| Property | Type | Description |
|
Alarm Event Class[1-3] |
Numeric |
This is a three element array containing entries for alarm classes Manual Reset, Auto Reset, & Informational diagnostics. Each entry contains an index into the event action table. The event action table contains both a set of instructions for alarm routing, and a stretchy list of referencer objects (the potential receivers). |
|
Alarm Output |
Binary |
This property indicates the state of the alarm relay output on the CYCLONE UCM. The UCM provides an isolated SPDT output suitable for customer connection for remote alarm indication. The output is energized for all manually resettable diagnostics (MMR’s and CMR’s) when detected and deenergized when the UCM is manually reset. This remote alarm function does not apply to faults that reset automatically (MAR’s and IAR’s). 0=OFF, 1=ON |
|
Capacity Control: External |
Binary |
The UCM accepts an isolated contact closure input that is suitable for customer connection to be used to inhibit compressor operation because of high ambient temperatures or to provided KW demand limiting. When open, the UCM does not operate the lag compressor for either refrigerant circuit. If both compressors on a circuit are operating when the contact transitions from closed to open, the lag compressor will stop. When closed, the UCM operates both compressors normally. When used for high ambient operation inhibit, a separate remote ambient sensing thermostat is required. Note: The capacity control function must not be used in the ice building mode. 0=NORMAL, 1=REDUCED |
|
Capacity Control: Ref |
Referencer |
Feeds the "Capacity Control: Tracer" property. 0=NORMAL, 1=REDUCED |
|
Capacity Control: Tracer |
Binary |
When Reduced, the UCM does not operate the lag compressor for either refrigerant circuit. If both compressors on a circuit are operating when reduced, the lag compressor will stop. When Normal, the UCM operates both compressors normally. Note: The capacity control feature must not be used in the ice building mode. 0=NORMAL, 1=REDUCED |
|
Chilled Water Flow Status |
Binary |
The UCM will accept an isolated contact closure input suitable for customer connection for interlocking with a customer-installed evaporator chilled water flow switch and customer provided pump starter auxiliary contact. This input must be closed to start compressors. Loss of chilled water flow results in an automatically resettable diagnostic (MAR). Momentary (six seconds) opening of the flow switch due to turbulent water flow, etc, is allowed. 0=NO, 1=YES |
|
Chilled Water Reset Type |
Multi-State |
For the following, start, gain, and max are defined by the "FP Start Reset", "FP Reset Ratio", and "FP Max Reset", respectively. When Outdoor Air Based Reset is enabled, any chilled water setpoint (local or Tracer) will be modified by the following equations: |
|
Chilled Water Setpoint: Active |
Numeric |
This property indicates the active value of the chilled water setpoint. This value may be limited on the low end by the leaving water temperature cutout setpoint. Valid only when not in Ice Mode (Ice Making Status=Normal). Range: 0 to 65° F |
|
Chilled Water Setpoint: Ref |
Referencer |
Feeds the Chilled Water Setpoint: Tracer. Range: 0 to 65°F |
|
Chilled Water Setpoint: Tracer |
Numeric |
This setpoint is the primary control value for the chiller in non-Ice Making mode. Range: 0 to 65°F |
|
Chilled Water Temp: Entering |
Numeric |
The UCM continuously senses and compares entering and leaving chilled water temperatures to detect loss of chilled water flow. If the entering water temp drops below the leaving water temp by more than 2 F°, a manually resettable diagnostic is generated in 100 F° seconds. This feature is active only if one compressor, or more, is operating. Range: -40 to 142° F |
|
Chilled Water Temp: Leaving |
Numeric |
Leaving refers to leaving the chiller’s evaporator. Maintaining this temperature is the primary control objective of the chiller. Range: -40 to 142° F |
|
Chiller Enable/Disable: External |
Binary |
