750-265 96
Register Writes
Writing to any data register may require an access level
password. For those data registers requiring access security a
password matching the one contained in the Falcon must be
provided before the Falcon allows the data to be changed. A
valid password login remains in effect for 10 minutes before
another login is required (Falcon timeout for password login).
Two Modbus registers are defined to manage the register data
access login:
• (0x00B1) Password
• (0x00B2) Register Access Status
The Modbus master writes a password into the Password
register to request write access to the data registers. Even
though this register is a holding register, and therefore should
normally only accept a 16-bit value, it accepts alphanumeric
text up to 30 characters in length. Due to this length change,
this register must be written individually and not as part of a
group register write.
Results of the login are reported by the CB Falcon in the
Register Access Status register. If the Modbus master writes
the correct installer password, the status register indicates this
result and all data with installer access level and below can be
28 Pump B On - CH frost protection
29 Pump C On - CH frost protection
30 Pump A On - DHW demand
31 Pump B On - DHW demand
32 Pump C On - DHW demand
33 Pump A On - DHW frost protection
34 Pump B On - DHW frost protection
35 Pump C On - DHW frost protection
36 Pump A Off - DHW high limit
37 Pump B Off - DHW high limit
38 Pump C Off - DHW high limit
39 Pump A On - Exercise
40 Pump B On - Exercise
41 Pump C On - Exercise
42 Pump A On - Frost protection
43 Pump B On - Frost protection
44 Pump C On - Frost protection
45 Pump A On - Lead Lag master demand
46 Pump B On - Lead Lag master demand
47 Pump C On - Lead Lag master demand
48 Pump A On - Slave demand
49 Pump B On - Slave demand
50 Pump C On - Slave demand
51 Pump A On - Manual
52 Pump B On - Manual
53 Pump C On - Manual
54 Pump A On - Outlet high limit
55 Pump B On - Outlet high limit
56 Pump C On - Outlet high limit
57 Pump A On - Overrun
58 Pump B On - Overrun
59 Pump C On - Overrun
60 Pump A On - Frost protection overrun
61 Pump B On - Frost protection overrun
62 Pump C On - Frost protection overrun
Table 41. Pump Status Codes. (Continued)
Status Description Note
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