Xtralis VESDA Sensepoint XCL Installation Manual page 46

VESDA
Modbus Information
Register
Address
40106 Alarm, Fault and
Warning State
40107 Device Monitoring
Status
40108 Heart Beat
40109 to Calibration Due
40110
40111 Measuring Unit
40112 to Peak Reading
40113
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R/W Type Size
R u8 1 Current device alarm, fault, warning status. The same
operation as the LED on the device.
R u8 1 To check the device, not for sensor monitoring.
*Do not use this for alarm/fault check.
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 Incom. This register can facilitate
this notification.
R f32 2 This indicates the time remaining days before the ECC
sensor must be calibrated or replaced. Calibration
interval - DaysPassedSinceLastSuccessfulCal
R u8 1
R f32 2 Gas reading peak value during sensor reading gas
conc.
VESDA Sensepoint XCL – Large Bore Installation Manual
Description
The bit assignments are as follows:
Peak Reading
Notes
Bit 0: AL1 active
l
Bit 1: AL2 active
l
Bit 4: Warning active
l
Bit 6: Fault Active
l
All others: For future expansion
l
1: Normal
l
2: Warm up after power on
l
3: Inhibit
l
12: Calibration
l
0x00 : blank (no measurement unit)
l
0x01 : %LEL
l
0x02 : mA
l
0x03 : mg/m3
l
0x04 : g/m3
l
0x05 : %Vol
l
0x06 : ppm
l
0x07 : kppm
l
0x08 : LEL•m
l
0x09 : A
l
0x0A : dB
l
0x0B : dBA
l
0x0C : ppm•m
l
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