Table Of Contents; Introduction; Defi Nitions; Minimum System Requirements - Lochinvar ARMOR 101 Series Instructions Manual

1. INTRODUCTION
Defi nitions .................................................................... 2
Minimum System Requirements .................................. 2
2. INSTALLATION
Defi nitions .................................................................... 2
3. MODBUS CONFIGURATION
Addressing ................................................................... 3
Timing Specifi cations ................................................... 4
Parity ............................................................................ 4
Data Transmission Mode ............................................. 4
ModBus Board Diagnostics ......................................... 4
Internal Faults ......................................................... 4
ModBus Function Set ............................................. 5
ModBus Exception Codes ........................................... 6
4. MODBUS MEMORY MAP
Primary Data Tables .................................................... . 7
Memory Map ................................................................ 7-8
Input Registers ....................................................... . 8
Holding Registers ................................................... . 8
Confi guration Bits ........................................................ . 8
1

Introduction

Th e information contained in this manual provides general guidelines for the implementation of ModBus and BACnet
communication with the Lochinvar Armor.
All ModBus networks are implemented utilizing a master-slave arrangement where all Armors are slaves and the master is a
building automation system capable of communicating over a RS-485 serial connection. BACnet networks are implemented
using a token passing protocol (MS/TP) where multiple masters and slaves share a common RS-485 bus. Th e Lochinvar BACnet
interface is a master only.
Defi nitions
Abbreviation or Acronym
ASCII
BACnet
BAS
Baud (Baud Rate)
EMS
FDX
HDX
Hex
I/O Box
LSB
ModBus®
MSB
RS232
RS485
RTU

Minimum System Requirements

•
BAS system or computer with a serial or USB port with a converter to RS-485.
2
Contents
5. BACNET CONFIGURATION
6. BACNET MEMORY MAP
7. WIRING REQUIREMENTS
8. UNIT OPERATION
9. TROUBLESHOOTING ........................................... 22-24
Revision Notes ................................................... Back Cover
American Standard Code for Information Interchange
A data communication protocol for Building Automation Control Networks
Building Automation System
Number of data bits transmitted per second (bps)
Energy Management System
Full-Duplex
Half-Duplex
Hexadecimal Number (0 - 9, A - F)
Input/Output (I/O)
Least Signifi cant Byte
A serial, half-duplex data transmission protocol developed by AEG Modicon
Most Signifi cant Byte
A standard for serial, full-duplex (FDX) transmission of data based on the
RS232 Standard
A standard for serial transmission of data based on the RS-485 Standard
Remote Terminal Unit
Addressing ................................................................... ..9
Timing Specifi cations ................................................... 10
Communication Board Diagnostics ............................. 10
Internal Faults .......................................................... 10
Primary Data Tables .................................................... .11
Appliance Map..........................................................11-12
Input Registers ............................................................ .12
Holding Registers ................................................... .12
Physical Wiring ............................................................ .13
Typical System Wiring ............................................ 16-17
Unit Operation with ModBus Communications
Meaning
•
Shielded twisted pair communication
cable.
...... 18-21