American Standard CH530 manual Interprocessor Communication, Inter Processor Communications IPC3

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Interprocessor Communication

Inter Processor

Communications IPC3

When using Tracer CH530, you will not be required to know all the details about the structure of the IPC3 bus. However this page gives detailed information about the system for those of you that are really interested in how it works. The IPC3 protocol is based on RS485 signal technology. IPC3 was designed to be very efficient. It communicates at 19.2 Kbaud.

IPC3 Definitions:

Bus Management:

The DynaView™ provides the bus management having the task of restarting the link, or filling in for missing nodes when the normal communication has been degraded. This involves reassigning node addresses and filling in for nodes that are off-line. The DynaView™ always has a node number of 01.

Node Assignment: When a unit is factory commissioned, the Low Level Intelligent Device (LLID), or module, must have their node addresses assigned to them for storage in non- volatile memory. The node addresses are normally assigned sequentially during factory commissioning.

Node Zero:

Node number zero is is a special node assignment that is reserved for devices that are service selected. A LLID communicating on node address zero will also communicate on an assigned node address. A LLID will only communicate on node address zero if it is service selected.

Binding:

Binding is the process of assigning a node number and functional IDs to a LLID. Binding is a simple process:

1.Service selecting the LLID with a magnet.

2.Assigning functional IDs to that LLID with TechView™.

Functional Identification:

When each LLID on the bus is bound, its inputs and outputs are given a functional ID. The Frame LLIDS have only one functional ID, but most Panel LLIDs have more than one functional ID. A dual high voltage binary input will have two functional IDs, a quad relay output has four functional IDs.

The DynaView™ Main Processor with its IPC3 Bus communicates to the control panel devices, unit mounted devices, and any remote devices on the IPC3 bus network. The various devices are discussed in the upcoming sections.

Control Panel Internally mounted devices

For visual identification Internal Control Panel mounted devices are identified by their respective schematic designation number. Control panel items are marked on the inner back panel in the control panel. Figure 24 illustrated below, identifies these devices. The Control Panel Devices table corresponds to the same device designators (see right hand column). Optional controls are present when a specific optional controls package is specified, as listed in the second column. Optional controls packages are; OPST Operating Status, GBAS Generic Building Systems, EXOP Extended operation, CDRP Condenser Pressure, TRMM Tracer communications, WPSR Water Flow Pressure sensing, FRCL Free Cooling, HGBP Hot Gas Bypass , and EPRO Enhanced Protection

Figure 24 illustrates the Control Panel Components Layout.

LLID Modules 1A1, 1A3, 1A4, 1A5, 1A6, 1A7, and 1A13 are standard and present in all configurations. Other Modules vary depending on machine optional devices.

