Refer to page 131
Refer to page 137
Motor brake and stop operation
[RB] appears on the operation panel and an alarm
signal (RBP) is output when 85% of the regenerative
brake duty set in Pr. 70 is reached. If the regenerative
brake duty reaches 100% of the Pr. 70
regenerative overvoltage (E.OV1 to E.OV3) occurs.
Note that [RB] is not displayed when Pr. 30 = "0".
The inverter does not trip even when the alarm (RBP)
signal is output.
For the terminal used for the RBP signal output, assign
the function by setting "7 (positive logic) or 107
(negative logic)" in any of Pr. 190 to Pr. 192 (output
terminal function selection) .
setting, a
4
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