Honeywell 301C User Manual page 202

420MDBS_IR-F9
Group
Property
object_identifier
object_type
event_state
object_name
out_of_service
present_value
reliability
status_flags
in_alarm
fault
overridden
out_of_service boolean
units
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.
1
Data Type
Required
R
enumerated R
enumerated R
character string R
boolean R
real R
enumerated O
boolean R
boolean R
boolean R
R
enumerated R
202
Storage
BACnet
2
Writeable?
Type
Modbus address * 256 + 1. For example an
C N 420MDBS at Modbus address 002 will
appear as 513 or 0x0201.
C N analog_input (0)
if gas sensor fault Fault (1),
R N
else normal (0)
"420MDBS GGGG AdXXX .GGGG " where
GGGG is the gas name and XXX is the
N N
Modbus address. Values for gas name
include "NH3".
R N FALSE
R N Gas reading
As appropriate reports
R N no_fault_detected (0) or
unreliable other (7)
if alarm or fault "true" (1)
R N
else "false" (0)
if faulty "true" (1)
R N
else "false" (0)
R N "false" (0)
R N "false" (0)
Depends on configuration of 420MDBS
N N factory configuration or 301C configuration,
usually ppm (96)
Value
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