Hitachi SJ700-4000HFU2

Chapter 4 Explanation of Functions
4-117
The commands are described below.
(i) 00 command: This command instructs the inverter to drive the motor (for forward or reverse rotation) or stop the
motor. (To use this command, set "A002" to "03" [RS485].)
- Transmission frame
Frame format
STX
Station No.
Command
Data
BCC
CR
Description
Data size
Setting
STX
Control code (Start of TeXt)
1 byte
STX (0x02)
Station No.
Station number of control-target
inverter
2 bytes
01 to 32, or FF (broadcast to all stations)
Command
Command to be transmitted
2 bytes
00
Data
Data to be transmitted
1 byte
See Note 1.
BCC
Block check code
2 bytes
XOR of the items from "Station No." to "Data." See
Item (3) of this section.
CR
Control code (Carriage Return)
1 byte
CR (0x0D)
Note 1:
Data
Description
Remarks
0
Stop command
1
Forward rotation command
2
Reverse rotation command
(Example) When sending a forward rotation command to the inverter with station No. 01:
(STX) |01|00|1| (BCC) | (CR) 02|30 31|30 30|31|33 30|0D
- Response frame
Positive response: See Item (2)-(i) of this section.
Negative response: See Item (2)-(ii) of this section.
(ii) 01 command: This command sets the inverter output frequency. (To use this command, set "A001" to "03"
[RS485].)
- Transmission frame
Frame format
STX
Station No.
Command
Data
BCC
CR
Description
Data size
Setting
STX
Control code (Start of TeXt)
1 byte
STX (0x02)
Station No.
Station number of control-target
inverter
2 bytes
01 to 32, or FF (broadcast to all stations)
Command
Command to be transmitted
2 bytes
01
Data
Data to be sent (decimal ASCII code)
6 bytes
See Note 2.
BCC
Block check code
2 bytes
XOR of the items from "Station No." to "Data." See
Item (3) of this section.
CR
Control code (Carriage Return)
1 byte
CR (0x0D)
Note 2: For example, to set the output frequency of the inverter with station No. 01 to 5 Hz, the data is as follows:
(STX) |01|01|000500| (BCC) | (CR) 02|30 31|30 31|30 30 30 35 30 30|30
35|0D
Note 3: The data indicates a value 100 times as large as the actual frequency value to be set.
(Example) 5 (Hz)  500  000500 30 30 30 35 30 30
Note 4: When using the data as the feedback data for PID control, set the most-significant byte to "1".
(Example) 5 (%)  500  100500 31 30 30 35 30 30
- Response frame
Positive response: See Item (2)-(i) of this section.
Negative response: See Item (2)-(ii) of this section.
Conversion into ASCII format
Conversion into ASCII format
Conversion into ASCII format
Conversion into ASCII format