Hitachi SJ Series User Manual page 505

Chapter 14
14.4.4 Writing to retention register [06h]
• Perform a writing to the specified retention register.
(Example)
To write 50Hz as the 0 speed command [Ab110] to the
inverter with slave address 1.
Query
Field Name
1 Slave address *1)
2 Function code
3 Register starting No. (high)
4 Register starting No. (low)
5 Data to be changed (high)
6 Data to be changed (low)
7 CRC-16 (high)
8 CRC-16 (low)
!
*1) When a broadcasting is performed, a response is not
returned.
A
• When a writing to a retention register cannot be executed
normally, see "3.9 Exceptional Responses".
• In order to set 50Hz, set the data to be changed to "5000
(1388h) because the data resolution of retention register
"2F4Eh" for 0 speed command [Ab110] is 0.01Hz.
Response
Example (HEX)
01
06
2F
4D
13
88
1C
5F
*3) Note that the starting address of [Ab110] retention
14-14
RS485 Communication
Field Name
1 Slave address
2 Function code
3 Register starting No. (high)
4 Register starting No. (low)
5 Data to be changed (high)
6 Data to be changed (low)
7 CRC-16 (high)
8 CRC-16 (low)
register is "2F4Dh", which is one less than the register
No. "2F4Eh". The value obtained by subtracting one
from the register No. is the register address.
Example (HEX)
01
06
2F
4D
13
88
1C
5F