Also known as external auto/stop. The UCM accepts an isolated contact closure input suitable for customer connection to put the unit in either Auto or Stop from a remote device. This input overrides the Chiller switch on the UCM when the Chiller switch is in Auto (auto/local or auto/remote). It does not override the Chiller switch when the switch is in Stop. The input contacts are closed for external Auto operation and open to put the unit in external Stop. 0=STOP, 1=AUTO |
|
Chiller Enable/Disable: Tracer |
Binary |
This property is the Tracer’s request to enable or disable the chiller. 0=STOP, 1=AUTO. |
|
Comm Loss Mode: Request |
Multi-State |
This property defines what value the UCM should use for a unit disable: comm loss. Off means Stop, and when Last state is selected, the Unit Disable: Tracer value is used. 0=OFF, 1=AUTO, 2=LAST STATE. |
|
Comm Loss Mode: Tracer |
Binary |
This property defines the value last communicated to the UCM before communication was lost. 0=OFF, 1=AUTO. |
|
Communication Address |
Numeric |
This is the communications address of the UCM being represented. |
|
Communication Channel |
Numeric |
This is the communications channel of the UCM being represented. |
|
Communication Retry |
Binary |
Provides access to the communications retry indicator. This property is used to signal the control server that it needs to force control data output to the device when it is awakened for maintenance operations. The communications retry indicator is set (TRUE) when an attempt to send control data fails, and cleared (FALSE) when communications are successful. |
|
Communication State |
Binary |
This property indicates the status of communications between the BCU and the UCM. 0=Down, 1=Up. |
|
Comp Number Enabled: Tracer |
Numeric |
Value used to enforce mechanical cooling lockout. 0=0, 1=1, 2=2, 3=3, 4=4 COMPRESSORS ENABLED. |
|
Comp: Number Of |
Numeric |
20, 25, and 30 Ton chillers have 2 compressors, 40, 50, and 60 Ton chillers have 4 compressors. 2=2 COMPRESSORS, 4=4 COMPRESSORS. |
|
Compressor A Output |
Binary |
This property indicates the state of the Compressor A output relay. 0=OFF, 1=ON |
|
Compressor A Run Time |
Numeric |
This property indicates the number of hours compressor A has run since the last clearing of this counter. Integer counter will clamp at 255 until reset to 0. Range: 0 to 255 hours |
|
Compressor A Starts |
Numeric |
This property indicates the number of starts compressor A has had since the last clearing of this counter. Integer counter will clamp at 255 until reset to 0. Range: 0 to 255 starts |
|
Compressor B Output |
Binary |
This property indicates the state of the Compressor B output relay. 0=OFF, 1=ON |
|
Compressor B Run Time |
Numeric |
This property indicates the number of hours compressor B has run since the last clearing of this counter. Integer counter will clamp at 255 until reset to 0. Range: 0 to 255 hours |
|
Compressor B Starts |
Numeric |
This property indicates the number of starts compressor B has had since the last clearing of this counter. Integer counter will clamp at 255 until reset to 0. Range: 0 to 255 starts |
|
Compressor C Output |
Binary |
This property indicates the state of the Compressor C output relay. 0=OFF, 1=ON |
|
Compressor C Run Time |
Numeric |
This property indicates the number of hours compressor C has run since the last clearing of this counter. Integer counter will clamp at 255 until reset to 0. Range: 0 to 255 hours |
|
Compressor C Starts |
Numeric |
This property indicates the number of starts compressor C has had since the last clearing of this counter. Integer counter will clamp at 255 until reset to 0. Range: 0 to 255 starts |
|
Compressor D Output |
Binary |
This property indicates the state of the Compressor D output relay. 0=OFF, 1=ON |
|
Compressor D Run Time |
Numeric |
This property indicates the number of hours compressor D has run since the last clearing of this counter. Integer counter will clamp at 255 until reset to 0. Range: 0 to 255 hours |
|
Compressor D Starts |
Numeric |
This property indicates the number of starts compressor D has had since the last clearing of this counter. Integer counter will clamp at 255 until reset to 0. Range: 0 to 255 starts |
|
Compressor Running |
Binary |
