58 RMWH-SVX001C-EN
Appendix D: MODBUS Holding Registers
TruSense RMWH Refrigerant
Monitor—MODBUS RTU (Holding
Registers)
Section Register Name Channel # Index Property Notes
General
Product ID
General
40001 Read “CG”
Firmware Version 1 40002 Read
Major(MSB:1b)/Minor(1b)
Firmware Version 2 40003 Read Build(2b)
Reserved 4 40004 Read
0
Reserved 5 40005 Read 0
Reserved 6 40006 Read
0
Unit Status 40007 Read Refer to “Unit Status Flags,” p. 60
ACK button 40008 Write
ACK by writing 1 to it
RESET button 40009 Write Refer to “RESET Button Actions,” p. 60
Channels
1 Gas Number
Channel 1
40010 Read Refer to “Gas Types,” p. 61
1 Gas Conc. 40011 Read ppm
1 Status 40012 Read Refer to “Channel Status Flags,” p. 61
1 Reserved 40013 Read 0
2 Gas Number
Channel 2
40014 Read Refer to “Gas Types,” p. 61
2 Gas Conc. 40015 Read ppm
2 Status 40016 Read Refer to “Channel Status Flags,” p. 61
2 Reserved 40017 Read 0
3 Gas Number
Channel 3
40018 Read Refer to “Gas Types,” p. 61
3 Gas Conc. 40019 Read ppm
3 Status 40020 Read Refer to “Channel Status Flags,” p. 61
3 Reserved 40021 Read 0
4 Gas Number
Channel 4
40022 Read Refer to “Gas Types,” p. 61
4 Gas Conc. 40023 Read ppm
4 Status 40024 Read Refer to “Channel Status Flags,” p. 61
4 Reserved 40025 Read 0
5 Gas Number
Channel 5
40026 Read Refer to “Gas Types,” p. 61
5 Gas Conc. 40027 Read ppm
5 Status 40028 Read Refer to “Channel Status Flags,” p. 61
5 Reserved 40029 Read 0
6 Gas Number
Channel 6
40030 Read Refer to “Gas Types,” p. 61
6 Gas Conc. 40031 Read ppm
6 Status 40032 Read Refer to “Channel Status Flags,” p. 61
6 Reserved 40033 Read 0
7 Gas Number
Channel 7
40034 Read Refer to “Gas Types,” p. 61
7 Gas Conc. 40035 Read ppm
7 Status 40036 Read Refer to “Channel Status Flags,” p. 61
7 Reserved 40037 Read 0
8 Gas Number
Channel 8
40038 Read Refer to “Gas Types,” p. 61
8 Gas Conc. 40039 Read ppm
8 Status 40040 Read Refer to “Channel Status Flags,” p. 61
8 Reserved 40041 Read 0
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