Sterling 30RA010-055 manual Appendix C, DataPort, DataLink, BAClink Object Definition

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

SCN TABLE	DESCRIPTION	STATUS	UNITS	POINT	DataPort	DataLink	BAClink
NAME
	GENERAL PARAMETERS
	Control Mode	(Modes 0-9)		STAT	RO	RO	RO
	Occupied	No/Yes		OCC	RO	RO	RO
	SCN Chiller	Start/Stop		CHIL_S_S	RO	RW	RW
	Low Sound Active	No/Yes		LSACTIVE	RO	RO	NA
	Alarm State	Normal/Alert/Alarm		ALM	RO	RO	RO
	Active Demand Limit	0 to 100	%	DEM_LIM	RO	RW	RW
	Override Modes In Effect	No/Yes		MODE	RO	RO	NA
	Percent Total Capacity	0 to 100	%	CAP_T	RO	RO	RO
	Requested Stage	0 to 99		STAGE	RO	RO	NA
	Active Setpoint	–20 to 70 (–28.8 to 21.1)	°F (°C)	SP	RO	RO	NA
	Control Point	–20 to 70 (–28.8 to 21.1)	°F (°C)	CTRL_PNT	RO	RW	RW
A_UNIT	Entering Fluid Temp	snnn.n	°F (°C)	EWT	RO	RO	RO
	Leaving Fluid Temp	snnn.n	°F (°C)	LWT	RO	RO	RO
	Emergency Stop	Enable/Emstop		EMSTOP	RO	RW	RW
	Minutes Left for Start	00:00 to 15:00	Minutes	MIN_LEFT	RO	RO	NA
	PUMPS
	Cooler Pump Relay 1	Off/On		COOLPMP1	RO	RO	NA
	Cooler Pump Relay 2	Off/On		COOLPMP2	RO	RO	NA
	Cooler Pump 1 Interlock	Open/Close		PMP1_FBK	RO	RO	NA
	Cooler Pump 2 Interlock	Open/Close		PMP2_FBK	RO	RO	NA
	Cooler Flow Switch	Off/On		COOLFLOW	RO	RO	NA
	Lead Pump	0, 1, 2		LEADPUMP	RO	RO	NA
	Rotate Cooler Pumps Now	No/Yes		ROT_PUMP	RO	RO	NA
	Heat/Cool Select	Heat/Cool		HC_SEL	RO	RO	NA
	CIRC. A DISCRETE OUTPUTS
	Compressor A1 Relay	Off/On		K_A1_RLY	RO	RO	RO
	Compressor A2 Relay	Off/On		K_A2_RLY	RO	RO	RO
CIRCADIO	Minimum Load Valve Relay	Off/On		MLV_RLY	RO	RO	NA
	CIRC. A DISCRETE INPUTS
	Compressor A1 Feedback	Off/On		K_A1_FBK	RO	RO	NA
	Compressor A2 Feedback	Off/On		K_A2_FBK	RO	RO	NA
	CIRCUIT A ANALOG VALUES	0 to 100	%				RO
	Percent Total Capacity			CAPA_T	RO	RO
	Percent Available Cap.	0 to 100	%	CAPA_A	RO	RO	RO
	Discharge Pressure	nnn.n	PSIG (KPA)	DP_A	RO	RO	RO
CIRCA_AN	Suction Pressure	nnn.n	PSIG (KPA)	SP_A	RO	RO	RO
	Calculated HP Setpoint A	nnn.n	°F (°C)	HSP_A	RO	RO	NA
	Saturated Condensing Tmp	snnn.n	°F (°C)	TMP_SCTA	RO	RO	RO
	Saturated Suction Temp	snnn.n	°F (°C)	TMP_SSTA	RO	RO	RO
	Compr Return Gas Temp	snnn.n	°F (°C)	TMP_RGTA	RO	RO	NA
	Suction Superheat Temp	snnn.n	dF (dC)	SH_A	RO	RO	RO
	CIRC. B DISCRETE OUTPUTS
	Compressor B1 Relay	Off/On		K_B1_RLY	RO	RO	RO
	Compressor B2 Relay	Off/On		K_B2_RLY	RO	RO	RO
CIRCBDIO	Minimum Load Valve Relay	Off/On		MLV_RLY	RO	RO	NA
	CIRC. B DISCRETE INPUTS
	Compressor B1 Feedback	Off/On		K_B1_FBK	RO	RO	NA
	Compressor B2 Feedback	Off/On		K_B2_FBK	RO	RO	NA
	CIRCUIT B ANALOG VALUES
	Percent Total Capacity	0 to 100	%	CAPB_T	RO	RO	RO
	Percent Available Cap.	0 to 100	%	CAPB_A	RO	RO	RO
	Discharge Pressure	nnn.n	PSIG (KPA)	DP_B	RO	RO	RO
CIRCB_AN	Suction Pressure	nnn.n	PSIG (KPA)	SP_B	RO	RO	RO
	Calculated HP Setpoint B	nnn.n	°F (°C)	HSP_B	RO	RO	NA
	Saturated Condensing Tmp	snnn.n	°F (°C)	TMP_SCTB	RO	RO	RO
	Saturated Suction Temp	snnn.n	°F (°C)	TMP_SSTB	RO	RO	RO
	Compr Return Gas Temp	snnn.n	°F (°C)	TMP_RGTB	RO	RO	NA
	Suction Superheat Temp	snnn.n	dF (dC)	SH_B	RO	RO	RO

LEGEND

NA — Not Available

RO — Read Only

RW — Read/Write

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.

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