Honeywell 301C 用户手册
Honeywell 301C User Manual
XNX and XCD continued
Group
Property
Data Type
Required
1
Storage
Type
2
BACnet
Writeable?
Value
object_identifier
R
N
N
Modbus address * 256 + 2. For example an
XNX at Modbus address 010 will appear as
2562 or 0x0A02.
XNX at Modbus address 010 will appear as
2562 or 0x0A02.
object_type
enumerated
R
C
N
analog_value (2)
event_state
enumerated
R
C
N
normal (0)
object_name
character string
R
N
N
"SSS GGGG AdAAA.AlarmA" where SSS is
the sensor type, GGGG is the gas name and
AAA is the Modbus address. Values for gas
name include "CO" and "COMB". Gas
names are truncated to 4 characters.
Values for sensor type are "XNX" or "XCD"
For example, an XNX at address 10 with a
Methane sensor will populate this object
name with "XNX Meth Ad010.AlarmA"
the sensor type, GGGG is the gas name and
AAA is the Modbus address. Values for gas
name include "CO" and "COMB". Gas
names are truncated to 4 characters.
Values for sensor type are "XNX" or "XCD"
For example, an XNX at address 10 with a
Methane sensor will populate this object
name with "XNX Meth Ad010.AlarmA"
out_of_service
boolean
R
C
N
FALSE
present_value
real
R
N
N
Alarm1 threshold copied from sensor
through the 301C. This may only be
modified on the sensor.
through the 301C. This may only be
modified on the sensor.
reliability
enumerated
O
C
N
always false (0)
status_flags
in_alarm
boolean
R
C
N
always false (0)
fault
boolean
R
C
N
always false (0)
overridden
boolean
R
C
N
always false (0)
out_of_service boolean
R
C
N
always false (0)
units
enumerated
R
C
N
96 (ppm) or
98 (percent) or
95 (no_units)
98 (percent) or
95 (no_units)
object_identifier
R
N
N
Modbus address * 256 + 4. For example an
XCD at Modbus address 011 will appear as
2820 or 0x0B04.
XCD at Modbus address 011 will appear as
2820 or 0x0B04.
object_type
enumerated
R
C
N
analog_value (2)
event_state
enumerated
R
C
N
normal (0)
object_name
character string
R
N
N
"SSS GGGG AdAAA.AlarmB" where SSS is
the sensor type, GGGG is the gas name and
AAA is the Modbus address. Gas names
are truncated to 4 characters. Values for
sensor type are "XNX" or "XCD" For
example, an XCD at address 11 with an H2S
sensor will populate this object name with
"XCD H2S Ad011.AlarmB"
the sensor type, GGGG is the gas name and
AAA is the Modbus address. Gas names
are truncated to 4 characters. Values for
sensor type are "XNX" or "XCD" For
example, an XCD at address 11 with an H2S
sensor will populate this object name with
"XCD H2S Ad011.AlarmB"
out_of_service
boolean
R
C
N
FALSE
present_value
real
R
N
N
Alarm2 threshold copied from sensor
through the 301C. This may only be
modified on the sensor.
through the 301C. This may only be
modified on the sensor.
reliability
enumerated
O
C
N
no_fault_detected (0)
status_flags
in_alarm
boolean
R
C
N
always false (0)
fault
boolean
R
C
N
always false (0)
overridden
boolean
R
C
N
always false (0)
out_of_service boolean
R
C
N
always false (0)
units
enumerated
R
C
N
96 (ppm) or
98 (percent) or
95 (no_units)
98 (percent) or
95 (no_units)
An
alo
g V
alu
es
Ala
rm
A
Ala
rm
B
Notes
1 -- 'R' indicates that this property is required by ASHRAE Standard 135
'O' indicates that the property is optional in ASHRAE Standard 135
2 -- 'C' indicates the property is hard-coded as a constant
'N' indicates the property is stored in non-volatile memory
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