Hitachi SJ300-037HFE 사용자 설명서

Communications Protocol

Append

ix

 B

The 04 command reads the status of the inverter. 
The frame format of command 04 follows the 
diagrams and specification tables. The transmit 
frame has no data field.

The receive frame has an 8-byte data field, 
containing values for three trip items (plus a 
reserved field).

Trip data is organized as shown. The 
table below lists the codes and their 
meanings.

STX

Control code (STart of TeXt)

1 byte

STX (0x02)

Node

Node (station) address of inverter

2 bytes 01 to 32

Command

Transmission command

2 bytes 04

BCC

Block check sum code

2 bytes Exclusive OR of Node, 

Command, and Data

[CR]

Control code (carriage return)

1 byte

[CR] (0x0D)

STX

Control code (STart of TeXt)

1 byte

STX (0x02)

Node

Node (station) address of inverter

2 bytes 01 to 32

Data

Transmission data

8 bytes (see next table)

BCC

Block check sum code

2 bytes Exclusive OR of Node, 

Command, and Data

[CR]

Control code (carriage return)

1 byte

[CR] (0x0D)

00

Initial status

On stopping

—

01

—

On running

Stop

02

On Stopping

On tripping

Deceleration speed

03

On running

—

Constant speed

04

On free-run stop

—

Acceleration speed

05

On jog

—

Forward

06

On dynamic braking

—

Reverse

07

On retry

—

Reverse from forward

08

On trip

—

Forward from reverse

09

On under-voltage

—

Forward start

10

—

—

Reverse start

STX Node

Command

BCC [CR]

Transmit frame format

STX Node

Data

BCC [CR]

Receive frame format

Data field contents

(reserved)

Status C

Status B

Status A