Simex SPT-86L, User Manual

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User manual for RTD,TC,mV/4-20mA converter module SPT-86L
2. Read of device ID code
ADDR FUNC REG H,L COUNT H,L CRC L,H
01 03 00 21 00 01 D4 00
The answer:
ADDR FUNC BYTE C DATA H,L CRC L,H
01 03 02 20 5B E0 7F
DATA - identification code (205Bh)
3. Change of the device address from 1 to 2 (write to reg. 20h)
ADDR FUNC REG H,L DATA H,L CRC L,H
01 06 00 20 00 02 09 C1
DATA H - 0
DATA L - new device address (2)
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, 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 - measured 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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