Sensepoint XCD RFD Technical Manual  SPXCDHMRFENU Issue 1
75
A.2 Modbus Registers
ModBus Register
Address
Information R/W Type Size Note
30001 Main SW Version of XCD R u8 1
30002 EEP Version of XCD R u8 1
30003 WatchDog s/w Version of XCD R u8 1
30004 Location string R string[12] 6
30010 ModBus slave ID R u8 1
30011 Monitor Status R u16 1
Upper byte : Function
Lower byte : Instrument Mode
30012 Inhibit current(mA) R u8 1 20 means 2.0mA
30013 Reserved R u16 1
30014 Active Alarm R u32 2
bit 0 Alarm 1 is active
bit 1 Alarm 2 is active
30016 Latched Alarm R u32 2
bit 0 Alarm 1 is active
bit 1 Alarm 2 is active
30018 Active Fault R u32 2
Upper Byte: fault
Lower Byte:warning
  Bit 0:W1~Bit 6:W6
  Bit 7:F1~Bit 11:F5
30020 Latched Fault R u32 2
Upper Byte: fault
Lower Byte:warning
  Bit 0:W1~Bit 6:W6
  Bit 7:F1~Bit 11:F5
40001 Systern ID code R u16 1
Upper Byte : Type Code : 0x25
Lower Byte : My Address
40002 Systern ID code R u16 1
Upper Byte : Type Code : 0x25
Lower Byte : My Address : Dummy Spacer
40003 Gas reading R f32 2
40005 Fault and Warning R u8 1
Fault = 1100 + Number
Warning = Number as is
40006 Alarm, fault and warning state R u8 1
bit 0 Alarm 1 is active
bit 1 Alarm 2 is active
bit 2,3 for future expansion
bit 4 Warning is active
bit 5 Fault is active
bit 6,7 for future expansion
Note: Latching relay setting latches Modbus 
values in register 40006.
40007 Monitor state monitering R u8 1
1 : Normal
2 : Warm Up after power on
3 : Inhibit
12 : Calibration
40008 Reserved R u16 1
40009 Ca libration Due R f32 2
40011 Measuring Unit R u8 1
4  : PPM
3  : %Vol
5  : %LEL
1  : mg/m3
40012 Peak Reading R f32 2 Peak Reading
40014 Reserved R u16 3
40017 Temperature (
o
C) R s16 1
40018 Reserved R u16 28
40046 Measuring Gas name string R string[14] 7
40053 Reserved R s16 1
40054 Temperature (
o
F) R s16 1
40055 Reserved R u16 1
40056 Relay Status R u8 1 1 : Energized, 0 : De-energized
40057 Power Supply R f32 2
40059 Calibration Interval R/W u16 1
40060 Alarm Type R/W u8 1
High nibble : Alarm 2 Type
Low nibble : Alarm 1 Type
   0: Disable, 1: Rising, 2:Falling
40061 Inhibit timeout R/w u16 1
40062 Relay conguration R/w u8 1
Bit: 0 ~ 2: Relay Type1 ~ Relay Type3
Bit: 3~5 : Relay Sstatus1 ~ Relay Status 3
Bit: 6 : Relay Latch Status