AERCO Modbus Communications Manual - Manual (Page 7)

Chapter 1
MODBUS
Communication GF-114
Introduction & Description USER MANUAL OMM-0035_0C
05/18/12 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 Page 7 of 200
CHAPTER 1. INTRODUCTION AND GENERAL
DESCRIPTION
1.1 INTRODUCTION
The information contained in this manual provides general guidelines for implementing a
Modbus® communications network utilizing AERCO’s Boiler Management System (BMS) Model
168, Boiler Management System II (BMS II) Model 5R5-384, or AERCO Control System (ACS)
and C-More Boiler Controllers.
Throughout this document, the following terminology shall be used when referring to BMS
Model 168 and BMS II Model 5R5-384:
• BMS: Applies to BMS Model 168 Only
• BMS II: Applies to BMS II Model 5R5-384 Only
• BMS/BMS II: Applies to Both Models (BMS and BMS II)
• BMS II/ACS: Applies to Both Models (BMS II and ACS)
• ACS: Applies to ACS Only
All Modbus networks are implemented utilizing a Master-Slave technique where only one
device, the Master, can initiate a communication sequence. AERCO C-More Controllers can
only function as Slave devices in a Modbus network. However, the AERCO BMS can function
both as a Master controlling C-More Slaves, or as a Slave controlled by an Energy Management
System (EMS) or Building Automation System (BAS) developed by other manufacturers.
1.2 AERCO BMS AND C-MORE CONTROLLER MODELS COVERED
To easily determine if your AERCO BMS or C-More Boiler Controller is equipped with Modbus
capabilities, check the current software version as follows:
For BMS:
• Apply power to the BMS
• The BMS will display: INITIALIZING followed by EPROM REV K
• If REV K or higher is displayed, the BMS Controller can support Modbus
• If the REV level is lower than K, the BMS Controller cannot support Modbus
For BMS II/ACS:
• All BMS II Controllers support Modbus
For C-More:
• Apply external power to the C-More Controller
• Scroll through the Setup Menu and observe the displayed Software Version
• If 2.00 or higher is displayed, the C-More Controller can support Modbus
• If a Software Version lower than 2.00 is displayed, the C-More Controller cannot support
Modbus