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  5. Communication Instruction Manual

Lochinvar 2072 Communication Instruction Manual

Other manuals for 2072: Service Manual
Manual is about: Copper-fin II/IIE Boiler and Water Heater

Summary of 2072

  • Page 1

    C(f,h,p)x-modb_100160882_2000001229_rev e 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 t...

  • Page 2: Contents

    Contents 1. Introduction defi nitions .................................................................... 2 minimum system requirements .................................. 2 2. Modbus configuration addressing ................................................................... 3 timing specifi cation...

  • Page 3: Modbus Confi Guration

    3 2 modbus confi guration addressing th e modbus addressing space is comprised of 256 diff erent addresses. • 0 is reserved for broadcast messages from the master device • 1 - 247 are free to use for each unique device • 248 - 255 are reserved to set the modbus address the dip switches can be set in...

  • Page 4: Modbus Confi Guration

    4 2 modbus confi guration timing specifi cations th e baud rate for the modbus board is selectable with dip switch #9. 1 = 19200 bps 0 = 9600 bps each message is started by at least 3.5 character times of silence. Th e maximum delay between frames is 1.5 character times. When the system temperature,...

  • Page 5: Modbus Confi Guration

    5 2 modbus confi guration (continued) function sub function hex description dec hex dec 1 01 read coil status 2 02 read input status 3 03 read holding registers 4 04 read input registers 5 05 force single coil 6 06 preset single register 7 07 read exception status 8 08 0 00 diagnostic - return query...

  • Page 6: Modbus Confi Guration

    6 2 modbus confi guration modbus exception codes code name meaning 01 illegal function 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 devices, and was not implemented in the unit selected...

  • Page 7: Modbus Memory Map

    7 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 copper-fi n ii/iie memory map 3 modbus memory map address description default unit min. Max. Resoluti...

  • Page 8: Modbus Memory Map

    8 copper-fi n ii/iie memory map 3 modbus memory map confi guration bits address 40001 contains confi guration bits sent from the bas to the boiler. Th ese bits tell the boiler to use its own internal inputs, or inputs from the bas. When a bit is set to 1, the boiler will ignore the corresponding val...

  • Page 9: Bacnet Confi Guration

    9 4 bacnet confi guration copper-fi n ii/iie modbus and bacnet manual address = value of dip switch 1 + value of dip switch 2 + value of dip switch 3 + value of dip switch 4 + value of dip switch 5 + value of dip switch 6 + value of dip switch 7 + value of dip switch 8 in this example: address = 0 +...

  • Page 10: Bacnet Confi Guration

    10 10 4 bacnet confi guration copper-fi n ii/iie modbus and bacnet manual timing specifi cations th e baud rate for the bacnet board is selectable with dip switches #9 and #10. Communication board diagnostics th e communication board is equipped with three led’s for visual diagnostics: two yellow le...

  • Page 11: Bacnet Memory Map

    Object name object type object instance units min max resolution binary values stage 1 enable bv 0 none 0 1 1 stage 2 enable bv 1 none 0 1 1 stage 3 enable bv 2 none 0 1 1 stage 4 enable bv 3 none 0 1 1 tank thermostat bv 4 none 0 1 1 binary inputs high limits bi 0 none 0 1 1 flow switch bi 1 none 0...

  • Page 12: Wiring Requirements

    12 copper-fi n ii/iie modbus and bacnet manual 4 wiring requirements (continued) 5 bacnet memory map object name object type object instance units min max resolution analog inputs binary inputs 0 - 15 ai 0 none 0 65535 1 binary inputs 16 - 31 ai 1 none 0 65535 1 discrete inputs 32 - 47 ai 2 none 0 6...

  • Page 13: Wiring Requirements

    13 copper-fi n ii/iie modbus and bacnet manual 6 wiring requirements mounting/wiring instructions 1. Turn off power at the source. 2. Remove the left and right access panels to access the inside of the unit. 3. Mount the communication board as shown in fig. 6-1. - set dip switch settings (reference ...

  • Page 14: Wiring Requirements

    14 copper-fi n ii/iie modbus and bacnet manual 6 wiring requirements cascade modbus cn1 cn 6 cn 2 tan k se n s o r shi e l d a b shi e l d + 0 -10v - bm s i n + 0 -10v - r a t e o u t shi e l d a b shi e l d 35 34 33 32 31 30 29 28 27 26 25 24 23 22 a3 a1 a2 a4 a5 a6 a7 co nn e c t io n boar d dig i...

  • Page 15: Wiring Requirements

    15 copper-fi n ii/iie modbus and bacnet manual 6 wiring requirements (continued) rs-485 communication bus • maximum length = 4000 feet • cable specifi cation = 24 awg / a,b (twisted pair) and gnd shielded, with characteristic impedance = 120 ohm • maximum load = 32 units (32 nodes) note: cable must ...

  • Page 16: Wiring Requirements

    16 copper-fi n ii/iie modbus and bacnet manual 6 wiring requirements figure 6-4 _control inputs smart system control board low voltage connection board dhw thermostat (optional) room thermostat/ zone control (optional) system supply/ enable sensor (optional) system return/ pool sensor (optional on b...

