Write In Holding Registers [17H] - Hitachi WJ200 Series Instruction Manual

Write in Holding Registers [17h]:

This function is to read and write data in consecutive holding registers. An example
follows:
• Write "50.0Hz" as the set frequency (F001) in an inverter having a slave address "1"
and then to read out the output frequency (d001).
Query:
No. Field Name
1 Slave address *1
2 Function code
3 Start address to read *3
(high order)
4 Start address to read *3
(low order)
5 Number of holding
registers to read (high
order)
6 Number of holding
registers to read (low
order)
7 Start address to write
*3
(high order)
8 Start address to write
*3
(low order)
9 Number of holding
registers to write (high
order)
10 Number of holding
registers to write (low
order)
11 Byte number to write*2
12 Change data 1
(high order)
13 Change data 1
(low order)
14 Change data 2
(high order)
15 Change data 2
(low order)
16 CRC-16 (high order)
17 CRC-16 (low order)
Note 1: Register address value (transmitted on Modbus line) is 1 less than the
Register Number.
When writing in selected holding registers fails, see the exception response.
Response:
Example
No.
(Hex)
01 1 Slave address
17 2 Function code
10 3 Byte number n
00 4 Register Data 1 (high
order)
00 5 Register Data 1 (low
order)
02 6 Register Data 2 (high
order)
00 7 Register Data 2 (low
order)
00 8 CRC-16 (high order)
00 9 CRC-16 (low order)
02
04
00
00
13
88
F4
86
Example
Field Name
(Hex)
B−17
01
17
04
00
00
13
88
F4
71