Hitachi SJ-P1 Series - Write Multiple Registers [10 H]

7-14
Chapter 7
About the Modbus TCP
7.2.11 Write multiple registers [10h]
This function code is used to write a block of
contiguous registers.
[Request]
The requested written values are specified in the
request data field.
(Example)
Configure the register number "2B02h (FA-10:
acceleration time monitor)" to 10.00[s].
*1) Configure the number of bytes to actually
change, not the number of hold registers.
[Response]
The normal response returns the function code,
starting address, and quantity of registers written.
Hi: high order
Lo: low order
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)
0Bh
6
Unit ID
FFh
7
Modbus
data part
Function code
10h
8
Starting adderess (Hi)
2Bh
In the case, "2B01h"
("2B02h" minus 1).
9
Starting adderess (Lo)
01h
10
Quantity register (Hi)
00h
11
Quantity register (Lo)
02h
12
Byte count *1)
04h
13
Register value 1 (Hi)
00h
0000 03E8h→1000d
→10.00[s]
14
Register value 1 (Lo)
00h
15
Register value 2 (Hi)
03h
16
Register value 2 (Lo)
E8h
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
10h
8
Starting adderess (Hi)
2Bh
9
Starting adderess (Lo)
01h
10
Quantity register (Hi)
00h
11
Quantity register (Lo)
02h