11
5.2.4 Communication instruction
5.2.4.1 Read-write register contents
Modbus function code 03 (03H) and 04 (04H) can be used to access all contents of the address table, and
function code 16 (10H) can be used to write continuous register data.
Data
address
Data content
Data type
Read/
Write
Command
word
Data
Length(byte)
00
Meter identification code #
Fixed-point
number
R
03
、
04
2
01
Version
Fixed-point
number
R
03
、
04
2
02
Address(1
～
247)
Fixed-point
number
R/W
03
、
04/16
2
03
Communication baud rate(38400
、
19200
、
9600
、
4800
、
2400
、
1200)
Fixed-point
number
R/W
03
、
04/16
2
04
Communication verification mode (Note 1)
Fixed-point
number
R/W
03
、
04/16
2
05-11
Reserve
Fixed-point
number
R
03
、
04
2
12
Current status of remote control channel
(Note 2)
High 8-bit DI, low 8-bit DO,
Bit0 ~ BIT7 corresponds to DO1 ~ DO8
Bit8 ~ BIT15 corresponds to DI1 ~ DI8
Fixed-point
number
R/W
2
13-15
Reserve
Fixed-point
number
R
03
、
04
2
16
Current state of remote signaling channel
(Note 2)
Bit0 is the first channel of DI1, Bit1 is the
second channel of DI2, and so on
Fixed-point
number
R
03
、
04
2
17
Current status of remote control channel
(Note 2)
Bit0 is the first channel of DO1, Bit1 is the
second channel of DO2, and so on
Fixed-point
number
R/W
03
、
04/16
2
18
Remote signal channel debouncing
time(1
～
1000ms)
Fixed-point
number
R/W
03
、
04/16
2
19
Reserve
Fixed-point
number
R/W
03
、
04/16
2
20
Duration of digital output DO1 (Note 3)
Fixed-point
number
R/W
03
、
04/16
2
21
Digital output DO2 duration
Fixed-point
number
R/W
03
、
04/16
2
22
Digital output DO3 duration
Fixed-point
number
R/W
03
、
04/16
2
23
Digital output DO4 duration
Fixed-point
number
R/W
03
、
04/16
2
