Справочник Пользователя для Hitachi SJ300-037HFE
Communications Protocol
Append
ix
B
B–8
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.
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.
Command – 03
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.
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.
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
+ 0x0000000000000008
= 0x000000000000000D
Sum the three data strings:
Element
Description
Size
Value
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)
Element
Description
Size
Value
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
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