Mitsubishi Electric FR-A720-0.4K Specifications download pdf (Page 53)

Features

Standard

Specifications

Outline

Dimension

Drawings

Operation

Panel

Protective

Functions

OptionsInstructionsMotorCompatibilityWarrantyInquiry

Terminal Connection

Diagram

Terminal Specification

Explanation

Parameter

List

Explanations

Parameters

Peripheral

Devices

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

When online auto tuning is selected, excellent torque accuracy is provided

by temperature compensation even if the secondary resistance value of

the motor varies with the rise of the motor temperature.

Select magnetic flux observer when performing vector control.

* Only Pr.95 can be set.

⋅ Perform offline auto tuning before performing start-time tuning of the

online auto tuning. Data needs to be calculated.

⋅ For using start-time tuning in elevator, examine the utilization of a

brake sequence for the brake opening timing at a start. Though the

tuning ends in about a maximum of 500ms after a start, torque is not

provided fully during that period. Therefore, note that there may be a

possibility of drop due to gravity.

⋅ For the SF-V5RU, SF-JR (with encoder) or SF-HRCA (with

encoder), it is not necessary to perform offline auto tuning to select

adaptive magnetic flux observer. (However

, perform offline auto

tuning when the wiring length is long.)

A dedicated V/F pattern can be made by freely setting the V/F

characteristic between a startup and the base frequency and base

voltage under V/F control (frequency voltage/frequency).

The torque pattern that is optimum for the machine's characteristic

can be set.

 Set "2" in Pr.71 and voltage and frequency in Pr.100 to Pr.109 .

 When frequency values at each point are the same, write disable

error ( ) appears. Set frequency and voltage within the range of

Pr.3 Base frequency and Pr.19 Base frequency voltage .

⋅ When Pr.19 Base frequency voltage ="8888" or "9999", Pr.71 cannot be

set to "2". When setting "2" in Pr.71, set the rated voltage value in

Pr.19.

(1) Initial settings and specifications of RS-485

communication (Pr.117 to Pr.124, Pr.331 to Pr.337,

Pr.341)

Used to perform required settings for RS-485 communication

between the inverter and personal computer.

 There are two different communications: communication

using the PU connector of the inverter and communication

using the RS-485 terminals.

 You can perform parameter setting, monitoring, etc. using

the Mitsubishi inverter protocol or Modbus-RTU protocol.

 To make communication between the personal computer

and inverter, initialization of the communication

specifications must be made to the inverter.

Data communication cannot be made if the initial settings

are not made or there is any setting error.

*1 When making communication through Modbus-RTU protocol with the

RS-485 terminals, the setting range of Pr.331 within parenthesis is

applied.

*2 The values in parenthesis are added to the setting range of Pr.332.

Online auto tuning

Pr.95 Online auto tuning selection Pr.574

Second motor online auto tuning

Pr.95, Pr.574 Setting Description

0 (initial value)

Online auto tuning is not performed

Start-time tuning (at start-up)

Magnetic flux observer (normal)

Refer to the section about Pr. 82.

Adjustable 5 points V/F

Pr.100 V/F1(first frequency) Pr.101 V/F1(first frequency voltage)

Pr.102 V/F2(second frequency) Pr.103 V/F2(second frequency voltage)

Pr.104 V/F3(third frequency) Pr.105 V/F3(third frequency voltage)

Pr.106 V/F4(fourth frequency) Pr.107 V/F4(fourth frequency voltage)

Pr.108 V/F5(fifth frequency) Pr.109 V/F5(fifth frequency voltage)

110, 111

Refer to the section about Pr.7.

112

Refer to the section about Pr.0.

113

Refer to the section about Pr.3.

114, 115

Refer to the section about Pr.22.

116

Refer to the section about Pr.41.

Pr.

95, 574

Magnetic flux

Sensorless

Vector

Pr.

100 to 109

V/F

ase frequency

voltage

Pr.19

Base frequency

Pr.3

Torque boost

Pr.0

V/F Characteristic

V/F5

V/F4

V/F3

V/F2

V/F1

Frequency

Voltage

Pr.

Communication initial setting

Pr.117 PU communication station number

Pr.118 PU communication speed

Pr.119

PU communication stop bit length

Pr.120 PU communication parity check

Pr.121

Number of PU communication retries

Pr.122

PU communication check time interval

Pr.123 PU communication waiting time setting

Pr.124 PU communication CR/LF presence/absence selection

Pr.331 RS-485 communication station number

Pr.332 RS-485 communication speed

Pr.333

RS-485 communication stop bit length

Pr.334

RS-485 communication parity check selection

Pr.335

RS-485 communication retry count

Pr.336

RS-485 communication check time interval

Pr.337

RS-485 communication waiting time setting

Pr.341

RS-485 communication CR/LF selection

Pr.342

Communication EEPROM write selection

Pr.343

Communication error count

Pr.549 Protocol selection

Pr.

Number

Setting Range Description

117

331

0 to 31

(0 to 247)

Specify the inverter station number.

Set the inverter station numbers when two or

more inverters are connected to one personal

computer.

118

332

48, 96, 192, 384

(3, 6, 12, 24)

Set the communication speed.

The setting value × 100 equals the

communication speed.

For example, the communication speed is

19200bps when the setting value is 192.

119

333

Stop bit length Data length

0 1bit

8bit

1 (initial value) 2bit

10 1bit

7bit

11 2bit

120

334

Without parity check

With odd parity check

2 (initial value)

With even parity check

121

335

0 to10

Set the permissible number of retries at

occurrence of a data receive error. If the

number of consecutive errors exceeds the

permissible value, the inverter will come to an

alarm stop.

9999

If a communication error occurs, the inverter

will not come to an alarm stop.

122

336

No PU connector communication

Communication with RS-485 terminals can be

made, but the inverter will come to an alarm

stop in the NET operation mode.

0.1 to 999.8s

Set the interval of communication check time.

If a no-communication state persists for longer

than the permissible time, the inverter will

come to an alarm stop.

9999 (initial value)

No communication check

123

337

0 to 150ms

Set the waiting time between data

transmission to the inverter and response.

9999 (initial value)

Set with communication data.

124

341

Without CR/LF

1 (initial value)

With CR

With CR/LF

Pr.

117 to 124, 331 to 337, 341 to 343, 549

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 102 103

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Mitsubishi Electric FR-A720-0.4K Specifications Page 53

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