Contents
Main
MODBUS COMMUNICATION INSTRUCTIONS
SYNC Models: 1.0 - 1.3 - 1.5
1
Contents
Abbreviation or Acronym Meaning
Definitions
Minimum System Requirements
Addressing
DIP SWITCHES
LEDS
Timing Specifications
Parity
Data Transmission Mode
Modbus Board Diagnostics
Modbus Communication
2
Modbus Function Set
Function Sub Function HEX Description Dec HEX Dec
Modbus Exception Codes
MODBUS Exception Codes Code Name Meaning
3
Primary Data Tables
Table Data Type Read / Write
SYNC Boiler Memory Map
3
Configuration Bits
Physical Wiring
Figure 4-1_Terminal Strip Connections
Figure 4-2_Control Inputs
LOW VO LTAGE CONNECTION BOARD
SECONDARY SMART TOUCH CONTROL MODULE PRIMARY SMART TOUCH CONTROL MODULE
4
Typical Boiler System Wiring
Page
5
Unit Operation with Modbus Communications
Demand Configuration 4
5
Demand Configuration 6
Hot Water Generation
Demand Configuration 5
5
Cascade
5
Decimal Binary HEX
Rate and Temperature Conversions:
Rate % HEX
6
Physical Layer
Communications
Modbus Error Codes
Unit Status Codes
6
Installation / Replacement Procedure
BOX DEPICTS OPTIONAL ITEMS
120 VAC
X4 X4
7
Figure 7-1 Ladder Diagram_Part 1
7
Figure 7-2 Ladder Diagram_Part 2
120 VAC
BOX DEPICTS OPTIONAL ITEMS
LOW VOLTAGE HIGH VOLTAGE
7
Figure 7-3 Wiring Diagram
120 VAC
CAUTION HIGH VOLTAGE SPARK LEAD
CONNECTION BOARD
