Table of Contents
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MODB-I-O_100161545_2000014822_Rev M
MODBUS AND BACNET
COMMUNICATION
INSTRUCTIONS
Knight 81 - 286, Knight XL 400 - 801,
Armor 151 - 801, Outdoor Knight 151
- 286, Outdoor Knight XL 400 - 801,
Outdoor Armor 151 - 801,
AQUAS 400 - 801, FTXL 400 - 850,
Wall Mount 51 - 211, Wall Hung 55 -
399, and Wall Mount Armor 125 - 200
WARNING
Models:
Th is manual must only be used by a
qualifi ed heating installer / service
technician. Read all instructions,
including this manual, the Installation
and Operation Manual, and the Service
Manual, before installing. Perform
steps in the order given. Failure to
comply could result in severe personal
injury, death, or substantial property
damage.
Save this manual for future reference.
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Table of Contents
Related Manuals for Lochinvar Knight 81
Summary of Contents for Lochinvar Knight 81
- Page 1 MODBUS AND BACNET COMMUNICATION INSTRUCTIONS Models: Knight 81 - 286, Knight XL 400 - 801, Armor 151 - 801, Outdoor Knight 151 - 286, Outdoor Knight XL 400 - 801, Outdoor Armor 151 - 801, AQUAS 400 - 801, FTXL 400 - 850,...
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Page 2: Table Of Contents
Th e information contained in this manual provides general guidelines for the implementation of ModBus and BACnet communication with the Lochinvar Armor water heaters (151 - 801), Wall Mount Armor (125-200), Knight (81-286), Knight XL (400 - 801), Outdoor Knight (151-286), Outdoor KnightXL (400-801), Outdoor Armor (151-801), Wall Mount (51 - 211), and Wall Hung (55 - 399) boilers. -
Page 3: Installation
ModBus and BACnet Communication Instructions Installation Installation procedure - for Models WB, Figure 2-2a_Attach Cover to Communication Board for WA, AW, KB, OA, OK and KBX Models WB, WA, AW, KB and KBX Turn OFF the main electrical power to the appliance. MODBUS ASSEMBLY Turn OFF the main manual gas shutoff to the appliance. - Page 4 ModBus and BACnet Communication Instructions Installation Figure 2-4_Harness Connections_WB, WA, AW, KB, KBX, OA, and OK models FROM POWER TO TRANSFORMER HARNESS ROUTE THROUGH JACKET HARNESS CLIPS USE SUPPLIED CABLE TIE TO CONNECT MODBUS POWER HARNESS TO BLOWER POWER WIRES (RED, WHITE, GREEN) Figure 2-5_Connect Communication Board to Control Board LOW VOLTAGE CONNECTION BOARD...
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Page 5: Ftxl
ModBus and BACnet Communication Instructions Installation (continued) ModBus installation procedure - for FTXL Models Figure 2-6a_Assemble ModBus Control Board for FTXL Figure 2-6b_Secure Control Board to FTXL Unit 2X RIVET 4X LOCKNUT 2X CLIP 4X ALUMINUM SPACER SECURE CONNECTION BOARD W/ 5X CLIPS IMG01107 MODBUS Turn OFF the main electrical power to the appliance. -
Page 6: Wall Hung
ModBus and BACnet Communication Instructions Installation Installation Procedure - for WH Models Figure 2-6_Assemble Communication Board_WH Turn OFF the main electrical power to the appliance. INSERT STANDOFFS Turn OFF the main manual gas shutoff to the appliance. To assemble the communication board to the sheet metal, insert four (4) standoff s into the front access panel (FIG. -
Page 7: Modbus Configuration
ModBus and BACnet Communication Instructions ModBus Confi guration Th e ModBus communication board is equipped with a set of ten dip switches that are used to set the board confi guration (address, baud rate, and parity settings). Th e fi rst eight are used to set the address of each board. Th e ninth is baud rate. Th e tenth is parity. -
Page 8: Timing Specifi Cations
RTU has been chosen to be used 0 = 9600 bps with all Lochinvar ModBus communication. Please ensure that the master device is transmitting ModBus RTU. Each message is started by at least 3.5 character times of silence. -
Page 9: Modbus Function Set
