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MAN-0076 Rev 05 Millennium II
December 07, 2012
Net Safety Monitoring Inc
Table 7: Modbus Registers
Reg#
Meaning
Readable
Writeable
40001
Concentration value as calculated by sensor
(RTUsensor_out), Channel 1
X
40002
Sensor status (RTUsensor_stat), Channel 1
X
40003
Temperature of sensor element housing in Kelvin
(RTU temperature), Channel 1
X
40004
RFU, Channel 1, always read as 0x0000
X
40005
RFU, Channel 1, always read as 0x0000
X
40006
Concentration value as calculated by sensor
(RTUsensor_out), Channel 2
X
40007
Sensor status (RTUsensor_stat), Channel 2
X
40008
Temperature of sensor element housing in Kelvin
(RTU temperature), Channel 2
X
40009
RFU, Channel 2, always read as 0x0000
X
40010
RFU, Channel 2, always read as 0x0000
X
40011
Concentration value as calculated by sensor
(RTUsensor_out), Channel 3
X
40012
Sensor status (RTUsensor_stat), Channel 3
X
40013
Temperature of sensor element housing in Kelvin
(RTU temperature), Channel 3
X
40014
RFU, Channel 3, always read as 0x0000
40015
RFU, Channel 3, always read as 0x0000
40016
Concentration value as calculated by sensor
(RTUsensor_out), Channel 4
X
40017
Sensor status (RTUsensor_stat), Channel 4
X
40018
Temperature of sensor element housing in Kelvin
(RTU temperature), Channel 4
X
40019
RFU, Channel 4, always read as 0x0000
X
40020
RFU, Channel 4, always read as 0x0000
X
**40021
Transmitter Status
X
40022 To 40090
RFU
40091
Initialize Quick calibration, channel 1 to 4
X
X
40092
Initialize Normal Calibration, channel 1 to 4
X
X
NOTE: Alarm points can be set up through MPDBUS registers 40093 to 40096
40093
Channel 1 high alarm limit
X
X
40094
Channel 1 low alarm limit
X
X
40095
Channel 2 high alarm limit
X
X
40096
Channel 2 low alarm limit
X
X
40097
RFU, Channel 3 high alarm limit
X
X
40098
RFU, Channel 3 low alarm limit
X
X
40099
RFU, Channel 4 high alarm limit
X
X
40100
RFU, Channel 4 low alarm limit
X
X
40101
Reset latch relays
X
*RFU – Reserved for future use
** The transmitter Status register (Register 40021) is a bit flag register. Table 8 on next page, shows the detailed meaning of
each bit in the register.