The UCM provides an isolated SPDT output suitable for customer connection for remote "compressors running" indication. This output is energized when any compressor is operating (or commanded to run) and deenergized when no compressors are operating (or "no compressor operating" command is in effect). 0=ALL COMPRESSORS OFF, 1=AT LEAST ONE COMPRESSOR IS RUNNING |
|
Cond Saturated Refrig Temp: CKT1 |
Numeric |
This property is used for monitoring the condition of the condenser on circuit 1. Only valid with A/C condenser. Range: -40 to 158° F |
|
Cond Saturated Refrig Temp: CKT2 |
Numeric |
This property is used for monitoring the condition of the condenser on circuit 2. Only valid with A/C condenser and there are 4 compressors. Range: -40 to 158° F |
|
Condenser Fan Contactor: CKT1[1-2] |
Binary |
This property indicates the active status of fans on the condenser on circuit 1. The 20 and 40 Ton units have 2 condenser fans controlled by the 2 outputs on circuit 1. 25, 30, 50, 60 Ton units have 3 condenser fans controlled by the 2 outputs on circuit 1. UCM condenser fan control logic is dependent on the number of compressors operating per circuit and on ambient temperature. Fan logic is not initiated until LPC closure when outdoor air temperature is below 50° F. Only valid with A/C condenser. |
|
Condenser Fan Contactor: CKT2[1-2] |
Binary |
This property indicates the active status of fans on the condenser on circuit 2. The 40 Ton units have 2 condenser fans controlled by the 2 outputs on circuit 2. 50 and 60 Ton units have 3 condenser fans controlled by the 2 outputs on circuit 2. UCM condenser fan control logic is dependent on the number of compressors operating per circuit and on ambient temperature. Fan logic is not initiated until LPC closure when outdoor air temperature is below 50° F. Only valid with A/C condenser and there are 4 compressors. |
|
Condenser Water Pump Output |
Binary |
The UCM provides a single isolated contract closure output suitable for customer connection to control the condenser water pump. Only valid with W/C condenser. 0=OFF, 1=ON. |
|
Condenser Water Temp: Entering |
Numeric |
This property is used for monitoring the condition of the water entering the condenser. Only valid with W/C condenser. Range: -40 to 158° F. |
|
Condenser Water Temp: Leaving |
Numeric |
This property is used for monitoring the condition of the water leaving the condenser. Only valid with W/C condenser. Range: -40 to 158° F integer. |
|
Config: Communications |
Binary |
If communications are disabled, the CYCLONE will answer scan requests with garbage data. 0=DISABLE, 1=ENABLE |
|
Config: External Setpoint |
Binary |
When Enabled, the local chilled water setpoint (0 to 65° F) is read in from a 2 to 10V analog input on the CSR module. 0=DISABLED, 1=ENABLED. |
|
Config: Head Pressure Control |
Binary |
Enables the condenser temperature sensor diagnostic function. Only valid with W/C condenser. 0=DISABLED, 1=ENABLED |
|
Config: Ice Machine Control |
Binary |
This feature must be Enabled for either the shorted zone temp sensor or the Tracer to put the unit into Ice Making. When the zone temp sensor is shorted, the ice termination setpoint is entered in the external setpoint input . When the Tracer puts the unit into Ice Making, the "Ice Termination Setpoint: Tracer" is used. 0=DISABLED, 1=ENABLED |
|
Config: Reset Option |
Binary |
This property is a reflection of the software lock that enables the three chilled water reset functions. 0=DISABLED, 1=ENABLED |
|
Configuration: Pumpdown |
Binary |
Pumpdown enabled means that before the last compressor on a circuit is turned off, a liquid line soleniod valve is closed, forcing all of the refrigerant from the evaporator to the condenser. Termination of pumpdown is via a detected low pressure cutout or 30 seconds, whichever comes first. 0=DISABLED, 1=ENABLED |
|
Control Event Class |
Numeric |
This property identifies the control event class to be used for controlling the given commandable object. |
|
Diag: Last |
Multi-State |
00 = none |
|
External Interlock Input |
Binary |
