OMM 1130 73
BAS Interface
The BAS interface will use the supervisor port on the controller as a connection point.
Protocols Supported
The following building automation system (BAS) protocols are supported. It is possible to change the
building automation interface without loading different software.
BACnet®
When protocol is set to BACnet, the baud rate and ident set points are not accessible. The ident setting is
locked at 1 for BACnet, and the baud rate is locked to 19200.
LONworks®
With protocol set to LON, the baud rate and ident set points are not accessible. The ident setting is locked
at 1 for LON, and the baud rate is locked to 4800.
Modbus®
With the protocol set to Modbus, the baud rate and ident set points are accessible.
Available Parameters
Types: A = Analog, I= Integer, D= Digital
I/O: I = Input only, O = Output only , I/O = Input/Output
Type Index I/O Description LONWORKS BACnet Modbus
A 1 I/O Network Cool LWT set point x x x
A 2 O Active LWT set point x x x
A 3 I/O Network limit set point x x x
A 6 O Evap LWT x x x
A 7 O Cond EWT x x x
A 10 O Unit capacity (%) x x x
A 11 I Network Cool LWT set point default x
A 15 O Suction temp x x x
A 16 O Evap sat temp x x x
A 17 O Evap pressure x x x
A 20 O Cond sat temp x x x
A 21 O Cond pressure x x x
A 39 O OAT x x x
A 42 O Active Capacity Limit x x x
A 50 I/O Network Ice LWT set point x x x
I 1 O Active alarms 1 x x x
I 2 O Active alarms 2 x x x
I 3 O Active alarms 3 x x x
I 4 O Active alarms 4 x x x
I 5 O Active alarms 5 x x x
I 6 O Active alarms 6 x x x
I 7 O Active alarms 7 x x x
I 8 O Active alarms 8 x x x
I 9 O Active alarms 9 x x x
I 10 O Active alarms 10 x x x
Continued next page.
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