ModBus and BACnet Communication Instructions ModBus Confi guration (continued) ModBus Function Set Function Sub Function Description Read Coil Status Read Input Status Read Holding Registers Read Input Registers Force Single Coil Preset Single Register Read Exception Status Diagnostic - Return Query Data Diagnostic - Restart Communication Diagnostic - Return Diagnostic Register Diagnostic - Force Listen Mode... -
Page 10: Modbus Exception Codes
ModBus and BACnet Communication Instructions ModBus Confi guration ModBus Exception Codes MODBUS Exception Codes Code Name Meaning The function code received in the query is not an allowable action for the server (or slave). This may be because the function code is only applicable to newer ILLEGAL FUNCTION devices, and was not implemented in the unit selected. -
Page 11: Modbus Memory Map Primary Data Tables
ModBus and BACnet Communication Instructions ModBus Memory Map Primary Data Tables Table Data Type Read / Write Discrete Inputs Single Bit Read Only Coils Single Bit Read / Write Input Registers 16-Bit Word Read Only Holding Registers 16 Bit Word Read / Write Memory Map Coils... -
Page 12: Input Registers
ModBus and BACnet Communication Instructions ModBus Memory Map Memory Map Input Registers Address Description Default Unit Min. Max. Resolution 30001 Discrete Inputs 1 - 16 65535 30002 Discrete Inputs 17 - 32 65535 30003 Discrete Inputs 33 - 48 65535 30004 System / Cascade Setpoint Degrees Celsius... -
Page 13: Bacnet Configuration
ModBus and BACnet Communication Instructions Modbus Instructions BACNET Confi guration Th e BACnet communication board is equipped with a set of ten dip switches that are used to set the board confi guration (address and baud rate). Th e fi rst eight are used to set the address of each board. Th e ninth and tenth are baud rate. Figure 5-1_Communication Board DIP SWITCHES LED’S... -
Page 14: Timing Specifi Cations
Modbus Instructions ModBus and BACnet Communication Instructions BACnet Confi guration Timing Specifi cations Communication Board Diagnostics Th e Communication board is equipped with three LED’s for Th e baud rate for the BACnet board is selectable with Dip visual diagnostics: Two yellow LED’s and one green. One switches #9 and #10. -
Page 15: Bacnet Memory Map Primary Data Tables
ModBus and BACnet Communication Instructions BACnet Memory Map Primary Data Tables Object Type Data Type Read / Write Binary Input (BI) Single Bit Read Only Binary Value (BV) Single Bit Read / Write Analog Input (AI) 16-Bit Word Read Only Analog Value (AV) 16 Bit Word Read / Write... -
Page 16: Holding Registers
ModBus and BACnet Communication Instructions Modbus Instructions Wiring Requirements BACnet Memory Map (continued) Memory Map (continued) Object Object Object Name Units Resolution Type Instance Flue Temperature Deg C Firing Rate Percent Boiler Pump Speed Percent Boiler Status Code none 65535 Boiler Blocking Code none 65535... -
Page 17: Physical Wiring
Modbus Instructions ModBus and BACnet Communication Instructions Wiring Requirements Note that when the System Supply Temperature and/or the Tank Temperature are provided by the BAS, they need to be refreshed every few seconds. Th is is required in order to prevent unwanted fl uctuations in these temperatures. If these values are not provided every few seconds (timeout is programmable), the boiler will revert to its own internal control. -
Page 18: Control Inputs/Outputs
ModBus and BACnet Communication Instructions Wiring Requirements Figure 7-2_Control Inputs SYSTEM PUMP SPEED CONTROL GAS PRESSURE SWITCH DHW THERMOSTAT ROOM THERMOSTAT / ZONE CONTROL LOW VOLTAGE CONNECTION FLOW SWITCH BOARD SYSTEM SENSOR OUTDOOR SENSOR SEQUENCER / BUILDING MANAGMENT SYSTEM LOW WATER CUTOFF MODBUS/BACNET COMMUNICATION BOARD... - Page 19 ModBus and BACnet Communication Instructions Wiring Requirements (continued) Figure 7-3_Control Outputs ALARM BELL LOW VOLTAGE LOUVER RELAY CONNECTION BOARD RUN TIME CONTACTS BUILDING MANAGEMENT SYSTEM BOILER PUMP SYSTEM PUMP DHW PUMP IGNITOR BLOWER SMART CONTROL MODULE GAS VALVE DISPLAY PANEL PC INTERFACE...
