Hitachi WJ200-001S Instruction Manual page 542

Ex 3 A case where data range includes minus value. Ex 3
Ex 3 Ex 3
(Suppose the multiplication of external register and internal register is the same)
* * * * Below setting must be entered from the operator before Modbus communication, with power cycle.
External register
number
4003h
Pulse train frequency bias
When the value of
(1) Reading out Holding Register 03h] 、 T arget Register ： E xternal Register
Query:
No
1 Slave address
2 Function code
3 Register start address (high order)
4 Register start address (low order)
5 Number of holding registers (high order)
6 Number of holding registers (low order)
7 CRC-16 (high order)
8 CRC-16 (low order)
Response:
No Field Name
1 Slave address
2 Function code
3 Data size (in bytes)
4 Register data 1 (high order)
5 Register data 1 (low order)
6 CRC-16 (high order)
7 CRC-16 (low order)
Internal register
number
163Bh （ P 057 ）
＝ - 10 （ R ange of P057 ： - 100 to +100% ）
Field Name
Example
(Hex)
scaling
1.000
Example
(Hex)
01
03
Register address value
40
= Register
02
Number - 1
00
One register
01
30
0A
01
03
02
FF FFF6h represents -10 in two's
compliment
F6
79
F2
Ver.3− − − − 33
Format
Signed