Hitachi SJ-P1 Series - Write Single Register [06 H]

7-10
Chapter 7
About the Modbus TCP
7.2.8 Write single register [06h]
This function code is used to write a single holding
register.
[Request]
The request specifies the address of the register to
be written. Registers are addressed starting at
zero.
(Example)
Configure the register number "2F4Eh
(Multispeed-0 setting, 1st-motor)" to "50.00[Hz]".
[Response]
The normal response is an echo of the request,
returned after the register contents have been
written.
Hi: high order
Lo: low order
Configure the inveter parameter [AA101] to "07
(parameter setting)" in order to drive actually.
Address
Blocks
Items
Code
0
Modbus TCP
header part
Transaction ID (Hi)
15h
1
Transaction ID (Lo)
01h
2
Protocol ID (Hi)
00h
3
Protocol ID (Lo)
00h
4
Data size (Hi)
00h
In the case, 6 byte lengths
(address 6 through 11).
5
Data size (Lo)
06h
6
Unit ID
FFh
7
Modbus
data part
Function code
06h
8
Starting adderess (Hi)
2Fh
In the case, "2F4Dh"
("2F4Eh" minus 1).
9
Starting adderess (Lo)
4Dh
10
Register vaule (Hi)
13h
1388h→5000d
→50.00[Hz] (frequency)
11
Register value (Lo)
88h
Address
Blocks
Items
Code
0
Modbus TCP
header part
Transaction ID (Hi)
15h
1
Transaction ID (Lo)
01h
2
Protocol ID (Hi)
00h
3
Protocol ID (Lo)
00h
4
Data size (Hi)
00h
In the case, 6 byte lengths
(address 6 through 11).
5
Data size (Lo)
06h
6
Unit ID
FFh
7
Modbus
data part
Function code
06h
8
Starting adderess (Hi)
2Fh
In the case, "2F4Dh"
("2F4Eh" minus 1).
9
Starting adderess (Lo)
4Dh
10
Register vaule (Hi)
13h
1388h→5000d
→50.00[Hz] (frequency)
11
Register value (Lo)
88h