Detcon CX-DM - Manual (Page 26)

Model CX-DM
Table 2 CX-DM Register Map
Register Name R/W Meaning Units
40000 CX-DM-100 Device Type R = 42
40001 Range R/W Detectable Range ppm or %(O
2
)
40002 Reading R Current Gas Reading ppm or %(O
2
)
40003 Calibration Level R/W Auto Span Level ppm or %(O
2
)
40004 Life R Sensor Life %
40005 Sensor Faults R See Section 4.2.1
40006 Sensor Model R DM (set to 1)
40007 Days since Calibration R days
40008 Reserved R
40009 Reserved R
40010 Sensor Temperature R ºC
40011 Decimal Places R/W
# of decimal places in reading,
range, and AutoSpan level
values
40012 Temperature Compensation R/W See Section 4.2.2
40013 Reserved R
40014 Sensor Counts R/W
40015 Calibration Enable/Status R/W
40016 Gas Type/Units String R ASCII Text (set at factory)
40017 Gas Type/Units String R ASCII Text (set at factory)
40018 Gas Type/Units String R ASCII Text (set at factory)
40019 Gas Type/Units String R ASCII Text (set at factory)
40020 Gas Type/Units String R ASCII Text (set at factory)
40021 Gas Type/Units String R ASCII Text (set at factory)
4.2.1 Sensor Faults – Register 40005
The sensor fault status register consists of High and Low Status Bits. These bits are set/reset as faults occur or
are cleared. Each Bit has a particular meaning and displayed as follows:
Register # High Byte Low Byte
0005 Status Bits Status Bits
NOTE Bits read as 0 are FALSE, bits read as 1 are TRUE.
Status Bits High Byte:
Bit 15 – Reserved
Bit 14 – Calibration Mode
Bit 13 – Reserved
Bit 12 – Zero Fault
Bit 11 – Range Fault
Bit 10 – Reserved
Bit 9
– Clearing Fault
Bit 8 – Reserved
Status Bits Low Byte:
Bit 7 – Sensor Fault
Bit 6
– Processor Fault
Bit 5 – Memory Fault
CX-DM Instruction Manual Rev. 1.3 Page 22 of 40