Honeywell 301C User Manual
Honeywell 301C User Manual
420MDBS_IR-F9
93
Property
Data Type
Required
1
Storage
Type
2
BACnet
Writeable?
Value
object_identifier
R
C
N
Modbus address * 256 + 1. For example an
420MDBS at Modbus address 002 will
appear as 513 or 0x0201.
420MDBS at Modbus address 002 will
appear as 513 or 0x0201.
object_type
enumerated
R
C
N
analog_input (0)
event_state
enumerated
R
R
N
if gas sensor fault Fault (1),
else normal (0)
else normal (0)
object_name
character string
R
N
N
"420MDBS GGGG AdXXX .GGGG" where
GGGG is the gas name and XXX is the
Modbus address. Values for gas name
include "NH3".
GGGG is the gas name and XXX is the
Modbus address. Values for gas name
include "NH3".
out_of_service
boolean
R
R
N
FALSE
present_value
real
R
R
N
Gas reading
an
al
og
_i
n
gas
reliability
enumerated
O
R
N
As appropriate reports
no_fault_detected (0) or
unreliable other (7)
no_fault_detected (0) or
unreliable other (7)
status_flags
in_alarm
boolean
R
R
N
if alarm or fault "true" (1)
else "false" (0)
else "false" (0)
fault
boolean
R
R
N
if faulty "true" (1)
else "false" (0)
else "false" (0)
overridden
boolean
R
R
N
"false" (0)
out_of_service boolean
R
R
N
"false" (0)
units
enumerated
R
N
N
Depends on configuration of 420MDBS
factory configuration or 301C configuration,
usually ppm (96)
factory configuration or 301C configuration,
usually ppm (96)
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
'R' indicate the property is computed constantly and stored in RAM.
'R' indicate the property is computed constantly and stored in RAM.
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