ITEM
BACnet Modbus Modbus Modbus N2
REF
BACnet Name Object Address Data Type Scaling Metasys Imper SI
NUM
Instance Supported Address POINT LIST DESCRIPTION 12345678910
see note 5
POINT LIST CODE: S = STANDARD O = OPTIONAL N = NOT AVAILABLE
ENG UNITS
50 REM_SETPOINT AI46 559 03,04 X10 ADF 50 °F °C Remote Leaving Chilled Liquid Setpoint S
51 S1_SUBCOOL AI47 560 03,04 X10 ADF 51 °F °C Sys 1 Subcooling, Microchannel O
52 S1_EVAP_LL AI48 561 03,04 X10 ADF 52 % % Sys 1 Evaporator Liquid Level, Round Tube O
53 S2_SUBCOOL AI49 562 03,04 X10 ADF 53 °F °C Sys 2 Subcooling, Microchannel O
54 S2_EVAP_LL AI50 563 03,04 X10 ADF 54 % % Sys 2 Evaporator Liquid Level, Round Tube O
55 COOLING_RNG AI51 564 03,04 X10 ADF 55 °F °C Cooling Range S
56 S1_DSC_SHEAT AI52 565 03,04 X10 ADF 56 °F °C Sys 1 Discharge Superheat S
57 S2_DSC_SHEAT AI53 566 03,04 X10 ADF 57 °F °C Sys 2 Discharge Superheat S
58
S1_SYS_STATE AI54 567 03,04 X1 ADF 58 index index
Sys 1 System State [0=Stopped, 1=Running, 2=Faulted, 4=Locked
Out, 5=Pre-Run]
S
59
S2_SYS_STATE AI55 568 03,04 X1 ADF 59 index index
Sys 2 System State [0=Stopped, 1=Running, 2=Faulted, 4=Locked
Out, 5=Pre-Run]
S
59 S1_MTR_OVER AI56 569 03,04 X1 ADF 60 Amps Amps Sys 1 Motor Current Overload Setting S
60 S2_MTR_OVER AI57 570 03,04 X1 ADF 61 Amps Amps Sys 2 Motor Current Overload Setting S
61
FAN_TYPE AI58 571 03,04 X1 ADF 62 index index
Condenser Fan Control Type [1=Std. VSD, 2=Opt. VSD, 3=Std.
Staged, 4=Opt. Staged]
S
62
FC_MODE AI59 572 03,04 X1 ADF 63 index index
Free Cooling Mode [0=Mechanical, 1=Free Cooling, 2=Hybrid], FC
enabled
O
63 CH_ALARM BI1 1282 01,02,03 n/a BD 5 0/1 0/1 Chiller Alarm [0=No Alarm, 1=Alarm] S
64 CH_RUN BI2 1283 01,02,03 n/a BD 6 0/1 0/1 Chiller Run [0=Off, 1=On] S
65 EVAP_HEATER BI3 1284 01,02,03 n/a BD 7 0/1 0/1 Evaporator Heater [0=Off, 1=On] S
66 EVAP_PUMP BI4 1285 01,02,03 n/a BD 8 0/1 0/1 Evaporator Pump [0=Off, 1=On] S
67 S1_COMP_RUN BI5 1286 01,02,03 n/a BD 9 0/1 0/1 Sys 1 Compressor Run Status [0=Off, 1=On] S
68 S2_COMP_RUN BI6 1287 01,02,03 n/a BD 10 0/1 0/1 Sys 2 Compressor Run Status [0=Off, 1=On] S
69 S1_VI_STEP1 BI7 1288 01,02,03 n/a BD 11 0/1 0/1 Sys 1 VI Step Solenoid Valve 1 Status [0=Off, 1=On] S
70 S2_VI_STEP1 BI8 1289 01,02,03 n/a BD 12 0/1 0/1 Sys 2 VI Step Solenoid Valve 1 Status [0=Off, 1=On] S
71 S1_VI_STEP2 BI9 1290 01,02,03 n/a BD 13 0/1 0/1 Sys 1 VI Step Solenoid Valve 2 Status [0=Off, 1=On] S
72 S2_VI_STEP2 BI10 1291 01,02,03 n/a BD 14 0/1 0/1 Sys 2 VI Step Solenoid Valve 2 Status [0=Off, 1=On] S
73 WATER_GLYCOL BI11 1292 01,02,03 n/a BD 15 0/1 0/1 Water/Glycol [0=Water, 1=Glycol] S
74 LOCAL_REMOTE BI12 1293 01,02,03 n/a BD 16 0/1 0/1 Local/Remote [0=Local, 1=Remote] S
75 DISP_UNITS BI13 1294 01,02,03 n/a BD 17 0/1 0/1 Imperial/Metric [0=Imperial, 1=SI] S
76 S1_LOCKOUT BI14 1295 01,02,03 n/a BD 18 0/1 0/1 Sys 1 Lockout [0=Off, 1=On] S
77 S2_LOCKOUT BI15 1296 01,02,03 n/a BD 19 0/1 0/1 Sys 2 Lockout [0=Off, 1=On] S
78 FC_VALVE BI16 1297 01,02,03 n/a BD 20 0/1 0/1 Free Cooling Valve [0=Off, 1=On], FC enabled O
79 SOFT_SHUT BI17 1298 01,02,03 n/a BD 21 0/1 0/1 Soft Shutdown [0=Disabled, 1=Enabled] S
80 REM_EVAP BI18 1299 01,02,03 n/a BD 22 0/1 0/1 Remote Evaporator [0=Disabled, 1=Enabled] O
81
QUICK_ST BI19 1300 01,02,03 n/a BD 23 0/1 0/1 Quick Start [0=Disabled, 1=Enabled] S
82 FRAME_EF BI20 1301 01,02,03 n/a BD 24 0/1 0/1 Frame E/F [0=Disabled, 1=Enabled] S
83 SOUND_OPT BI21 1302 01,02,03 n/a BD 25 0/1 0/1 Sound Limit Option [0=Disabled, 1=Enabled] S
NOTES
1
2
3
4
5
BACnet Object Types: 0=Analog In, 1=Analog Out, 2= Analog Value, 3=Binary In, 4=Binary Out, 5=Binary Value, 8=Device, 15=Alarm Notification (0-127 are reserved ASHRAE Objects)
Modbus values are all of type signed. Scaling values in 10X BOLD indicate that scaling in Metric is X100. Scaling and signing can not be modified in the field.
BINARY READ ONLY POINTS
QTC4/FA chillers with a 031-03478-101microboard have native BACnet MS/TP, Modbus RTU and N2 communications. No external Gateway is needed for these interfaces unless Connected Chillers is desired.
Values that are not applicable due to unit configuration and options will be sent as zero (0).
WC= Inches of water column; CFM = Cubic Feet per Minute; FPM = Feet per Minute: PSI = Lbs per square inch; Pa = Pascals; kPa = Kilopascals; PPM = Part Per Million; kJ/kg = Kilojoules per Kilogram
YVAA_FA Native BACnet_Modbus_N2
Property of Johnson Controls, Inc. Subject to change without notice.
YVAA_FA Native BACnet_Modbus_N2 Data Map Rev1_0
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