Mitsubishi Electric FR-A720-0.4K Specifications download pdf (Page 50)

When setting parameters, refer to the instruction manual (applied) and understand instructions.

⋅ On the assumption that the Pr.849 setting 100% as 0, the

offset voltage is offset as follows:

100%<Pr.849...positive side

100%>Pr.849...negative side

The offset voltage is found by the following formula.

You can select the reset input acceptance, disconnected PU (FR-

DU07/FR-PU04/FR-PU07) connector detection function and PU

stop function.

 Reset selection

⋅

You can select the operation timing of reset function (RES

signal, reset command through communication) input.

 Disconnected PU detection

⋅

This function detects that the PU (FR-DU07/FR-PU04/FR-

PU07) has been disconnected from the inverter for longer

than 1s and causes the inverter to provide an alarm output

(E.PUE) and come to an alarm stop.

 PU stop selection

⋅

In any of the PU operation, external operation and network

operation modes, the motor can be stopped by

pressing of the PU.

At alarm occurrence, its description can be output as a 4-bit digital

signal from the open collector output terminals.

The alarm code can be read by a programmable controller, etc.,

and its corrective action can be shown on a display, etc.

 The following table indicates alarm codes to be output.

(0: output transistor off, 1: output transistor on)

You can select whether write to various parameters can be

performed or not. Use this function to prevent parameter values

from being rewritten by misoperation.

This function can prevent reverse rotation fault resulting from the

incorrect input of the start signal.

Offset voltage =

Voltage at 100%

(according to the

Pr.73

setting)

Pr.849

-100

[V]

100

Reset selection, disconnected PU detection

Pr.75 Reset selection/disconnected PU detection/PU stop selection

Pr.75

Setting

Reset Selection

Disconnected PU

Detection

PU Stop Selection

Reset input normally

enabled

If the PU is

disconnected,

operation will be

continued as-is.

Pressing

decelerates the motor

to a stop only in the PU

operation mode.

Reset input enabled only

when the protective

function is activated

Reset input normally

enabled

When the PU is

disconnected, the

inverter output is shut

off.

Reset input enabled only

when the protective

function is activated

(initial

value)

Reset input normally

enabled

If the PU is

disconnected,

operation will be

continued as-is.

Pressing

decelerates the motor

to a stop in any of the

PU, external and

communication

operation modes.

Reset input enabled only

when the protective

function is activated

Reset input normally

enabled

When the PU is

disconnected, the

inverter output is shut

off.

Reset input enabled only

when the protective

function is activated

0% 100%

(10V or 5V)

Pr.849 setting

Frequency

command

Speed setting

signal

Slope determined

according to Pr.125

and C2 to C4

Slope does not

change.

0% 200%100%

Pr.

Output function of alarm code

Pr.76 Alarm code output selection

Pr.76 Setting Description

0 (initial value)

Without alarm code output

With alarm code output (refer to the table below)

Alarm code output at alarm occurrence only (refer to the table

below)

Operation Panel

Indication

(FR-DU07)

Output of Output Terminals

Alarm Code

SU IPF OL FU

Normal*

0 0 0 0 0

E.OC1

0 0 0 1 1

E.OC2

0 0 1 0 2

E.OC3

0 0 1 1 3

E.OV1 to

E.OV3

0 1 0 0 4

E.THM

0 1 0 1 5

E.THT

0 1 1 0 6

E.IPF

0 1 1 1 7

E.UVT

1 0 0 0 8

E.FIN

1 0 0 1 9

E.BE

1 0 1 0 A

E. GF

1 0 1 1 B

E.OHT

1 1 0 0 C

E.OLT

1 1 0 1 D

E.OPT

1 1 1 0 E

E.OP3

1 1 1 0 E

Other than the

above

1 1 1 1 F

* When Pr.76 = "2", the output terminals output the signals assigned to Pr.190 to Pr.196

Prevention of parameter rewrite

Pr.77 Parameter write selection

Pr. 77 Setting Description

0 (initial value)

Write is enabled only during a stop.

Parameter write is not enabled.

Parameter write is enabled in any operation mode regardless of

operation status.

Prevention of reverse rotation of the motor

Pr.78 Reverse rotation prevention selection

Pr.78 Setting Description

0 (initial value)

Both forward and reverse rotations allowed

Reverse rotation disabled

Forward rotation disallowed

Pr.

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 102 103

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Mitsubishi Electric FR-A720-0.4K Specifications Page 50

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