5: Bell Circuits Status Holding Registers - Honeywell CGW-MB Installation And User Manual

Register Mapping
If the point is not present in the panel programming, all bits in the lower byte will contain
a '1' or the value 'FFH', but the upper byte will contain a '0'.
The holding register address and the CAM Text Event contained in the address are
detailed in the following table.
Bit
15 14
No.
Ack
Bit
Prealarm
Block
Name
When individual upper byte bits are set to 1, the following definitions
apply:
Ack Block (Bit 15): All events on this point, other than fire alarm, are
acknowledged. Not applicable for zones.
Prealarm (Bit 14): The channel is in a prealarm state. Not applicable for
zones.
Trouble (Bit 13): The channel is in a trouble state. Not applicable for
zones.
InActive (Bit 12): The channel is not active.
Active (Bit 11): The channel is active and there will be an active event type
in the lower byte.
Enable (Bit 10): The channel is enabled.
Disable (Bit 9): The channel is disabled.
Ack Fire Alarm (Bit 8): The fire alarm on this channel is acknowledged.
Not applicable for zones.
7.21.5 Bell Circuits Status Holding Registers
NFS2-640 and NFS-320 Only

Each of the bell circuits status holding registers is divided into an upper and lower byte as
described below.
• Upper Byte: The upper byte contains general status information about the bell circuit.
• Lower Byte: The lower byte is primarily used when bit 11 in the upper byte is a '1' (or
active). When bit 11 is a '1',
information about the active bell circuit. The lower byte will be all 0's if the bell circuit is
not in an active state.
Specifically, the lower byte contains the actual active event for this bell circuit. An active
state is defined in this CLSS Gateway mainboard as any Fire, Security, Critical Process,
Medical, Mass Notification, or Supervisory alarm state.
If the bell circuit is not present in the panel programming, all bits in the lower byte will
contain a '1' or the value 'FFH', but the upper byte will contain a '0'.
CGW-MB Installation and Users' Manual | P/N:LS10248-000HW-E | REV.G | JUL/31/2022
Table 7.22: CAM Text Event Holding Register Bit Definitions
Upper Byte
13 12
Trouble InActive
Start Address
415001
See "CGW-MB Active Event Code" on page 73.
11 10 9
Active Enable Disable
Table 7.23: CAM Text
End Address
416000
Modbus Communications
Lower Byte
8 7 6 5 4 3 2 1 0
Ack
Fire
Alarm
Active Event Code
(When Bit 11 is set
to 1, see
7.29 "CGW-MB
Active Event Code"
CAM Text
CAM1 – CAM 1000
for detailed
.)
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