User manual for meter with U/I input PD72S
5. Read of the registers 1, 2 and 3 in one message (example of reading a number of
registries in one frame):
ADDR FUNC
REG H,L
COUNT H,L
CRC L,H
01
03
00
01
00
03
54
0B
COUNT L - the count of being read registers (max.16)
The answer:
ADDR
FUNC
BYTE C DATA H1,L1
DATA H2,L2
DATA H3,L3
CRC L,H
01
03
06
00
0A
00
00
00
01
78
B4
DATA H1, L1 - reg. 01h (10 -
displayed value “1.0”),
DATA H2, L2 - reg. 02h (0 - no errors),,
DATA H3, L3 - 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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