Hitachi SJ300-037HFE 사용자 설명서

Communications Protocol

Append

ix

 B

The 00 command controls the Forward, Reverse and Stop mode of the inverter. You must set 
parameter A002=03 in order for serial communications control of the inverter to apply.

The frame format of command 00 follows the 
timing diagram and specification table.

The example below shows a transmission to the inverter at address Node 1 to rotate the motor 
in the forward direction.

The 01 command sets the output frequency for the standard profile. You must set parameter 
A002=03 in order for serial communications control of the inverter to apply.

The frame format of command 01 follows the 
timing diagram and specification table.

The example below shows a transmission to the inverter at address Node 1 to set the output 
frequency for 5 Hz. We use a value of 500 in ASCII to represent 5.00 Hz.

STX

Control code (STart of TeXt)

1 byte

STX (0x02)

Node

Node (station) address of inverter

2 bytes 01 to 32, and FF (broadcast to all 

nodes)

Command

Transmission command

2 bytes 00

Data

Transmission data

1 byte

00 = Stop command
01 = Forward command
02 = Reverse command

BCC

Block check sum code

2 bytes Exclusive OR of Node, 

Command, and Data

[CR]

Control code (carriage return)

1 byte

[CR] (0x0D)

STX Node

Command

Data

BCC [CR]

Frame format

(STX) | 01 | 00 | 1 | (BCC) | [CR]

to ASCII

02 | 30 31 | 30 30 | 31 | 33 30 | 0D

STX

Control code (STart of TeXt)

1 byte

STX (0x02)

Node

Node (station) address of inverter

2 bytes 01 to 32, and FF (broadcast to all 

nodes)

Command

Transmission command

2 bytes 01

Data

Transmission data

6 bytes ASCII code for ten times the 

frequency (accommodates two 
decimal places)

BCC

Block check sum code

2 bytes Exclusive OR of Node, 

Command, and Data

[CR]

Control code (carriage return)

1 byte

[CR] (0x0D)

STX Node

Command

Data

BCC [CR]

Frame format

(STX) | 01 | 01 | 000500 | (BCC) | [CR]

to ASCII

02 | 30 31 | 30 31 | 30 30 30 35 30 30 | 30 35 | 0D