  • Page 17: Wiring Requirements

    17 copper-fi n ii/iie modbus and bacnet manual 6 wiring requirements (continued) figure 6-5 _control outputs smart system control board low voltage connection board three way valve (optional on boiler) (std on pool heater) louver relay building management system run time contacts alarm contacts alar...

  • Page 18: Wiring Requirements

    18 copper-fi n ii/iie modbus and bacnet manual 6 wiring requirements figure 4-6 _control location communication board control panel models 402 - 752 communication board control panel models 992 - 2072 connection board connection board typical boiler system wiring bacnet or modbus rs485 communication...

  • Page 19: Wiring Requirements

    19 copper-fi n ii/iie modbus and bacnet manual 6 wiring requirements (continued) bacnet or modbus rs485 communication bus physical configuration: direct control bacnet or modbus rs485 port on building system bacnet or modbus rs485 communication bus bacnet or modbus rs485 port on gateway or building ...

  • Page 20: Unit Operation

    20 copper-fi n ii/iie modbus and bacnet manual 7 unit operation unit operation with modbus / bacnet communications a building automation system (bas) can monitor the copper-fi n ii/iie without the need to change the default confi guration of the smart system control. When the bas is to provide comma...

  • Page 21: Unit Operation

    21 copper-fi n ii/iie modbus and bacnet manual 7 unit operation (continued) control mode 3 in this confi guration, the heater receives its enable signal and a rate command through modbus or bacnet. All sensors and limiting devices should be connected directly to the terminal strip(s) inside the copp...

  • Page 22: Unit Operation

    22 copper-fi n ii/iie modbus and bacnet manual 7 unit operation dhw with remote control: th is installation may or may not have the hot water generator in close proximity to the boiler. Its sensors and thermostat values are only available through the modbus or bacnet communication bus. To ensure tha...

  • Page 23: Unit Operation

    Copper-fi n ii/iie modbus and bacnet manual cascade in order to operate the copper-fi n ii/iie in cascade with modbus or bacnet communications, confi gure the leader boiler per the demand confi gurations in this manual. Connect the remaining boilers in the cascade through the normal cascade communic...

  • Page 24: Troubleshooting

    24 copper-fi n ii/iie modbus and bacnet manual 8 troubleshooting should you encounter problems communicating over modbus, the following items should be checked in this order: 1. Physical layer 2. Communications confi guration and port settings 3. Modbus error codes 4. Unit status / blocking / lockou...

  • Page 25: Troubleshooting

    25 copper-fi n ii/iie modbus and bacnet manual 8 troubleshooting (continued) lockout codes (input register 30016) 161 = eeprom code parameters not re-programmed by lochinvar 164 = eeprom code no reset allowed (> 15 minutes) 166 = eeprom code auto reset high limit 167 = eeprom code blocked drain 168 ...

  • Page 26: Diagrams

    26 copper-fi n ii/iie modbus and bacnet manual 9 diagrams figure 9-1 ladder diagram bl o w er n o n /o ff s w itc h f2 3. 1 5 a bo x depi ct s op t ion a l i t e m s 12 0 vac lo w vol t age ter m in al st ri p bl o w er rel a y hi/l o spee d rel a y hi/l o spee d rel a y hi g h spee d lo w speed g l...

  • Page 27: Diagrams

    27 copper-fi n ii/iie modbus and bacnet manual 9 diagrams (continued) figure 9-1 ladder diagram cont’d c n 5- 11 x6 -1 x6 -1 3 cn5 -5 lo u v e r r e la y cn 4 -5 x3 -1 cn 4 -6 x3 -2 co nn e c t io n b o a r d 1 x6 -7 cn5 -1 r unt im e co n t a c t s x6 -1 6 cn5 -7 x6 -2 cn5 -8 x1 3 -1 cn5 -9 x6 -6 c...

  • Page 28: Diagrams

    Copper-fi n ii/iie modbus and bacnet manual 9 diagrams figure 9-2 connection diagram + + + + + + + + outdoor sensor sys return sensor sys supply sensor 0-10v sys - pump in cn2 1 2 3 4 5 6 7 8 field supplied wiring + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + alarm contacts o...

  • Page 29: Diagrams

    Copper-fi n ii/iie modbus and bacnet manual 9 diagrams (continued) figure 9-2 connection diagram cont’d note: number of gas valves varies by model ground x11 x4 x9 x5 x6 x7 x8 x13 f2 f4 main unit 1 18 2 3 5 6 20 19 17 16 12 7 15 14 y t w gy bl y/g br/w bl bk/r r/bk bl/bk br bk 1 r/bk 4 8 o/r pr 1 12...

  • Page 30: Notes

    30 copper-fi n ii/iie modbus and bacnet manual notes.

  • Page 31: Notes

    31 copper-fi n ii/iie modbus and bacnet manual notes.

  • Page 32

    Revision notes: revision a (eco #c08638) initial release. Revision b (eco c11616) refl ects the addition of the lockout code notice on page 21 (r05772). Revision c (pcp# 3000002377 / cn# 500002607) refl ects the addition of bacnet information and images, edits made to wording of timing specifi catio...