
Appendix A: Network Points List for RTU Open
RTU Open v3
Carrier Proprietary and Confidential
CARRIER CORPORATION ©2016
Integration Guide
All rights reserved
41
BACnet
Modbus
Point Name
Point
Access
Units
Default
Value
BACnet Point Name
BACnet Object
ID
Modbus Register Type Modbus
Register #
3=Fan Status
4=Filter Status
5=Remote
Occupancy
6=Door Contact
Input 9 Switch
Configuration
R/W
1=NO
2=NC
1
di9_type
MSV:81019
Number Of Heat
Stages
R/W
1=1
2=2
3=0
2
heat_stages
MSV:91004
Occupancy
Source
R/W
1=Always
Occupied
2=BACnet
Schedule
3=BAS On/Off
4=Remote Occ
Input
1
occ_source
MSV:1002
Space sensor type R/W
1=T55
2=T56
3=SPT Sensor
4=None
1
spt_type
MSV:9001
Space Temp
Source
R
1=Sensor Failure
2=SPT Sensor
3=T55 / T56
4=Network
5=Airside Linkage
6=Locked Value
spt_status
MSV:2003
Unit Type
R/W
1=Heat / Cool
2=LC
WeatherExpert
3=HP O/B Ctrl
4=HP Y1/W1 Ctrl
2
unit_type
MSV:9018
ZS Temp Sensor R
0=Normal
1=Alarm
zst_sensor_fail
BV:7051
Economizer
Operation
R
0=Normal
1=Fault Detected
econ_opr
BV:7054
Space
Temperature
Alarm Status
R
0=Normal
1=Alarm
spt_alrm_status
BV:7056
SPT Sensor
R
°F
zone_temp_zone_
temp
AI:1
SPT Sensor
R
min
zone_temp_override_
time_remaining
AV:1
input_10
R
°F
ai_10
AI:1010
Factory Test
Analog 1 Control
R/W
%
0
ao1_fac_test
AV:91001
Economizer High
OAT Lockout
Temp
R/W
°F
75
oat_ec_lockout
AV:9008
Maximum Heating
SAT
R/W
°F
120
sat_ht_max
AV:83004
Compressor 2
Runtime
R
hr
comp2_rntm
AV:2018
Linkage Max
Damper Position
R
%
link_max_dmpr
AV:2611
Air Source Supply
Air Temp
R
°F
link_sat
AV:2608
Max VFD Output
R/W
%
100
max_vfd_spd
AV:3026
Dehum Min VFD
R/W
%
100
dehum_min_vfd
AV:3028