XNX Universal Transmitter
Appendix B - Modbus Protocol
186
B.2 Modbus Registers
Modbus Holding
Register Address
Datatype
Variable Name
Description
40001
Int16
ID
MSB always 0x24 to facilitate automatic identification. LSB repeat of Modbus address.
40002
Int16
ID
Identical to 40001
40003 to 40004
Float32
fCurrentConc
The reported gas concentration in current measurement units. For example, methane at 50% LEL would be reported as 50.0 here.
This concentration is forced to zero during inhibit mode.
40005
int16
iFaultWarnNumber
This is the integer representation of the fault status. If any fault exists this will take a value in the range 1000 to 1999. Otherwise,
if any warning exists, this will take a value in the range 1 to 999. Normally, this has the value zero. For example, if the XNX
temperature is out of range, this will take the value 1103.
40006
int8
iAlmFltLev
This register contains 4 meaningful bits regarding the presence of alarms or faults. The bit assignments are as follows: Bit 0: AL1
active Bit 1: AL2 active Bit 4: Warning active Bit 6: Fault Active All others: For future expansion
Summary of Contents for XNX
Page 1: ...Technical Manual XNXTM Universal Transmitter ...
Page 2: ......
Page 6: ...XNX Universal Transmitter Table of Contents 4 Table of Contents ...
Page 11: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 9 1 Introduction ...
Page 91: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 89 3 Calibration ...
Page 104: ...XNX Universal Transmitter Section 3 Calibration 102 ...
Page 105: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 103 4 Maintenance ...
Page 128: ...XNX Universal Transmitter Section 5 Warnings Faults 126 ...
Page 129: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 127 6 Specifications ...
Page 152: ...XNX Universal Transmitter Section 6 Specifications 150 Figure 232 XNX BT Configuration ...
Page 161: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 159 7 Control Drawings ...
Page 162: ...XNX Universal Transmitter Section 7 Control Drawings 160 7 1 XNX UL INMETRO ...
Page 163: ...XNX Universal Transmitter Section 7 Control Drawings 161 ...
Page 164: ...XNX Universal Transmitter Section 7 Control Drawings 162 ...
Page 165: ...XNX Universal Transmitter Section 7 Control Drawings 163 7 2 XNX UL CSA FM ...
Page 166: ...XNX Universal Transmitter Section 7 Control Drawings 164 ...
Page 167: ...XNX Universal Transmitter Section 7 Control Drawings 165 ...
Page 192: ...XNX Universal Transmitter Appendix B Modbus Protocol 190 ...
Page 193: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 191 Appendix C Warranty ...
Page 195: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 193 Index ...
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