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Page 20: Control Location
ModBus and BACnet Communication Instructions Wiring Requirements Figure 7-4_Control Location_Knight , Knight XL and Figure 7-5_Control Location_Outdoor Knight, Outdoor Armor Knight XL, Outdoor Armor CONTROL, INTEGRATED MODBUS / BACNET COMMUNICATION BOARD HEAT EXCHANGER Figure 7-6_Control Location_Knight/Armor Wall Mount Figure 7-7_Control Location_Knight Wall Hung HEAT EXCHANGER HEAT EXCHANGER MODBUS / BACNET... - Page 21 ModBus and BACnet Communication Instructions Wiring Requirements (continued) Figure 7-8_Control Location_FTXL MODBUS COMMUNICATION BOARD INTEGRATED CONTROL BOARD HEAT EXCHANGER IMG01112...
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Page 22: Typical Boiler/Water Heater System Wiring
ModBus and BACnet Communication Instructions Wiring Requirements Typical Boiler/Water Heater System Wiring Physical Configuration: Cascade without Individual Monitoring Modbus / BACnet RS485 Port on Gateway or Building System Modbus / BACnet RS485 Communication Bus LEADER MEMBER 2 MEMBER 3 MEMBER 1 Cascade Daisy Chain Connection NOTICE You will need a Modbus or BACnet board only for the Leader. -
Page 23: Unit Operation
BMS communication be interrupted longer than the ModBus timer. Th e timer is reset every time a write command is received with updated temperatures or commands. It is the recommendation of Lochinvar that this timer be set to the shortest value possible. - Page 24 ModBus and BACnet Communication Instructions Unit Operation Control Mode 1 - Set-up (Confi guration Parameters) BMS Type default (FIG. 6-3) remains. Object Holding Registers Defi nition Bit Value (HEX) Action 40001 Confi guration 00 01 Set Confi guration to read 40002 40002 Coils / BV 00 01...
- Page 25 ModBus and BACnet Communication Instructions Unit Operation (continued) Control Mode 2 - Set-up (Command Parameters) (continued) Th e holding registers/objects will need to be set as follows: Object Holding Registers Defi nition Bit Value (HEX) Action 40001 Confi guration 00 05 Set Confi guration to read 40002 &...
- Page 26 ModBus and BACnet Communication Instructions Unit Operation Control Mode 4 (DHW) Domestic Hot Water Generation (DHW) can be accomplished with one of two methods when a boiler/water heater is connected to a BAS system, DHW with direct control, and DHW with remote control. DHW with direct control: Th is is a typical installation with a hot water generator in close proximity to the boiler/water heater with the tank thermostat or the tank temperature sensor wired to the terminal strip of the unit.
- Page 27 ModBus and BACnet Communication Instructions Unit Operation (continued) Cascade DEFAULT DEFAULT VALUES PARAMETER In order to operate the boiler/water heater in Cascade with ModBus or BACnet communications, confi gure the Leader Deg C Deg F Voltages unit per the control modes in this manual. Connect the BMS temperature set point at remaining boilers/water heaters in the Cascade through low analog input...
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Page 28: Communications
ModBus and BACnet Communication Instructions Troubleshooting Status Codes (Input Register 30014 or Analog Input AI13) Should you encounter problems communicating over ModBus, the following items should be checked in this order: 2 = Heat Demand blocked due to high absolute outlet Physical Layer temperature Communications Confi guration and Port Settings... - Page 29 (Input Register 30014 or AI13) indicates a code of 40. 161 = EEPROM code Parameters not Re-Programmed by Lochinvar 164 = EEPROM code No Reset Allowed (> 15 minutes) 166 = EEPROM code Auto Reset High Limit...
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Page 30: Diagrams
ModBus and BACnet Communication Instructions Diagrams Figure 10-1 Ladder Diagram_Knight/Knight Wall Mount JUNCTION BOX 120VAC NEUTRAL GROUND TERMINAL STRIP TERMINAL STRIP 120V SUPPLY "L" 120V SUPPLY "N" ON / OFF INTEGRATED CONTROL BLOWER SWITCH SYSTEM X1-1 SYSTEM X1-6 PUMP "L" PUMP "N"... - Page 31 ModBus and BACnet Communication Instructions Diagrams (continued) Figure 10-2 Wiring Diagram_Knight/Knight Wall Mount LOW VOLTAGE BOX DEPICTS 120 VAC OPTIONAL ITEMS HIGH VOLTAGE BOX DEPICTS DUAL SENSOR SINGLE HOUSING INTEGRATED CONNECTION BOARD BOX DEPICTS CONTROL JUNCTION OPTIONAL ITEMS ALARM X1-3 CONTACTS PUMP RUN-TIME...
