Frame Format: Read Input Registers - Uponor Smatrix Base PRO X-148 Installation Manual

Request example:Read heating/cooling offset temperature
Slave address Function code
(0x01) (0x03)
1 byte 1 byte
Response example:Read heating/cooling offset temperature
Slave address Function code
(0x01) (0x03)
1 byte 1 byte

2.4 Frame format: Read Input Registers

Request
Slave address Function code
(0x01 – 0xF7) (0x04)
1 byte 1 byte
Response
Slave address Function code
(0x01 – 0xF7) (0x04)
1 byte 1 byte
Response in case of error
Slave address Error code
(0x01 – 0xF7) (0x84)
1 byte 1 byte
Example:
Request example:Read room temperature data (21.0 ˚C / 69.8 ˚F = value 689, 0x02BA) for all zones
Slave address Function code
(0x01) (0x04)
1 byte 1 byte
Response example:Read room temperature data (21.0 ˚C / 69.8 ˚F = value 689, 0x02BA) for all zones
Slave address Function code
(0x01) (0x04)
1 byte 1 byte
Starting register Starting register
address HI address LO
(0x00) Start at 73 (0x48)
1 byte 1 byte
Byte count Holding register HI
(0x02) (0x02)
1 byte 1 byte
Starting register address
(0x0000 – 0xFFFF)
2 bytes
Byte count
(2*N) N = quantity of registers
1 byte
Exception code
(01, 02, 03, 04, or 06)
1 byte
Starting register Starting register
address HI address LO
(0x00) Start at 2 (0x01)
1 byte 1 byte
Byte count Input register
HI (channel 1)
(0x18)
(0x02)
1 byte 1 byte
Uponor Smatrix Base PRO Controller X-148 Modbus RTU
Quantity of holding
registers to read HI
(0x00)
1 byte
Holding register LO
2 °C (0x24)
1 byte
Quantity of holding registers to read
(0x0001 – 0x007D)
2 bytes
Input register
2*N bytes
Quantity of input
registers to read HI
(0x00)
1 byte
Input register ... Input register
LO (channel 1) HI (channel
12)
(0xBA)
(0x02)
1 byte ... 1 byte
Quantity of holding CRC
registers to read LO
(0x01)
1 byte 2 bytes
CRC
2 bytes
CRC
2 bytes
CRC
2 bytes
CRC
2 bytes
Quantity of input CRC
registers to read LO
12 channels (0x0C)
1 byte 2 bytes
Input register CRC
LO (channel
12)
(0xBA)
1 byte 2 bytes
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