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Contents X39640670030CDHF-SVU01C-EN Read these carefully Contents Unit Nameplate General InformationLiterature change About this manualGeneral Information = 560 3 stage 935 2 stage Y = 500 3 stage 835 2 stage Control Optional Packages Commonly Used AcronymsGeneral Duplex unit components front view OverviewGeneral Duplex unit components 2 stage compressor Compressor 1 or 2 2 Stage Cooling CyclePressure enthalpy curve 3 stage compressor Pressure enthalpy curve 2 stage compressor DynaView Human Interface TechView Chiller Service ToolTimeline Text Figures Power Up DiagramSoftware Operation Overview Diagram Software States FigureStaging Second Compressor On CDHE/F/G sequence of operation auto to runningSatisfied Setpoint Staging Second Compressor OffCDHF/G sequence of operation lead 1/lag CDHE/F/G sequence of operation lead 2 lag Fixed Sequence Compressor 2 / CompressorCDHF/G sequence of operation equalize starts and hours Sequencing Balanced Starts and HoursCDHF/G sequence of operation combined start Simultaneous Compressor Start/ StopClear Restart Inhibit Restart Inhibit Start to Start Time SettingRestart Inhibit Restart Inhibit Free StartsOil and Refrigerant Pump Surface TemperaturesOil refrigerant pump circuit 1 or 20 100 percent RLA Base Loading Control AlgorithmGeneral Information Sequence of operation ice making running to ice making Ice Machine ControlHot Water control Unit Control Panel UCP Control Panel Devices and Unit Mounted DevicesUnit Control Panel UCP User-defined language support Variable water flow through the evaporatorDynaView main processor Operator InterfaceOperator Interface How It Works Chiller Stop Prevention/Inhibit FeatureTop Level Mode Description System Reset Reference Main Screen Data Fields Table Chiller Operating ModeCircuit Operating Mode Main ScreenDiagnostic Screen Back button provides navigation back to the chiller screen Operator Interface Reports Report MenuReport name Circuit Condenser Report name System EvaporatorReport name Circuit Evaporator Report name System CondenserReport name System Ashrae Chiller Log Historic Diagnostics LogHeader Screen Setting Tab screens provides a userChiller Feature SettingsPurge System Mode OverridesCircuit Mode Overrides Display SettingsOperator Interface Operator Interface Operator Interface Operator Interface Operator Interface Binding Interprocessor CommunicationInter Processor Communications IPC3 IPC3 Definitions Bus ManagementControl panel components layout Control System ComponentsControl System Components Control Panel Devices Compressor Running Relay Machine Shutdown Manual Reset MMRHead Relief Request Output Maximum Capacity RelayExop Refrigerant Monitor Input 1A17Trmm TRM4 Tracer Comm 4 interface Cdrp Condenser Refrigerant Pressure OutputEpro Enhanced Protection Pressure based Temperature basedCdrp Refrigerant Pressure Output Option 1A15 Condenser Pressure OutputRefrigerant Differential Pressure Indication Output Percent RLA Output Gbas Generic Building Automation SystemWpsr WFC Water Pressure Sensing Option Module CharacteristicsExternal Chilled Water Setpoint Ecws External Current Limit Setpoint1A8, 1A9, 1A11, 1A12 Quad Relay Output Status 1A13, 1A18, 1A19, 1A20 Dual Binary input module1A14 Communication interface Module Recommended Length to Run external Output signals 1A15, 1A16, 1A17, 1A21 Dual Analog Input/output ModuleAnalog Input Unit mounted devices Control System Components Control System Components Control Sequence of Operation Electrical SequenceUCP and Wye-Delta Starter Control Circuits Delay time 200 msec. Opens 2K1 Control Sequence of Operation Test and start timing sequence Control Sequence OperationAFD Machine Protection Adaptive Control Momentary Power Loss MPL ProtectionOverload trip time versus percent RLA Current Overload ProtectionPhase Loss Protection Current Limit ProtectionReverse Rotation Protection Differential to Start or Stop SoftLoadingMinimum and Maximum Capacity Limit Evaporator Limit Leaving Water Temperature CutoutHead Relief Relay Low Refrigerant Temperature CutoutCutout strategy Condenser Limit Restart Inhibit High Vacuum Lockout Oil Temperature Control Return Water Controls Chilled Water Reset CWROutdoor Air Temperature Maximum ResetEquation Values for start reset typesDegrees of Reset Constant ReturnOutdoor air temperature versus degrees of reset Reset RatioReset function for return CWR Reset Ratio = 50% Return CWR Unit Start-Up Procedures Unit StartupDaily Unit Start-Up Mode Live Electrical ComponentsToxic Hazards Seasonal Unit Start-UpSeasonal Unit Shutdown Unit Shutdown ProceduresUnit Shutdown Oil Pump Heater OperationRecord Keeping Forms Periodic MaintenanceDaily Maintenance and Checks Moisture ContaminationEvery 3 Months Weekly MaintenanceNormal Chiller Operating Characteristics Hazardous Voltage w/CapacitorsAnnual Maintenance Off-Season MaintenanceCompressor Oil Change Oil MaintenanceOil Change Procedure Heater DamageReplacing Oil Filter Oil Filter ReplacementHazardous Voltage w/ Capacitors MaintenanceOil Supply System Problems Other Maintenance RequirementsFront View with Refrigerant Pump Rotary valve in drain positionRefrigerant Charge Contains RefrigerantProper Water Treatment Recovery and Recycle ConnectionsLeak Testing Cleaning the CondenserCleaning the Evaporator Control Settings AdjustmentsUnit Corrosion Damage Unit Preparation Purge System103 104 105 106 107 108 109 110 111 112 113 114 115 Trane
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