Watts AERCO EXT Installation, Operation & Maintenance Manual page 3

Ufly Controller and BCM for Modulex EXT
6.6.1 Master BMS II/ACS or EMS/BAS Terminating Resistor and Bias ............................................ 52
6.6.2 BCM Controller Terminating Resistor ..................................................................................... 52
6.7 MODBUS NETWORK WIRING DIAGRAM ................................................................................... 53
6.8 MODBUS SOFTWARE SET-UP ................................................................................................... 54
6.8.1 BCM Set-Up For Modbus Operation ....................................................................................... 54
6.8.2 AERCO ACS Modbus Control and Monitoring ........................................................................ 56
6.8.3 Modbus Remote Setpoint Control and Monitoring ................................................................... 56
6.8.4 EMS or BAS Set-Up as Master to BCM Controller Slaves....................................................... 56
6.9 MULTIPLE MODULEX BOILER HEATING MODE - USING ACS ................................................. 56
6.9.1 Sequence of Operation (Example: Four-Modulex boiler installation) ....................................... 57
CHAPTER 7: BCM MODBUS AND ADDRESS ASSIGNMENTS .......................................................... 59
7.1 BCM MODBUS COMM. & SUPPORT REQUIREMENTS ............................................................. 59
7.1.1 Function Codes ...................................................................................................................... 59
7.1.2 Modbus Support Requirements .............................................................................................. 59
7.2 BCM CONTROLLER STANDARD HOLDING REGISTER ASSIGNMENTS .................................. 60
7.2.1 BCM Controller Standard Input Register Assignments ............................................................ 60
7.2.2 BCM Controller Standard Holding Register Assignments ........................................................ 60
CHAPTER 8: TROUBLESHOOTING ................................................................................................... 71
8.1 UFLY CONTROLLER ERROR CODES ........................................................................................ 71
8.1.1 BCM (Boiler Communications Module) Fault Codes ............................................................... 72
8.1.2 BMM (Burner Management Module) Fault Codes ................................................................... 74
APPENDIX A: BCM PARAMETERS ..................................................................................................... 76
APPENDIX B: BMM PARAMETERS ..................................................................................................... 80
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