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BAS-SVP046A-EN

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Appendix A.

Arbitration

The Symbio

800 controller includes arbitration logic for several points. For each read/write

point designated as “BAS”, an associated “Arbitration” point determines the behavior of that
communicated data compared to the local hardwired (or wireless) sensor and a default value.

As shown in

Figure 6, p. A–1

, the arbitrator considers all possible sources of the provided data,

including Building Management Systems (BMS), local, and default. Each potential source is
defined at a pre-determined, fixed priority. When the arbitration method is selected as full/auto,
the BMS value is used instead of the local or default values.

The point designator with the arbitrator suffix includes the full priority array, allowing the user to
see the value associated with all potential sources considered in the logic. The active point
reflects the result of the arbitration logic.

Because the arbitrated points are normally associated with sensors, the default value is invalid,
meaning the value must be provided either by the BMS or the local sensor.

Figure 6. Arbitration method - full/auto

When the Arbitration Method is selected as local, the BMS value is ignored and local value is
used instead. Though the arbitration logic still considers all inputs, any values sent by the BMS
are effectively ignored.

Figure 7. Arbitration method - local

Summary of Contents for Symbio 800

Page 1: ...ic knowledge and training Improperly installed adjusted or altered equipment by an unqualified person could result in death or serious injury When working on the equipment observe all precautions in t...

Page 2: ...actices are important to the environment our customers and the air conditioning industry All technicians who handle refrigerants must be certified according to local rules For the USA the Federal Clea...

Page 3: ...st tr ru uc ct ti io on ns s I If f t th he er re e i is s a a r ri is sk k o of f e en ne er rg gi iz ze ed d e el le ec ct tr ri ic ca al l c co on nt ta ac ct t a ar rc c o or r f fl la as sh h t...

Page 4: ...Configuration 6 Service Tool for Symbio 800 Configuration 6 Connecting to the Symbio 800 Web Interface 7 Protocol Configuration 8 LonTalk Protocol Settings 8 Profile Definition and Network Variables...

Page 5: ...MS TP BACnet IP BACnet Zigbee Air Fi BACnet IP Ethernet Wi Fi Modbus RTU Modbus TCP LonTalk For information pertaining to the integration of the Symbio 700800 controller using either Modbus or LonTal...

Page 6: ...or BACnet MS TP communications at 76 800 bps with a rotary address setting of 000 Figure 1 Symbio 800 rotary address and service tool port Service Tool for Symbio 800 Configuration The service tool us...

Page 7: ...Symbio 800 page displays click L Lo og g I In n Figure 2 Symbio 800 log in screen N No ot te e The Symbio 800 web interface can only be viewed using the USB connection Ethernet port 1 and Ethernet po...

Page 8: ...mmunications 4 Click the P Pr ro ot to oc co ol l C Co on nf fi ig gu ur ra at ti io on n tab Figure 4 Protocol Configuration 5 View the existing Protocol Configuration settings N No ot te e There are...

Page 9: ...message to the LonTalk network A service pin will broadcast the Neuron ID to the LonTalk network so a LonTalk network management tool can find a device and set its Domain Subnet Node address LonTalk c...

Page 10: ...e Location 6 nciNoiseRdcnReq SNVT_switch Default for Noise Reduction Auto On Request Noise Reduction request 7 nciRefrigerant UCPT_refrig_type Chiller Refrigerant Type Refrigerant Type 8 nciCapacityLi...

Page 11: ...pacity SNVT_lev_percent Actual Running Capacity of Unit 0 03 Chiller Power 40 nvoCapacityLim SNVT_lev_percent Current Capacity Limit Setting of Chiller 0 01 Active Demand Limit Setpoint 41 nvoLvgCHWTe...

Page 12: ...30 0 kPa Condenser Refrigerant Pressure Ckt1 69 nvoCondRfgtPrsC2 SNVT_press_f Condenser Refrigerant Pressure Circuit 2 30 0 kPa Condenser Refrigerant Pressure Ckt2 70 nvo CondRfgtTmpC1 SNVT_temp_p Con...

Page 13: ...fault Values 12 nciDevMajVer SCPTdevMajVer The major version number for the device Software Major Version 13 nciDevMinVer SCPTdevMinVer The minor version number for the device Software Minor Version 1...

Page 14: ...03 Cooling only HVAC_FREE_COOL 0A Cooling with compressor not running HVAC_ICE 0B Ice making mode u8 01234567 in_alarm bit 0 MSB in alarm mode Diagnostic Present run_enabled bit 1 run enabled Run Enab...

Page 15: ...Air Flow Ckt1 73 nvoAirFlowPctC2 SNVT_lev_percent Air Flow Percent Circuit 2 5 00 Air Flow Ckt2 76 nvoHiSideOilPrsA SNVT_press_f High Side Oil Pressure Compressor A 20 0 kPa Oil Pressure Compressor 1...

Page 16: ...nvoStartsRunTmD UNVT_starts_runtime Starts and Run Time Compressor D defined at element SNVT_count_f Starts 1 Starts Compressor 2A SNVT_time_f Run Time 360 sec Running Time Compressor 2A 118 nvoUnitP...

Page 17: ...ed as full auto the BMS value is used instead of the local or default values The point designator with the arbitrator suffix includes the full priority array allowing the user to see the value associa...

Page 18: ...hecking software maintenance plan U4 Reformatting main filesystem clearing database U5 Beginning update U12 Searching for scfw files on USB drive s U51 Updating main firmware U54 Updating FPGA image U...

Page 19: ...ry devices only and should not have any other devices added this link Figure 10 P3 machine bus global bus internal communication bus N No ot te e The P3 link is intended for factory devices only and s...

Page 20: ...e XM70 Figure 12 4 USB connectors The controller automatically detects devices on any of the ports not port specific The controller ships with all ports enabled but they can be disabled via the Web in...

Page 21: ...t Trane approved such as cellular phones Figure 13 Ethernet port 2 Touch Screen Display N No ot te e Ethernet Port 2 is for use with the Touch Screen display only Communication to other devices is not...

Page 22: ...22 BAS SVP046A EN N No ot te es s...

Page 23: ...BAS SVP046A EN 23 N No ot te es s...

Page 24: ...plications For more information please visit trane com or tranetechnologies com Trane has a policy of continuous product and product data improvements and reserves the right to change design and speci...

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