Hitachi SJ300-037HFE 사용자 설명서

Communications Protocol

Append

ix

 B

The arrangement of the terminal assignment data permits you to assign all inputs in a single 
command. The example below shows a transmission to the inverter at address Node 1 to set the 
Forward command, Multi-speed 1 and Multi-speed 2.

The 03 command reads the monitor data as a single block.

The frame format of command 03 follows the 
diagram and specification table. The transmit 
frame has no data field.

The receive frame has a 104-byte data field, 
containing values for 13 items.

(STX) | 01 | 02 | 0x000000000000000D | (BCC) | (CR) 

to ASCII

02 | 30 31 | 30 31 | 30 30 30  30  30 30 30  30  30 30 30  30  30 30 30  68 | 30 35 | 0D

0x0000000000000001

+ 0x0000000000000004
+ 0x0000000000000008

= 0x000000000000000D

Sum the three data strings:

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 03

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

104 
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)

STX Node

Command

BCC [CR]

Transmit frame format

STX Node

Data

BCC [CR]

Receive frame format