5
b) Active wet contact connection diagram:
5.1.4
Communication instructions
5.1.4.1
Read and 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 types
Read/
Write
Comman
d word
Data
length(byte)
Write to
allow
operating
ports
00
Meter identification code #
Fixed-poin
t number
R
03
、
04
2
01
Version number
Fixed-poin
t number
R
03
、
04
2
02
Address number
Fixed-poin
t number
R/W
03
、
04/16 2
COMM2
03
Communication baud rate
Fixed-poin
t number
R/W
03
、
04/16 2
COMM2
04
Communication check mode
Fixed-poin
t number
R/W
03
、
04/16 2
COMM2
05
Clock setting seconds, minutes
(BCD code)
Fixed-poin
t number
R/W
03
、
04/16 2
COMM2
06
Clock setting hours, days
(BCD code)
Fixed-poin
t number
R/W
03
、
04/16 2
COMM2