- Page 32 ModBus and BACnet Communication Instructions Diagrams Figure 10-3 Ladder Diagram_Knight XL JUNCTION BOX 120VAC NEUTRAL TERMINAL STRIP TERMINAL STRIP 120V SUPPLY "L" 120V SUPPLY "N" GROUND SYSTEM INTEGRATED CONTROL PUMP ON / OFF CONTACTS SWITCH BLOWER X1-6 X1-1 3.15A SYSTEM PUMP BOILER X1-2...
- Page 33 ModBus and BACnet Communication Instructions Diagrams (continued) Figure 10-4 Wiring Diagram_Knight XL LOW VOLTAGE BOX DEPICTS 120 VAC OPTIONAL ITEMS HIGH VOLTAGE BOX DEPICTS DUAL SENSOR SINGLE HOUSING INTEGRATED CONNECTION BOARD CONTROL ALARM JUNCTION RELAY CONTACTS BOARD PUMP RUN-TIME CONTACTS X1-3 CN2-4 CN1-5...
- Page 34 ModBus and BACnet Communication Instructions Diagrams Figure 10-5 Ladder Diagram_Armor / Armor Wall Mount JUNCTION BOX 120VAC NEUTRAL GROUND TERMINAL STRIP TERMINAL STRIP 120V SUPPLY "L" 120V SUPPLY "N" INTEGRATED CONTROL ON / OFF BLOWER SWITCH SYSTEM X1-1 SYSTEM X1-6 PUMP "L"...
- Page 35 ModBus and BACnet Communication Instructions Diagrams (continued) Figure 10-6 Wiring Diagram_Armor / Armor Wall Mount LOW VOLTAGE BOX DEPICTS 120 VAC OPTIONAL ITEMS HIGH VOLTAGE BOX DEPICTS DUAL SENSOR SINGLE HOUSING INTEGRATED CONNECTION BOARD CONTROL JUNCTION ALARM X1-3 OR/BK CONTACTS RUN-TIME PUMP CONTACTS...
- Page 36 ModBus and BACnet Communication Instructions Diagrams Figure 10-7 Ladder Diagram_Wall Hung 120VAC JUNCTION BOX NEUTRAL GROUND TERMINAL STRIP TERMINAL STRIP 120V SUPPLY "L" 120V SUPPLY "N" INTEGRATED CONTROL BLOWER ON / OFF KB ONLY SWITCH SYSTEM SYSTEM X1-6 X1-1 PUMP "L" PUMP "N"...
- Page 37 ModBus and BACnet Communication Instructions Diagrams (continued) Figure 10-8 Wiring Diagram_Wall Hung LOW VOLTAGE BOX DEPICTS 120 VAC OPTIONAL ITEMS HIGH VOLTAGE BOX DEPICTS DUAL SENSOR SINGLE HOUSING INTEGRATED BOX DEPICTS CONNECTION BOARD CONTROL JUNCTION OPTIONAL ITEMS ALARM X1-3 CONTACTS PUMP RUN-TIME CONTACTS...
- Page 38 ModBus and BACnet Communication Instructions Diagrams Figure 10-9 Wiring Diagram_FTXL LOW VOLTAGE 120 VAC BOX DEPICTS OPTIONAL ITEMS HIGH VOLTAGE CONXUS BOX DEPICTS DUAL SENSOR SINGLE HOUSING RIBBON CABLE INTEGRATED CONNECTION BOARD CONTROL JUNCTION RELAY BOARD PUMP DAMPER FLUE DAMPER X1-3 CN2-4 CN1-5...
- Page 39 ModBus and BACnet Communication Instructions Diagrams (continued) Figure 10-10 Ladder Diagram_FTXL JUNCTION BOX 120VAC NEUTRAL TERMINAL STRIP TERMINAL STRIP 120V SUPPLY "L" 120V SUPPLY "N" BLOWER BLOWER GROUND RELAY SYSTEM ON / OFF PUMP SWITCH INTEGRATED CONTROL CONTACTS X1-1 X1-6 3.15A BLOWER SYSTEM...
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Page 40: Revision Notes
Revision Notes: Revision A (ECO #C06020) initial release. Revision B (ECO #C06188) refl ects updates made to the ladder and wiring diagrams (ECO #C06158). Revision C (ECO C07191) refl ects the correction information in the Parity section on page 4. Revision D (ECO C07281) refl...