Modbus Registers - Xtralis VESDA Sensepoint XCL Installation Manual

VESDA
A.6

Modbus Registers

The Modbus version of VESDA Sensepoint XCL allows interaction with the gas detector using Modbus/RTU over an RS-485 physical layer. The Modbus interface provides a
means to monitor and interrogate the detector with the addition of being able to reset alarms remotely. The Modbus registers for VESDA Sensepoint XCL are given in the
following table.
Note: Functions associated with the relays (if fitted) is limited to the viewing of their associated parameters. It is not possible to set or control the relays over the Modbus
interface.
INCOM Register Map: Assuming that PLC base = 0
Modbus Information
Register
Address
30001 Main SW Version of
Instrument
30002 EEP Version of
Instrument
30003 to Reserved
3009
30010 Modbus Slave ID
30011 Device Monitoring
Status
30012 to Reserved
30013
30014 to Active Alarm
30015
30016 to Latched Alarm
30017
30018 to Active Fault
30019
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R/W Type Size
R u16 1 The first two numbers of SW version.
For example, V2.16.1 -> 0x0210 -> 2 and 16 (last digit
is omitted)
R u8 1
R u16 14
R u8 1
R u16 1 To check the device is monitoring the gas or not.
*Do not use this for alarm/fault check.
R u16 2
R u32 2 Active Alarm details
R u32 2 Active latched alarm details
R u32 2 Active fault details
VESDA Sensepoint XCL – Large Bore Installation Manual
Description
Upper Byte : Major version
Lower Byte : Minor version
Notes
1: Normal
l
2: Warm up after power on
l
3: Inhibit
l
12: Calibration
l
Bit 0 Alarm 1 is active
l
Bit 1 Alarm 2 is active
l
Bit 2 Alarm 3 is active (not in use)
l
Bit 0 Alarm 1 is latched
l
Bit 1 Alarm 2 is latched
l
Bit 2 Alarm 3 is latched (not in use)
l
Upper two bytes: fault
l
Lower two bytes: warning
l
Bit 0 to Bit 15: warning
l
Bit 16 to Bit 31: fault
l
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