Selection Of A Regenerative Brake (Pr. 30, Pr.70) - Mitsubishi Electric F700 Instruction Manual

3.8.2

Selection of a regenerative brake (Pr. 30, Pr.70)

Use the "high power factor converter (FR-HC, MT-HC) to reduce harmonics, improve the power factor, or
continuously use the regenerative mode.
Parameter
Name
Number
30
Regenerative function selection
70 Special regenerative brake duty
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 140)
(1) When the brake unit (BU, FR-BU) is used
⋅ Set "0" (initial value) in Pr. 30. The Pr. 70 setting is made invalid.
(2) When using a brake unit (MT-BU5) and power regeneration converter (MT-RC) (01800 or
more)
⋅ Set "1" 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).
(3) 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 made 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) to any of
Pr. 178 to Pr. 189.
REMARKS
⋅ The MRS signal can also be used instead of the X10 signal. (Refer to page 85.)
⋅ Refer to pages 18 to 20 for the connection of the brake unit, high power factor converter (FR-HC, MT-HC) and power
regeneration common converter (FR-CV).
CAUTION
⋅ Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions.
Please make setting after confirming the function of each terminal.
♦ Parameters referred to ♦
Pr. 178 to Pr.189 (input terminal function selection)
Initial Value Setting Range
0
0 1
2
0% 0 to 10%
Refer to page 85
Motor brake and stop operation
Description
Brake unit
Brake unit (MT-BU5), power
regeneration converter (MT-RC)
(Setting can be made only for the
01800 or more)
High power factor converter
Set the %ED of the brake transistor
operation when using a brake unit
(MT-BU5).
(Setting can be made only for the
01800 or more)
Pr. 29 Pr. 29
page 77 page 77
Pr.31 Pr.31
page 63 page 63
Pr. 69
page 114
Pr. 71
page 80
3
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