Modbus Software Set-Up; Bcm Set-Up For Modbus Operation - Watts AERCO EXT Installation, Operation & Maintenance Manual

Ufly Controller and BCM for Modulex EXT
CHAPTER 6: BOILER COMMUNICATIONS MODULE (BCM)
Figure 6-15 shows a Sample Modbus Network wiring diagram for a Master EMS/BAS controlling
BCM Controller Slaves. This Figure shows an EMS or BAS Master equipped with a RS485 port.
If the EMS or BAS contains a 4-Wire RS485 port, refer to Detail "A" for wiring details. If the
controlling Master EMS/BAS contains only a RS232 port, a RS232-to-RS485 converter will be
required to interface with connector Y2 at each BCM Controller. It should be noted that this
diagram is only intended as a guide and does not include all possible scenarios. Refer to the
EMS/BAS manufacturer's manual prior to attempting any network wiring connections.
Figure 6-15: EMS/BAS Master Controlling Modulex Boiler Slaves

6.8 Modbus Software Set-Up

The following sections provide the information and procedures necessary to configure the Boiler
Communications Modules (BCMs) to operate on a Modbus Network.

6.8.1 BCM Set-Up For Modbus Operation

The BCM Controller can be set up for the following types of Modbus operating modes:
• Monitoring and Configuration Only
• AERCO ACS Modbus Control and Monitoring
• Modbus Remote Setpoint Control and Monitoring
For the BCM Controller to be recognized by the Modbus Master, a valid address must be set at
each BCM on the Modbus Network. Address is set using Parameter 816 on the BCM. Only
Modbus addresses 1 or greater will be recognized by the Modbus Master. A different address
must be set to for each Modulex Boiler being controlled on the Modbus Network.
OMM-0159_A_A • 6/28/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
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