User manual for - TEMPERATURE TRANSDUCER TRS-02a
The answer (the same as the message):
ADDR
FUNC
REG H,L
DATA H,L
CRC L,H
01
06
00
20
00
02
09
C1
4. Read of the registers 1 and 2 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
02
95
CB
COUNT L - the count of being read registers (max. 5)
a) The answer (we assume that input signal is not out of range):
ADDR
FUNC
BYTE C DATA H1,L1
DATA H2,L2
CRC L,H
01
03
04
00
C1
00
00
AB
CF
DATA H1, L1 - reg. 01h (193 - measurement value 19.3
°C
),
DATA H2, L2 - reg. 02h (0 - no errors),
b) The answer (if an error occur):
ADDR
FUNC
BYTE C DATA H1,L1
DATA H2,L2
CRC L,H
01
03
04
00
C5
00
A0
EA
76
DATA H1, L1 - reg. 01h (197 - last correct measurement value 19.7
°C
),
DATA H2, L2 - reg. 02h (A0h - PT-100 line broken/opened
)
There is no full implementation of the Modbus Protocol in the device. The
functions presented above are available only.
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