Lochinvar SYNC Modbus Communication 1.0- 1.3- 1.5 Manuel d'utilisateur

SYNC-MODB Rev AThis manual must only be used by aqualified heating installer / servicetechnician. Read all instructions,including this manual, theInst

104 Wiring RequirementsFigure 4-2_Control InputsGAS PRESSURE SWITCHROOM THERMOSTAT /ZONE CONTROLFLOW SWITCHSYSTEM SENSOROUTDOOR SENSORSEQUENCER / BUI

114 Wiring Requirements (continued)Figure 4-3_Control OutputsLOW VOLTAGE CONNECTIONBOARDPRIMARYCONTROL MODULEALARM BELLRUN TIME CONTACTSSEQUENCER / B

124 Wiring RequirementsFigure 4-4_Control LocationCONTROLLER 1CONTROLLER 2MODBUS COMMUNICATIONBOARD (MTR01)HEAT EXCHANGER 1HEAT EXCHANGER 2Modbus Ins

134 Wiring Requirements (continued) Modbus RS485 Communication Bus Modbus RS485 Port on Gateway or Building System Physical Configuration: Direct Co

145 Unit OperationUnit Operation with Modbus CommunicationsTo control a SYNC boiler through a Building Management System communicating through Modbus

155 Unit Operation (continued)Demand Configuration 6In this configuration the unit is controlled by setting the modulation setpoint from 0 - 100%.Rat

165 Unit OperationCascadeIn order to operate the SYNC boiler in Cascade with Modbuscommunications, configure the leader boiler per the demandconfigur

17TemperatureThe SYNC boiler passes temperature data in degrees Celsius.Also, to accommodate decimal places the decimal value must bedivided by 10.Her

186 Troubleshooting Should you encounter problems communicating overModbus, the following items should be checked in this order:1. Physical Layer2. C

196 Troubleshooting (continued)Lockout Codes (Input Registers 30016 and 30025)161 = EEPROM code Parameters not Re-Programmed by Lochinvar164 = EEPROM

21 IntroductionThe information contained in this manual provides general guidelines for the implementation of Modbus communication withthe Lochinvar

20Modbus InstructionsBOX DEPICTSOPTIONAL ITEMSLADDER DIAGRAMLBL20058 REV ECONTROLMODULE 2X5-3X2-1GAS VALVEGAS VALVERELAYX5-5X5-13X5-6X5-121245TR1X1-7F

21Modbus Instructions7 Diagrams (continued)Figure 7-2 Ladder Diagram_Part 2BOX DEPICTSOPTIONAL ITEMS120 VAC24 VAC120VACTERMINAL STRIP120V SUPPLY &quo

22Modbus Instructions7 DiagramsFigure 7-3 Wiring DiagramBOX DEPICTSOPTIONAL ITEMSOUTLETSENSORNotes:1. All wiring must be installed in accordance wit

23Notes

Revision Notes: Revision A (ECO #C04560) initial release.SYNC-MODB Rev A 10/09

32 ConfigurationAddressingThe Modbus addressing space is comprised of 256 differentaddresss.• 0 is reserved for broadcast messages from the master de

4Modbus Instructions2 ConfigurationTiming SpecificationsThe baud rate for the Modbus board is selectable with Dipswitch #9.1 = 19200 bps0 = 9600 bpsE

52 Configuration (continued)Modbus InstructionsFunction Sub FunctionHEX DescriptionDec HEX Dec1 01 Read Coil Status2 02 Read Input Status3 03 Read Ho

6Modbus Instructions2 Configuration MODBUS Exception CodesCode Name Meaning01 ILLEGAL FUNCTIONThe function code received in the query is not an allow

7Modbus InstructionsPrimary Data TablesTable Data Type Read / WriteDiscrete Inputs Single Bit Read OnlyCoils Single Bit Read / WriteInput Registers 16

8Modbus InstructionsInput RegistersAddress Description Default Unit Min. Max. Resolution30001 Discrete Inputs 1 - 16 0 NA 0 65535 130002 Discrete Inpu

9Modbus Instructions4 Wiring RequirementsRS-485 Communication Bus• Maximum Length = 4000 feet• Cable Specification = 24 AWG / A,B (twisted pair) and