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Motor brake and stop operation
(1) When the brake unit (FR-BU2, BU, FR-BU) is used (FR-F720-02330 (FR-F740-01160) or
lower)
⋅ Set Pr. 30 = "0 (initial setting), 10, 20, 100 or 120" for the FR-BU2 operation with GZG/GRZG/FR-BR, or the BU/FR-
BU operation. The Pr. 70 setting is invalid.
CAUTION
⋅ Do not operate the MT-BU5 type brake unit and FR-BU2 in parallel. Doing so could cause an alarm or brake unit failure. Use the
FR-BU2 only when performing parallel operation.
(2) When the FR-BU2 brake unit is used (in combination with MT-BR5) (FR-F720-03160 (FR-
F740-01800) or higher)
⋅ Set the following parameter to use FR-BU2 with MT-BR5.
Set "1, 11, 21, 101, or 121" in Pr. 30.
Set "0% (initial value)" in Pr. 70.
Set Pr. 0 Brake mode selection = "2" in the brake unit FR-BU2.
REMARKS
⋅ The stall prevention (overvoltage), oL, does not occur while Pr. 30 Regenerative function selection = "1, 11, 21, 101, or 121"
(3) When using a brake unit (MT-BU5) and power regeneration converter (MT-RC) (FR-F720-
03160 (FR-F740-01800) or higher)
⋅ Set "1, 11, 21, 101 or 121" in Pr. 30.
⋅ Set "10%" In Pr. 70 when using a brake unit (MT-BU5).
⋅ Set "0%" in Pr. 70 when using a power regeneration converter (MT-RC).
(4) When using the high power factor converter (FR-HC, MT-HC) or power regeneration
common converter (FR-CV)
⋅ Set "2" in Pr. 30. The Pr. 70 setting is invalid.
⋅ Use any of Pr. 178 to Pr. 189 (Input terminal function assignment) to assign the following signals to the contact input
terminals.
(a) X10 signal: FR-HC, MT-HC connection, FR-CV connection (inverter operation enable signal)
To make protective coordination with the FR-HC, MT-HC or FR-CV, use the inverter operation enable signal
to shut off the inverter output. Input the RDY signal of the FR-HC, MT-HC (RDYB signal of the FR-CV).
(b) X11 signal: FR-HC, MT-HC connection (instantaneous power failure detection signal)
When the setting has been made to hold the mode at occurrence of an instantaneous power failure for RS-
485 communication operation, use this signal to hold the mode. Input the Y1 or Y2 signal (instantaneous
power failure detection signal) of the FR-HC, MT-HC.
⋅ For the terminal used for X10 or X11 signal input, assign its function by setting "10" (X10) or "11" (X11) in any of Pr.
178 to Pr. 189.
REMARKS
⋅ When Pr. 30 = "2", "Err" is displayed on the operation panel as the inverter is reset by the setting.
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