The UCM accepts an isolated contact closure input that is suitable for interlocking with either a customer specified or provided device. The input contact is closed for normal operation. Opening the contacts will cause a Machine Shutdown/Manual Reset (MMR) diagnostic. 0=NORMAL, 1=TRIP |
|
FP Chilled Water Setpoint |
Numeric |
Set by a pot on the front panel of the UCM. This value may be limited on the low end by the following equation: |
|
FP Control Response Setpoint |
Numeric |
It is recommended that this value remain at the factory setting. If the temperature control appears to be too responsive or reactive, or if compressor cycle rate is too high, reduce the control response setpoint. Conversely, if temperature control is too sluggish, increase the control response setpoint. Range: 1 to 128. 25 is nominal. |
|
FP Design Delta Temp Setpoint |
Numeric |
This number is used to define the separation between the chilled water setpoint and the leaving water temp cutout setpoint. See "FP Chilled Water Setpoint" for details of this relationship. Range: 4 to 20° F. 10° F is nominal. |
|
Front Panel: Max Reset |
Numeric |
This index sets the maximum amount of setpoint reset allowed during any of the three reset types: zone based, outdoor air based and return based. The index is interpreted differently for each reset type. Range: 0 to 7. |
|
Front Panel: Reset Ratio |
Numeric |
This index sets the rate of which the setpoint reset approaches its maximum reset amount with respect to the input parameter during any of the three reset types: zone based, outdoor air based and return based. The index is interpreted differently for each reset type. Range: 0 to 7. |
|
Front Panel: Start Reset |
Numeric |
This index sets the starting point for setpoint reset allowed during any of the three reset types: zone based, outdoor air based and return based. The index is interpreted differently for each reset type. Range: 0 to 15. |
|
Hot Gas Bypass Hours History |
Numeric |
This property indicates the number of hours the chiller has done hot gas bypass since the last clearing of this counter. Integer counter will clamp at 255 until reset to 0. Range: 0 to 255 hours |
|
Hot Gas Bypass Option |
Binary |
BCU bit polarity is the inverse of UCM bit polarity. Hot Gas Bypass is not allowed when this property is disabled. Refer to the Hot Gas Bypass Status property for more information on Hot Gas Bypass. 0=DISABLED, 1=ENABLED |
|
Hot Gas Bypass Starts |
Numeric |
This property indicates the number of times the chiller has been in hot gas bypass mode since the last clearing of this counter. Integer counter will clamp at 255 until reset to 0. Range: 0 to 255 starts |
|
Hot Gas Bypass Status |
Binary |
Hot Gas Bypass (HGBP) is only available when compressor A alone is running. HGBP is a mechanism to reduce the capacity of the system so that very light loads (less than 1 compressor) can be better matched without rapid cycling of the compressor. This output can remain on for up to 30 minutes before either turning off the compressor or going back to full compressor load. There is no minimum off time before a restart after the HGBP is turned off. 0=HGBP INACTIVE, 1=HGBP ACTIVE |
|
Ice Making Request: Ref |
Referencer |
Feeds the Ice Making Request: Tracer. 0=OFF (normal, non-ice making), 1=ON - ICE MAKING. |
|
Ice Making Request: Tracer |
Binary |
Should only be used on systems that have ice making capabilities. 0=OFF (normal, non-ice making), 1=ON-ICE MAKING |
|
Ice Making Status |
Binary |
Ice mode is a way of storing cold in large vats of Ice (or other freezing liquid). Ice mode is typically entered at night when energy costs are lower. Ice mode usually means running the chiller at full capacity until the Ice storage tanks are completely frozen and then shutting off the chiller for the duration of Ice mode (ice complete). This ice can then be used throughout the day to cool the load. Normal mode is trying to maintain chilled water temp by cycling on and off compressors to meet the load. 0=NORMAL MODE, 1=ICE MODE. |
|
Ice Termination Setpoint: Ref |
Referencer |
Feeds the Ice Termination Setpoint: Tracer. Range: 20 to 31°F |
|
Ice Termination Setpoint: Tracer |
Numeric |
