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Uponor Smatrix Base PRO Controller X-147 Modbus RTU interface l Installation manual l 9
Request example: Read comfort setting, channel 12
Slave address
(0x01)
Function code
(0x03)
Starting register
address HI
(0x00)
Starting register
address LO
Start at 72 (0x47)
Quantity of holding
registers to read HI
(0x00)
Quantity of holding
registers to read LO
1 channel (0x01)
CRC
1 byte
1 byte
1 byte
1 byte
1 byte
1 byte
2 bytes
Response example: Read comfort setting, channel 12
Slave address
(0x01)
Function code
(0x03)
Byte count
(0x02)
Holding register HI
(0x00)
Holding register LO
Off (0x00)
CRC
1 byte
1 byte
1 byte
1 bytes
1 bytes
2 bytes
Request example: Read heating/cooling offset temperature
Slave address
(0x01)
Function code
(0x03)
Starting register
address HI
(0x00)
Starting register
address LO
Start at 73 (0x48)
Quantity of holding
registers to read HI
(0x00)
Quantity of holding
registers to read LO
(0x01)
CRC
1 byte
1 byte
1 byte
1 byte
1 byte
1 byte
2 bytes
Response example: Read heating/cooling offset temperature
Slave address
(0x01)
Function code
(0x03)
Byte count
(0x02)
Holding register HI
(0x00)
Holding register LO
2 °C (0x24)
CRC
1 byte
1 byte
1 byte
1 bytes
1 bytes
2 bytes