Carbon Monoxide Transmitter Modbus
Installation Manual
May 5, 2017
IN-CMD5B4MOD-01-01 Page 24
0x03 --- Read Temperature °C / °F
Query
0x3A
Slave address
0x01 to 0xFF
MSB
Slave address
0x01 to 0xFF
LSB
0x30 0x33 0x30 0x30 0x30
0x32
0x30
0x30
0x30
0x31
LRC MSB
LRC LSB
0x0D
0x0A
Response
0x3A
Slave address
0x01 to 0xFF
MSB
Slave address
0x01 to 0xFF
LSB
0x30 0x33 0x30 0x32
Register value
MSB (PPM)
Register value
(PPM)
Register value
(PPM)
Register value
LSB (PPM)
LRC
MSB
LRC
LSB
0x0D 0x0A
0x03 --- Read Buzzer Status
Query
0x3A
Slave address
0x01 to 0xFF
MSB
Slave address
0x01 to 0xFF
LSB
0x30 0x33 0x30 0x30 0x30
0x33
0x30
0x30
0x30
0x31
LRC MSB
LRC LSB
0x0D
0x0A
Response
0x3A
Slave address
0x01 to 0xFF
MSB
Slave address
0x01 to 0xFF
LSB
0x30 0x33 0x30 0x32
0x30 0x30 0x30
0x30 (buzzer not activated)
0x31 (buzzer activated)
LRC
MSB
LRC
LSB
0x0D 0x0A
0x03 --- Read Relay 1 Status
Query
0x3A
Slave address
0x01 to 0xFF
MSB
Slave address
0x01 to 0xFF
LSB
0x30 0x33 0x30 0x30 0x30 0x34
0x30
0x30
0x30
0x31
LRC MSB
LRC LSB
0x0D
0x0A
Response
0x3A
Slave address
0x01 to 0xFF
MSB
Slave address
0x01 to 0xFF
LSB
0x30 0x33 0x30 0x32
0x30 0x30 0x30
0x30 (relay 1 not activated)
0x31 (relay 1 activated)
LRC
MSB
LRC
LSB
0x0D 0x0A