Carrier 48TCA04---A12 Modbus, Manufacture Date, Basic Protocol Troubleshooting, Code Name Meaning

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48TC

Table 24 – Manufacture Date

When troubleshooting, you may need to know a control module’s manufacture date

Obtain the manufacture date from

Notes

 

a...

 

 

Module status report (modstat)

To obtain a modstat with BACview6:

 

1. Press Function (FN) key and hold.

 

2. Then press period (.)

 

3. Release both buttons.

 

The report shows the date under Main board hardware.

Sticker on the back of the main control

The serial numbers are unique and contain embedded information:

module board

“RMP”

--- These first three digits are unique to RTU---MP and are used as an identifier.

”Serial No: RMPYMxxxxN”

“YM”

--- These two digits identify the last digit of the year and month (in hex, A=10/Oct)

(Bar Coded & Typed Number)

“xxxx”

of manufacture. ”74” would represent a date of manufacture of ”April 2007”.

 

--- These four digits represent the sequential number of units produced for a given

 

“N”

product for the mentioned manufacturing time period.

 

--- This final digit represents the decade and toggles between ”N” and ”M” every

 

 

ten years.

Table 25 – Basic Protocol Troubleshooting

Problem

Possible cause

Corrective action

No communication with 3rd

Incorrect settings on SW1, SW2 and SW3

Verify and correct switch settings. Cycle

party vendor

 

power to RTU---MP after changing switch

 

 

settings.

 

RS485 Port has no voltage output

Verify RTU---MP has correct power supply

 

(check with RTU---MP disconnected from RS485 commu-

Possible bad driver on board.

 

nication bus)

 

 

Bacnet @ 9600/19.2K --- .01 to .045vdc

Check RS485 bus for external before re-

 

 

connecting to the bus

 

Bacnet @ 38.4K --- .06 to .09vdc

Voltage, shorts or grounding

 

Bacnet @ 76.8K --- .1vdc

before reconnecting to the bus

 

Modbus @ 9600 --- 76.8K --- .124vdc

 

 

N2 @ 9600 --- .124vdc

 

 

Verify devices are daisy chained and repeaters and bias

Check 3rd party vendor RS485 commu-

 

terminators are correctly installed

nication wiring guidelines and trouble-

 

 

shooting procedures

S MaxInfo Frames: This property defines the maximum number of responses that will be sent when our controller gets the token. A valid number is any positive integer. The default is 10 and should be ideal for the majority of applications. In cases where the controller is the target of many requests, this number could be increased as high as 100 or 200.

NOTE: MS/TP networks can be comprised of both Master and Slave nodes. Valid MAC addresses for Master nodes are 0 - 127 and valid addresses for Slave nodes are 0 - 254.

NOTE: See RTU-MP 3rd Party Integration Guide (or alternatively Form 48-50H-T-1T Appendix) for Protocol Maps.

Table 26 – Modbus Exception Codes that May be

Returned From This Controller

CODE

NAME

MEANING

 

 

 

 

 

The Modbus function code used

01

Illegal Function

in the query is not supported by

 

 

the controller.

 

 

 

 

 

The register address used in the

02

Illegal Data Address

query is not supported by the

 

 

controller.

 

 

 

 

 

The Modbus Master has at-

04

Slave Device Failure

tempted to write to a non---exist-

 

 

ent register or a read---only regis-

 

 

ter in the controller.

 

 

 

Modbus

1.Verify that the BAS and controller are both set to speak the Modbus RTU protocol. The protocol of the controller is set via SW3 (switches 3, 4, 5, and 6). The protocol can also be verified by getting a Modstat of the controller through the BACview. Hit the ”FN” key and the ’.’ key at the same time to pull up a Modstat. Scroll to the bottom of the page and there is a section entitled “Network Communications.” The active protocol and baud rate will be shown in this section.

2.Verify that the BAS and controller are set for the same baud rate. The baud rate of the controller is set via SW3 (switches 1 and 2). The baud rate can also be verified via the BACview by obtaining a Modstat (see above).

3.Verify that the BAS is configured to speak 2-wire EIA-485 to the controller. The BAS may have to con- figure jumper or DIP switches on their end.

4.Verify that the BAS and the controller have the same communication settings (8 data bits, No Parity, and 1 stop bit).

5.Verify that the controller has a unique Modbus slave address. The controller’s Modbus slave address is set by its rotary address switches.

6.Verify that the BAS is using the proper Modbus func- tion codes to access data from our controller. Sup- ported function codes are shown above.

