Mitsubishi Electric FR-A700 Series Technical Manual Download

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332

PARAMETER

(1) When using a built-in brake resistor

Set [

Pr. 30

= 0, 10, 20]. The [

Pr. 70

] setting is invalid.

At this time, the regenerative brake duty is as follows.
(The built-in brake resistor is provided for the 7.5K or
less.)

(2) When using brake resistor (MRS

type)

Set [

Pr. 30

= 0]. [

Pr. 70

] setting becomes invalid.

At this time, the regenerative brake duty is as follows.

(3) When using brake resistor (MYS type)

MYS type brake resistor is available for 200V class
3.7K. At this time, set [

Pr. 30

= 1], [

Pr. 70

= 6%].

(4) When using the high-duty brake resistor

(FR-ABR) (22K or less)

Set [

Pr. 30

= 1, 11, 21].

Set [

Pr. 70

] as follows.

(5) When the brake unit (FR-BU2, BU, FR-BU)

is used.

Set [

Pr. 30

= 0, 10, 20]. The [

Pr. 70

] setting is invalid.

(6) When using the brake unit (MT-BU5) or

power regeneration converter (MT-RC)

(75K or more)

Set [

Pr. 30

= 1, 11, 21].

Set [

Pr. 70

= 10%] when using the brake unit (MT-BU5).

Set [

Pr. 70

= 0%] when using the regeneration

converter (MT-RC).

(7) When using the high power factor

converter (FR-HC, MT-HC) or power
regeneration common converter (FR-CV)

Set [

Pr. 30

= 2]. The [

Pr. 70

] setting is invalid.

Also built-in brake transistor is invalid.
Changing the setting to [

Pr. 30

= 2] causes inverter

reset and "Err" to be displayed on the operation
panel.
Use any of [

Pr. 178 to 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 the X10, X11 signal input,
set 10 and 11 in any of [

Pr. 178 to 189

] to assign the

function.

(8) When using power regeneration common

converter (FR-CV), high power factor

converter (FR-HC)

Set [

Pr. 30

= 0]. [

Pr. 70

] setting is invalid. Assign

inverter operation enable signal (X10) to contact
input terminal. Shut off the inverter output by the
inverter operation enable signal (X10) to make
protective coordination with FR-HC and FR-CV.
Input RDY signal of FR-HC (RDYB signal of FR-CV).
For the terminal to input X10 signal, assign the
function by setting "10 (X10)" to any of [

Pr. 178 to 184

Input terminal function selection

(9) When automatic restart after

instantaneous power failure function is
valid while using high power factor
converter (FR-HC)

When automatic restart after instantaneous power
failure is valid [

Pr. 57 Restart coasting time

≠

9999] in

FR-HC and inverter, set [

Pr. 30

= 2].

Set [

Pr. 70

= 0% (initial value)].

RDY signal turns ON if FR-HC detects power failure
during inverter operation, and motor coasts. If RDY
signal is turned OFF after power is restored, inverter
detects motor speed (depending on the [

Pr.162

Automatic restart after instantaneous power failure
selection

] setting) and restarts after instantaneous

power failure. Changing the setting to [

Pr. 30

= 2]

causes inverter reset and "Err" to be displayed on the
operation panel.

Inverter type

Duty

FR-A720-0.4K to 3.7K

FR-A720-5.5K and 7.5K

FR-A740-0.4K to 7.5K