
E8 Controller and BCM for Modulex EXT
Installation, Operation & Maintenance Manual
CHAPTER 9: BCM MODBUS AND ADDRESS ASSIGNMENTS
OMM-0093_0A AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 95 of 108
GF-136-C Ph.: 800-526-0288 PRI: 06/24/2013
Table 9-4: BCM Standard Holding Register Address Mapping (Continued)
Modbus Data
Menu Item Units and Range
Default
OPERATING DATA REGISTERS (Continued)
1020 Operating Mode
0: Standby
1: Space Heating
2: DHW
3: Check
(Read Only)
1100 Linked BMM
Bit 0: BMM #0
to
(Read Only)
1101 Inserted BMM
Bit 0: BMM #0
to
(Read Only)
1102 BMM in Check Mode
Bit 0: BMM #0
to
(Read Only)
1103 BMM Flame Status
Bit 0: BMM #0
to
(Read Only)
1104 BMM Alarm Status
Bit 0: BMM #0
to
(Read Only)
1108
BMM Maximum Modulation Level
(Read Only)
1109 Pump Modulation Output
1200 Monitor Only
(Read Only) Global modulation
level from Cascade Manager
2n00
BMM #n Error Code
(n = 0 – 7)
(Read Only)
2n02
BMM #n Outlet Temperature
(n = 0 – 7)
14°F to 212°F (-10°C
to 100°C) (Value x 10)
(Read Only)
2n08
BMM #n Actual Modulation
Level (n = 0 – 7)
(Read Only)
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