Specifications

MODBUS COMMUNICATION MANUAL
5-1
SECTION 5 MODBUS SOFTWARE SETUP
5.1 INTRODUCTION
This Section provides the information necessary to configure the AERCO C-More Boiler
Controllers and a Boiler Management System (BMS) for operation on a Modbus Network. It
also provides the basic setup procedures to operate the C-More Boiler Controller and BMS in
each available Modbus Mode.
5.2 C-MORE BOILER CONTROLLER SETUP FOR MODBUS OPERATION
The C-More Boiler Controller can be set up for three types of Modbus operating modes. These
modes are as follows:
• Monitoring and Configuration Only
• Modbus Direct Drive Control and Monitoring
• Modbus Remote Setpoint Control and Monitoring
The following paragraphs provide the procedures necessary to set up the C-More Boiler
Controllers for each of the above modes of operation. These procedures assume that the
required wiring connections for Modbus operation have already been accomplished as
described in Section 4.
NOTE
The appropriate password must be entered in the Setup Menu of
the C-More Boiler Controller, prior to changing any of the current
settings. Refer to the appropriate Operation and Maintenance
Manual (GF109 for KC1000, GF110 for Benchmark) for detailed
information on menu items.
5.2.1 Monitoring and Configuration Control
In order for the C-More Boiler Controller to be recognized by the Modbus Master, a valid
Network Comm Address must be entered in the Setup Menu as follows:
NOTE
A C-More Boiler Controller can be monitored or configured on the
Modbus Network regardless of its mode of control.
1. Scroll through the Setup Menu until Comm Address is displayed.
2. With Comm Address displayed, press the CHANGE key.
3. Using the ▲ or ▼ arrow key, enter the appropriate Comm Address from 1 to 127.
4. Press the ENTER key to store the Comm Address in memory.