Hitachi SJ Series, User Manual

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14-17
Chapter 14 RS485 Communication
14.4.7 Writing to multiple registers [10h]
• Rewrite consecutive multiple registers.
(Example)
To set acceleration time [FA-10] for the inverter with slave
address 1 to 3,000 seconds.
Query
Field Name Example (HEX)
1 Slave address *1) 01
2 Function code 10
3 Starting address (high) *2) 2B
4 Starting address (low) *2) 01
5
The number of retention
registers (high) 00
6
The number of retention
registers (low) 02
7 Bytes *3) 04
8 Data to be changed 1 (high) 00
9 Data to be changed 1 (low) 04
10 Data to be changed 2 (high) 93
11 Data to be changed 2 (low) E0
12 CRC-16 (high) 9E
13 CRC-16 (low) 9F
*1) When a broadcasting is performed, a response is not
returned.
*2) Note that the value of starting address is one less than
the actual address.
*3) Specify the number of bytes to be actually changed
instead of the number of retention registers.
• When a writing to multiple coils cannot be executed
normally, see “14.3.9 Exceptional Responses”.
• In order to set 3,000 seconds, set the data to be changed
to “300,000 (493E0h)” because the data resolution of
retention registers “2B02h, 2B03h” for acceleration time
[FA-10] is 0.01 seconds.
Response
Field Name Example (HEX)
1
Slave address 01
2
Function code 10
3
Starting address (high) 2B
4
Starting address (low) 01
5
The number of retention
registers (high) 00
6
The number of retention
registers (low) 02
7
CRC-16 (high) E5
8
CRC-16 (low) 34
!
A