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User manual for - METER WW-30
5. Read of the registers 1, 2 and 3 in one message (example of reading a number of
registries in one frame):
ADDR
FUNC
01
03
REG H,L
00
COUNT L
COUNT H,L
01
00
03
CRC L,H
54
0B
- the count of being read registers (max.16)
The answer:
ADDR
FUNC
01
03
DATA H1, L1
DATA H2, L2
DATA H3, L3
i
BYTE C DATA H1,L1
06
00
0A
DATA H2,L2
00
00
DATA H3,L3
00
01
CRC L,H
78
B4
- reg. 01h (10 - displayed value ”1.0”),
- reg. 02h (0 - no errors),,
- reg. 03h (1 - decimal point position ” 0.0”).
There is no full implementation of the Modbus Protocol in the device. The
functions presented above are available only.
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