CB FALCON MODBUS COMMUNICATION
6
Table 4. CB Falcon Modbus register map
000F 0015
4-20 mA remote control
input (S2) terminal
R U16 4-20 mA (0.1 mA precision) or other (see register 609)
0010 0016 Active CH setpoint R U16
-40°-130° (0.1°C precision)
a
Setpoint determined by CH setpoint source (register 65).
0011 0017 Active DHW setpoint R U16
-40°-130° (0.1°C precision)
a
Setpoint determined by
DHW setpoint source (register 81).
0012 0018 Active LL setpoint R U16
-40°-130° (0.1°C precision)
a
Setpoint determined by LL
setpoint source (register 161).
0013 0019 Register Access Status RR U16U1
6
Register data write access status:
0=No register writes allowed,
1=Installer register writes allowed,
2=OEM register writes allowed.
3=All register writes allowed.
0014 0020 Steam pressure R U16 0-150 psi (0.1 psi precision)
0015 0021 Analog modulation input R U16 0=No signal, otherwise
4-20 mA (0.1 mA precision)
Duplicate of register 15 when S2 terminal is 4-20 mA.
0016 0022 Active CH pressure setpoint R U16 0-150psi (0.1psi precision)
0017 0023 Extended Status Change R U16 Register is cleared (all bits zeroed) after read. Identifies
register groups that have new status or configuration
data in them.
Bit map
:
15-5=Reserved
4= DHW plate heat exchanger configuration
3=DHW plate heat exchanger status
2-0=Reserved
0018-001F 0024-0031 RESERVED
BURNER CONTROL
STATUS
0020 0032 Burner control status R U16 0=Disabled,
1=Locked out,
2-3=Reserved,
4=Anti-short cycle,
5=Unconfigured safety data,
6-33=Reserved,
34=Standby Hold,
35=Standby Delay,
36-47=Reserved,
48=Normal Standby,
49=Preparing,
50=Ignition,
51=Firing,
52=Postpurge,
53-65535=Reserved
0021 0033 Burner control state R U16
Burner control sequence (I/O) state (see table 11). Model
type determined by register 176.
0022 0034 Lockout code R U16 0=No lockout,
1-4096 (see Table 8)
0023 0035 Alarm reason R U16 0=None,
1=Lockout (see Lockout code, register 34),
2=Alert (see Table 10),
3=Other
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