06/05/13 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526- 0288 Page 95 of 112
Modulex E8 Controller and BCM
Operations and Maintenance Manual
9.2 BCM Controller Standard Holding Register Assignments
9.2.1 BCM Controller Standard Input Register Assignments
The BCM Controller has only two Read Only Input Register addresses as shown in Table 9-3.
Table 9-3: BCM Controller Standard Input Register Address Mapping
Data
0
Status & Error Code
enum (2,8,10,18,23,32,42,38)
High temperature switch open
Low gas pressure switch open
Air flow switch open during
ignition
Outlet temperature sensor fault
Other conditions not listed above
1
Unit Status
Standby (ready to run but not
fired)
9.2.2 BCM Controller Standard Holding Register Assignments
The BCM Controller Holding Registers contain functions that are Read Only, Write Only or both
Read & Write. The address assignments for these functions are listed in Table 9-4 and are
grouped into the following major categories: Control Registers, Operating Data Registers,
System Data Settings and Test Registers. Functions within each group are not necessarily in
hex address order.
The Read Only, Write Only or Read/Write status for each function in Table 9-4 is shown in the
Default/Comments column.