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Contents Table of Contents Safety ConsiderationsGeneral Unit Arrangement and AccessRoutine Maintenance What to do if you smell gasSeasonal Maintenance Supply FAN Blower Section Supply Fan Belt-DriveCondenser Coil Maintenance and Cleaning Recommendation CoolingCondenser Coil Remove Surface Loaded Fibers Periodic Clean Water RinseRoutine Cleaning of Coil Surfaces One-Row CoilEvaporator Coil Refrigerant System Pressure Access PortsCleaning the Evaporator Coil Evaporator Coil Metering DevicesRefrigerant Charge To Use Cooling Charging ChartsPuronr R-410A Refrigerant No ChargeCooling Charging Charts Size Designation Nominal Tons ReferenceCooling Charging Charts C08229 C08437 C08438 C08439 Cooling Service Analysis Problem Cause RemedyConvenience Outlets Condenser-Fan AdjustmentTroubleshooting Cooling System CompressorController Smoke DetectorsSystem Unit Connect Primary TransformerSensor Smoke Detector LocationsCompleting Installation of Return Air Smoke Sensor Fiop Smoke Detector Wiring and ResponseController Alarm Test Sensor Alarm TestSensor Alarm Test Procedure Sensor and Controller TestsDirty Sensor Test Procedure Controller Alarm Test ProcedureDirty Controller Test Procedure To Configure the Dirty Sensor Test OperationDetector Cleaning Troubleshooting Compressor Protection Protective DevicesGAS Heating System Relief DeviceNatural Gas Manifold Pressure Ranges Fuel Types and PressuresNatural Gas Supply Line Pressure Ranges Liquid Propane Supply Line Pressure RangesFlue Gas Passageways Combustion-Air BlowerBurners and Igniters Cleaning and AdjustmentCheck Unit Operation and Make Necessary Adjust- ments Main BurnersLimit Switch Burner IgnitionOrifice Replacement LED Error Code DescriptionLED Indication Error Code Description Red LED-Status IGC Connections Orifice SizesAltitude Compensation* A04-A07 Cont. Altitude Compensation* A08-A12LP Orifice Troubleshooting Heating System Minimum heating entering air temperatureAltitude Compensation* A04-A06 Low NOx Units Heating Service Analysis Problem Cause RemedyIGC Board LED Alarm Codes IGCPremierlinkt Control PremierLink ControllerPremierLink Wiring Schematic 55 Space Temperature Sensor Wiring Space Sensor Mode PremierLink Sensor UsageThermostat Mode 56 Internal ConnectionsLctb Indoor CO2 Sensor 33ZCSENCO2 Connections PremierLink Filter Switch Connection RTU-MP Control System Recommended CablesColor Code Recommendations RTU-MP Multi-Protocol Control Board RTU-MP System Control Wiring Diagram RTU-MP Controller Inputs and Outputs OutputsSpace Temperature SPT Sensors RTU-MP T-55 Sensor ConnectionsIAQ Sensor SEN J4-2 COM J4-3 24 VAC Connecting Discrete Inputs Power Exhaust outputCommunication Wiring Protocols RTU-MP Troubleshooting LEDs LEDs on the RTU-MP show the status of certain functionsTroubleshooting Alarms Alarms BACnet MS/TPRTU-MP Driver Manufacture Date Basic Protocol TroubleshootingModbus Code Name MeaningEconomizer Systems EconoMi$er IV Component LocationsEconoMi$er IV Wiring EconoMi$er EconoMi$er IV Input/Output LogicEconoMi$er IV Control Modes Supply Air Temperature SAT SensorOutdoor Air Lockout Sensor Outdoor Dry Bulb ChangeoverReturn Air Temperature or Enthalpy Sensor Mounting Location Outdoor Enthalpy ChangeoverExhaust Setpoint Adjustment Indoor Air Quality IAQ Sensor InputMinimum Position Control Occupancy Control Damper MovementThermostats Demand Control Ventilation DCVEconoMi$er IV Preparation CO2 Sensor ConfigurationEconoMi$er IV Sensor Usage Differential EnthalpyWiring Diagrams 48TC Typical Unit Wiring Diagram Power A06, 208/230-3-60 48TC Unit Wiring Diagram Control A06 PRE-START-UP START-UP, GeneralHeating CoolingMain Burners Ventilation Continuous FanSTART-UP, RTU-MP Control Field Service TestSTART-UP, Premierlink Controls Perform System Check-OutConfiguration Space Sensor Type InputsInput Input 1 FunctionHeating, Units Without Economizer Operating SequencesBase Unit Controls Cooling, Units Without Economizer Cooling, Unit With EconoMi$erHeating With EconoMi$er PremierLink Control48TC Available Cooling Stages OAT ≤ SPT 48TC 48TC Linkage Modes Loadshed Command Gas and Electric Heat UnitsRTU-MP Sequence of Operation SchedulingBACnet Schedule Always Occupied Default OccupancyLocal Schedule BAS On/OffPower Exhaust EconomizerIndoor Air Quality Fastener Torque Values Demand LimitTorque Values Serial Number Format Appendix I. Model Number SignificanceModel Number Nomenclature Position NumberAppendix II. Physical Data Physical Data Cooling TonsPhysical Data Cooling 48TC*A08 48TC*A09 48TC*A12Physical Data Heating LOW Appendix III. FAN Performance General Fan Performance NotesTon Horizontal Supply Ton Vertical SupplyCFM RPM BHP Medium Static Option High Static Option 48TC**05 Phase Ton Horizontal Supply 48TC**051506 48TC**05 Phase Ton Vertical Supply1493 148648TC**06 148248TC**06 Phase Ton Horizontal Supply 48TC**06 Phase Ton Vertical SupplyPhase Ton Horizontal Supply 48TC**071103 1143 11071124 1122 11621116 4971099 1093 11331247 5791263 1273Pulley Adjustment Unit MOTOR/DRIVE Motor Pulley Turns Open ComboRange RLA LRA Appendix IV. Electrical DataIFM TypeAppendix IV. Electrical Data FLARLA LRA IFM RangeEFF at FullFAN Motor Exhaust Combustion PowerNOM IFM No P.E Type DISC. SizeUnbalanced 3-Phase Supply Voltage NOMAppendix V. Wiring Diagram List Wiring DiagramsAppendix VI. Motormaster Sensor Locations 48TC*A04 Outdoor Circuiting48TC*A09/12 Outdoor Circuiting Catalog No 48TC---2SMUnit START-UP Checklist Preliminary Information

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