Honeywell XNX Technical Manual

XNX Universal Transmitter
Appendix B - Modbus Protocol
187
Modbus Holding
Register Address
Datatype Variable Name Description
40007
uint8 iMonitoringState
This has the following meanings:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21-
255
reserved
normal monitoring
in warm-up
long-term inhibit
alarm simulation
fault simulation
Loop current stimulated
in warning MFlt
in Instrument Flt
in beam block
in bump test
short-term inhibit
performing zero calibration
performing span calibration
in pre-zero calibration
in pre-span calibration
in post-zero calibration, successful
in post-span calibration, successful
in post-zero calibration, failed
in post-span calibration, failed
in align Excel mode
for future expansion
40008 int16 iHeartBeat
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 XNX. This
register can facilitate this notication.
40009 to 40010 oat32 fSensorLifeDays This indicates the time remaining before the ECC sensor must be calibrated or replaced.
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Honeywell XNX Specifications

General

Ingress Protection	IP66/67
Product Type	Universal Transmitter
Enclosure Rating	IP66/67
Display	LCD
Communication Protocols	HART, Modbus, Foundation Fieldbus
Power Supply	24 VDC nominal, 18-32 VDC
Operating Temperature	-40°C to +65°C (-40°F to +149°F)
Material	Aluminum or Stainless Steel
Gas Types	Toxic, Oxygen, and Combustible gases
Output	4-20 mA
Relays	3 programmable relays
Approvals	ATEX, IECEx, UL, CSA
Sensor Compatibility	Electrochemical, catalytic, infrared, and other sensor types