This setpoint is the primary control value for the chiller in Ice Making mode. Once the chilled water temp reaches the Ice termination setpoint, all compressors are shut off and held off until ice making is turned off. Range: 20 to 31°F. |
|
Last Control Date Time |
Date/Time Numeric |
This indicates the date and time when the present value property of this object was last controlled. |
|
Lead Lag Selection |
Binary |
If Ckt 1 lead is selected, the UCM will prefer to start compressors on circuit 1. If Auto, the UCM will try to balance compressor operation by alternating which circuit starts first. This property is ignored when Hot Gas Bypass is enabled. 0=CKT 1 LEAD, 1=AUTO. |
|
Maximum Capacity |
Binary |
Max capacity means that the chiller is running all the compressors are enabled (or not locked out due to diagnostic). 0=NOT AT MAX CAPACITY, 1=CHILLER RUNNING AT MAX CAPACITY. |
|
Mech Cooling Control: Ref |
Referencer |
Feeds the Comp Number Enabled: Tracer. (Auto=4, Disable=0). 0=DISABLE, 1=AUTO. |
|
Minimum Off Time |
Numeric |
This property is the minimum off time assigned to the UCM being represented. This value serves to protect the hardware from cycle times which might harm the hardware. |
|
Minimum On Time |
Numeric |
This property is the minimum on time assigned to the UCM being represented. This value serves to protect the hardware from cycle times which might harm the hardware. |
|
Minimum Time Remaining |
Numeric |
This property is the minimum time remaining (if any) of a minimum On/Off time control action for the represented UCM device. |
|
Mode: System Status |
Binary |
Auto means that the UCM is not inhibited from running by the front panel. 0=STOP/RESET, 1=AUTO. |
|
Object Identifier |
Object ID |
This property allows the assignment of a unique printable name to the object for user identification. |
|
Object Type |
Multi-State |
This property designates the object’s type (i.e., analog input, binary input, TCM, PCM, etc.). |
|
Operating Mode: Unit |
Multi-State |
0=Stop |
|
Outdoor Air Temperature: Input |
Numeric |
This property is used for condenser fan control on CGA units or for outdoor air based reset. Range: -40 to 170° F. |
|
Over Under Volt Protect Select |
Binary |
High and low voltage protections are enabled in this property. High voltage is activated (must trip) at line voltage+15 percent of nominal unit voltage. "Must hold" is +10 percent of nominal unit voltage. Low voltage is activated at line voltage-15 percent. "Must hold" is +10 percent of nominal unit voltage. 0=DISABLED, 1=ENABLED. |
|
Present Value |
Multi-State |
This property is used to control the unit to one of nine standard operation modes. These modes are defined as UNOCCUPIED, OPTIMAL START, OCCUPIED, OPTIMAL STOP, DEMAND LIMIT, DUTY CYCLE, PRIORITY SHUTDOWN, NIGHT ECONOMIZE, and NIGHT HEAT-COOL. A translation (within the BCU) may take place to map these modes into a simpler mode set. |
|
UCM Command |
Multi-State |
Password Protected Features. |
|
UCM Nonvolatile Memory Failure |
Binary |
This property indicates the active error status of the UCM NOVRAM/BBRAM data. When present, this diagnostic indicates the UCM has been unable to recall its remote setpoints from non-volatile storage, and requires a download of control information. This diagnostic is an auto reset diagnostic. 0=DATA OK, 1=DATA ERROR. |
|
Unit Configuration |
Multi-State |
CGW means interlocked Water-Cooled (WC). CGA means Fan controlled air-cooled. 20 to 30 ton models have 2 compressors, 40 to 60 ton models have 4 compressors.0=CGWD 20 to 30 Ton1=CGWD 40 to 60 Ton2=CGAD 20 to 30 Ton3=CGAD 40 to 60 Ton |
|
Unit Control Source |
Multi-State |
Stop means that the unit is not able to run. Local means that only front panel values are in use. Remote means that a Tracer is in control with either "Tracer" or "Comm Loss" values. 0=STOP, 1=LOCAL, 2=REMOTE |
|
Update Tag |
Numeric |
Object instance update tag. This tag is used to indicate that the nonvolatile memory resident data within the particular instance has changed. The workstation is the primary user of this property. |
|
Zone Temperature |
Numeric |
Used only for zone based reset. This value will probably not be present when zone based reset is not enabled. Range: 55 to 85° F. |