Carbon Monoxide Transmitter Modbus
Installation Manual
May 5, 2017
IN-CMD5B4MOD-01-01 Page 17
0x03 --- Read Relay 2 Status
Query
Slave address
(0x01 to 0xFF)
0x03 0x00 0x05 0x00 0x01
CRC
LSB
CRC
MSB
Response
Slave address
(0x01 to 0xFF)
0x03 0x02
Register value
0x00
Register value
LSB
CRC
LSB
CRC
MSB
* Register value = 0x0000 = relay 2 not activated, 0x0001 = relay 2 activated
0x03 --- Read Test Mode Status
Query
Slave address
(0x01 to 0xFF)
0x03 0x00 0x06 0x00 0x01
CRC
LSB
CRC
MSB
Response
Slave address
(0x01 to 0xFF)
0x03 0x02
Register value
0x00
Register value
LSB
CRC
LSB
CRC
MSB
* Register value = 0x0000 = test mode not activated, 0x0001 = test mode activated
0x03 --- Read Fault Mode Status
Query
Slave address
(0x01 to 0xFF)
0x03 0x00 0x07 0x00 0x01
CRC
LSB
CRC
MSB
Response
Slave address
(0x01 to 0xFF)
0x03 0x02
Register value
0x00
Register value
LSB
CRC
LSB
CRC
MSB
* Register value = 0x0000 = fault mode not activated, 0x0001 = fault mode activated
0x06 --- Write single register (BUZZER_ENABLE)
Query
Slave address
(0x01 to 0xFF)
0x06
0x00 0x08 0x00
Register
value LSB
CRC
LSB
CRC
MSB
Response
Slave address
(0x01 to 0xFF)
0x06 0x00 0x08 0x00
Register
value LSB
CRC
LSB
CRC
MSB
* Register value = 0x0000 = buzzer disable, 0x0001 = buzzer enable
0x06 --- Write single register (BUZZER_TRIP)
Query
Slave address
(0x01 to 0xFF)
0x06
0x00 0x09 0x00
Register
value LSB
CRC
LSB
CRC
MSB
Response
Slave address
(0x01 to 0xFF)
0x06 0x00 0x09 0x00
Register
value LSB
CRC
LSB
CRC
MSB
* Register value = 0x0000 to 0x0030, corresponding to 20 to 500 ppm, TRIP = 20 + 10 * (BUZZER_TRIP)