Instruction/ maintenance manual of the product 1.0- 1.3- 1.5 Lochinvar
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SYNC-MODB Rev A Th i s m a n u a l m u s t o n l y b e u s e d b y a qualified heating installer / serv ice technician. R ead all instructions, including this manual, the Installation and Operation Man ual, and the Serv ice M anual, before installing.
2 1 Introduction The information contained in this manual pr ovides general guidelines for the implementation of Modbus comm unication with the Lochin var SYNC boiler .
3 2 Configur a tion Addr essing The Modbus addr essing space is comprised of 256 different addresss. • 0 is reserved for broadcast messages fr om the master dev ice • 1 - 247 are free t o use for each unique device • 248 - 255 are reserved T o set the M odbus address the dip switches can be set in either the 0 position or the 1 position.
4 Modbus Instructions 2 Configur a tion Timing Specifications The baud rate for the M odbus 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. The maximum delay between frames is 1.
5 2 Configur a tion (continued) Modbus Instructions Function Sub Function HEX Description Dec HEX Dec 1 01 Read Coil S tatus 2 02 Read Input S tatus 3 03 Read Holding Registers 4 04 Read Input Registe.
6 Modbus Instructions 2 Configur a tion 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.
7 Modbus Instructions Primar y Da ta T ables T able Data T ype 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 SYNC Boiler Memor y Map Coils Address Description Default Unit Min.
8 Modbus Instructions Input Registers Address Description Default Unit Min. Max. Resolution 30001 Discrete Inputs 1 - 16 0 NA 0 65535 1 30002 Discrete Inputs 17 - 32 0 NA 0 65535 1 30003 Discrete Inpu.
9 Modbus Instructions 4 W iring Requirements RS-485 Communication Bus • Maximum L ength = 4000 feet • Cable Specification = 24 A W G / A,B (twisted pair) and GND Shielded, with characteristic Impedanc e = 120 ohm • Maximum Load = 32 units (32 nodes) NOTE: Cable m ust be terminated with 120 ohm impedance matching r esistor on each end.
10 4 W iring Requirements Figure 4-2 _Control Inputs GAS PRESSURE SW ITCH ROOM THERMOST A T / ZONE CO NTROL FLOW SW ITCH SYSTEM SENSOR OUTDOOR SENSOR SEQ UENCER / B UILDI NG MANAGEME NT SYSTEM L O W V.
11 4 W iring Requirements (continued) Figure 4-3 _Control Outputs LOW VO L T A GE CONNECTION BOA RD PRIM AR Y CONTROL MO DULE ALARM BELL RUN TIME CONT ACTS SEQU ENCER / BU ILDING MANAGEM ENT SY ST EM .
12 4 W iring Requirements Figure 4-4 _Control Location CONTROLLER 1 CONTROLLER 2 MODBUS COMMUNICATI ON BOARD (MTR01) HEAT EXCHANGER 1 HEAT EXCHANGER 2 Modbus Instructions Typical Boiler System Wiring .
13 4 W iring Requirements (continued) Modbus RS4 8 5 Comm unication Bu s Modbus RS4 8 5 Po r t on Gateway o r Buildin g Syst em Physical Configuration: Direct Control Cascade Daisy Chain Connection Mo.
14 5 Unit Oper a tion Unit Operation with Modbus Communications T o control a SYNC boiler thr ough a Building Management S ystem comm unicating through Modbus, the SYNC Demand Configuration must be set to a value of 4, 5, or 6. These c onfigurations allow different c ont rol points for a variety of appli cations.
15 5 Unit Oper a tion (continued) Demand Configuration 6 In this co nfiguration the unit is controlled b y setting the modulation setpoint from 0 - 100%. Rate command will be 0 - 100% of the modulation r ange. All sensors and limiting devices should be hardwired to the terminal strip on the back of the unit ex cluding the 0 - 10Vdc sign al.
16 5 Unit Oper a tion Cascade In order t o operate the SYNC boiler in Cascade with Modbus communications, configure the leader boiler per the demand configurations in this manual. Connect the remaining boilers in the cascade through the normal cascade communications wir ing.
17 T emperature The SYNC boiler passes temperature data in degrees Celsius. Also, to acc ommodate decimal places the decimal value m ust be divided by 10. Her e are the con versions to and fr om Celsius: T c = (5/9) * (T f -32) T f = (9/5) * T c +32 Example: Outdoor temperatur e from re mote sensor on BAS S ystem = 80°F 80°F = 26.
18 6 T roubleshooting Should you enc ounter problems c ommunicating over Modbus, the following items should be checked in this or der : 1. Physical La yer 2. Communications Co nfiguration and P ort Settings 3. Modbus Error C odes 4. U nit Status / Blocking / Lockout Codes Physical Layer 1.
19 6 T roubleshooting (continued) Lockout Codes (Input Registers 30016 and 30025) 161 = EEPR OM code P arameters not R e-Pr ogrammed by Lochinvar 164 = EEPR OM code N o Reset Allowed (> 15 minutes).
20 Modbus Instructions BOX DEPICTS OPTIONAL ITEMS LADDE R DIAGRA M LBL200 58 RE V E CONTROL MODULE 2 X5-3 X2-1 GAS V ALVE GAS V ALVE RELAY X5-5 X5-13 X5-6 X5-12 1 2 4 5 TR1 X1-7 FLAME ROD SPAR K ROD 120 V AC LOW VO L TAGE HIGH VOL T AGE CAUTION HIGH VOL TA GE SP A RK LEAD BLOWER X2-2 NOTES: 1.
21 Modbus Instructions 7 Diag r ams (continued) Figure 7-2 Ladder Diagram_Part 2 BOX DEPICTS OPTIONAL ITEMS 120 VAC 24 VAC 120VAC TERMINAL STRIP 120V SUPPLY "L" ON / OFF SWIT CH X1-6 BOILER .
22 Modbus Instructions 7 Diag r ams Figure 7-3 Wiring Diagram BOX DEPICTS OPTIONAL ITEMS OUT LET SENSOR Notes: 1. All wiring mus t be installed in accordance with: local, state, provincial and nat ional code requir ements per either N. E .C. in USA o r C.
23 Notes.
Revision Notes: Revision A (ECO #C04560) initial release. SYNC-MODB Rev A 10/09.
An important point after buying a device Lochinvar 1.0- 1.3- 1.5 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Lochinvar 1.0- 1.3- 1.5 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Lochinvar 1.0- 1.3- 1.5 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Lochinvar 1.0- 1.3- 1.5 you will learn all the available features of the product, as well as information on its operation. The information that you get Lochinvar 1.0- 1.3- 1.5 will certainly help you make a decision on the purchase.
If you already are a holder of Lochinvar 1.0- 1.3- 1.5, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Lochinvar 1.0- 1.3- 1.5.
However, one of the most important roles played by the user manual is to help in solving problems with Lochinvar 1.0- 1.3- 1.5. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Lochinvar 1.0- 1.3- 1.5 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
