14-14
Chapter 14
RS485 Communication
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
Example (HEX)
1
Slave address *1)
01
2
Function code
06
3
Register starting No. (high)
2F
4
Register starting No. (low)
4D
5
Data to be changed (high)
13
6
Data to be changed (low)
88
7
CRC-16 (high)
1C
8
CRC-16 (low)
5F
*1)
When a broadcasting is performed, a response is not
returned.
• 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
Field Name
Example (HEX)
1
Slave address
01
2
Function code
06
3
Register starting No. (high)
2F
4
Register starting No. (low)
4D
5
Data to be changed (high)
13
6
Data to be changed (low)
88
7
CRC-16 (high)
1C
8
CRC-16 (low)
5F
*3)
Note that the starting address of [Ab110] retention
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.
!
A
Содержание SJ Series
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