Modbus
Register
Address
Information
R/W
Type
Size
Description
Notes
40108
Heart Beat
R
u16
1
This Heartbeat is provided to facilitate detection of
communications problems in programming
environments where the transport layer communication
error information is unavailable. This increments
approximately every 5 seconds. It is the responsibility
of the system integrator to notify plant personnel if a
Modbus master fails to communicate with the VESDA
Sensepoint XCL. This register can facilitate this
notification.
40109 to
40110
Calibration Due
R
f32
2
This indicates the time remaining before the ECC
sensor must be calibrated or replaced. Calibration
interval - DaysPassedSinceLastSuccessfulCal.
40111
Measuring Unit
R
u8
1
Measurement Units
l
0x00 : blank (no measurement unit)
l
0x01 :
l
0x02 : mA
l
0x03 : mg/m3
l
0x04 : g/m3
l
0x05 :
l
0x06 : ppm
l
0x07 : kppm
l
0x08 : LEL·m
l
0x09 : A
l
0x0A : dB
l
0x0B : dBA
l
0x0C : ppm
40112 to
40113
Peak Reading
R
f32
2
Peak Reading
40114
Relay Fitted
R
u16
1
0x00: Relay not fitted, 0x01: Relay fitted
40115
BLE Fitted
R
u16
1
0x00: BLE not fitted, 0x01: BLE fitted
40116
Reserved
R
u16
1
40117
Temperature (°C)
R
s16
1
Transmitter temperature
40118 to
40122
Reserved
VESDA by Xtralis
VESDA Sensepoint XCL – Large Bore Installation Manual