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APPENDIX C
Building Interface —
The 30RAN chiller can be inter-
faced with multi-vendor control systems through 3 levels of
inter-operability using BAClink, DataPort™, or DataLink™
controls. BAClink controls function as a gateway between a
SCN and a BACnet™ system to facilitate the passing of data
from the SCN to BACnet. The Sterlco DataPort control is an
interface device that allows other HVAC control systems to
“read only” values in system elements connected to a SCN
communication bus. The Sterlco DataLink control is an inter-
face device that allows other HVAC control systems to read
and change (“read/write”) values in system elements connected
to a SCN bus. Both DataPort and DataLink controls request
data from a specified SCN system element and translate this
data into ASCII characters off network. Information from the
30RAN chiller control to support interface are listed in the
following tables.
DataPort, DataLink, BAClink Object Definition
LEGEND
NOTE: In order to write to any point with DataLink or BAClink con-
trols, the machine must be configured for SCN control. CTRL
Control Method
(Configuration mode, sub-mode OPT2) must be set
to 3 = SCN Control.
SCN TABLE
NAME
DESCRIPTION STATUS UNITS POINT DataPort DataLink BAClink
A_UNIT
GENERAL PARAMETERS
Control Mode
Occupied
SCN Chiller
Low Sound Active
Alarm State
Active Demand Limit
Override Modes In Effect
Percent Total Capacity
Requested Stage
Active Setpoint
Control Point
Entering Fluid Temp
Leaving Fluid Temp
Emergency Stop
Minutes Left for Start
PUMPS
Cooler Pump Relay 1
Cooler Pump Relay 2
Cooler Pump 1 Interlock
Cooler Pump 2 Interlock
Cooler Flow Switch
Lead Pump
Rotate Cooler Pumps Now
Heat/Cool Select
(Modes 0-9)
No/Yes
Start/Stop
No/Yes
Normal/Alert/Alarm
0 to 100
No/Yes
0 to 100
0 to 99
–20 to 70 (–28.8 to 21.1)
–20 to 70 (–28.8 to 21.1)
snnn.n
snnn.n
Enable/Emstop
00:00 to 15:00
Off/On
Off/On
Open/Close
Open/Close
Off/On
0, 1, 2
No/Yes
Heat/Cool
%
%
°F (°C)
°F (°C)
°F (°C)
°F (°C)
Minutes
STAT
OCC
CHIL_S_S
LSACTIVE
ALM
DEM_LIM
MODE
CAP_T
STAGE
SP
CTRL_PNT
EWT
LWT
EMSTOP
MIN_LEFT
COOLPMP1
COOLPMP2
PMP1_FBK
PMP2_FBK
COOLFLOW
LEADPUMP
ROT_PUMP
HC_SEL
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RW
RO
RO
RW
RO
RO
RO
RO
RW
RO
RO
RW
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RW
NA
RO
RW
NA
RO
NA
NA
RW
RO
RO
RW
NA
NA
NA
NA
NA
NA
NA
NA
NA
CIRCADIO
CIRC. A DISCRETE OUTPUTS
Compressor A1 Relay
Compressor A2 Relay
Minimum Load Valve Relay
CIRC. A DISCRETE INPUTS
Compressor A1 Feedback
Compressor A2 Feedback
Off/On
Off/On
Off/On
Off/On
Off/On
K_A1_RLY
K_A2_RLY
MLV_RLY
K_A1_FBK
K_A2_FBK
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
NA
NA
NA
CIRCA_AN
CIRCUIT A ANALOG VALUES
Percent Total Capacity
Percent Available Cap.
Discharge Pressure
Suction Pressure
Calculated HP Setpoint A
Saturated Condensing Tmp
Saturated Suction Temp
Compr Return Gas Temp
Suction Superheat Temp
0 to 100
0 to 100
nnn.n
nnn.n
nnn.n
snnn.n
snnn.n
snnn.n
snnn.n
%
%
PSIG (KPA)
PSIG (KPA)
°F (°C)
°F (°C)
°F (°C)
°F (°C)
dF (dC)
CAPA_T
CAPA_A
DP_A
SP_A
HSP_A
TMP_SCTA
TMP_SSTA
TMP_RGTA
SH_A
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
NA
RO
RO
NA
RO
CIRCBDIO
CIRC. B DISCRETE OUTPUTS
Compressor B1 Relay
Compressor B2 Relay
Minimum Load Valve Relay
CIRC. B DISCRETE INPUTS
Compressor B1 Feedback
Compressor B2 Feedback
Off/On
Off/On
Off/On
Off/On
Off/On
K_B1_RLY
K_B2_RLY
MLV_RLY
K_B1_FBK
K_B2_FBK
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
NA
NA
NA
CIRCB_AN
CIRCUIT B ANALOG VALUES
Percent Total Capacity
Percent Available Cap.
Discharge Pressure
Suction Pressure
Calculated HP Setpoint B
Saturated Condensing Tmp
Saturated Suction Temp
Compr Return Gas Temp
Suction Superheat Temp
0 to 100
0 to 100
nnn.n
nnn.n
nnn.n
snnn.n
snnn.n
snnn.n
snnn.n
%
%
PSIG (KPA)
PSIG (KPA)
°F (°C)
°F (°C)
°F (°C)
°F (°C)
dF (dC)
CAPB_T
CAPB_A
DP_B
SP_B
HSP_B
TMP_SCTB
TMP_SSTB
TMP_RGTB
SH_B
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
NA
RO
RO
NA
RO
NA —
Not Available
RO —
Read Only
RW —
Read/Write