CLSS Gateway - Installation and Users’ Manual | P/N:LS10248-000HW-E | REV. F | FEB/11/2022 65
Register Mapping Modbus Communications
The maximum panel circuit points by fire panel is described in Table 7.16, “Supported
Circuits by Panel”.
Table 7.16: Supported Circuits by Panel
7.22.5 Bell Circuits Status Holding Registers
NFS2-640 and NFS-320 Only
Each of the bell circuits status holding registers are divided into an upper and lower byte
as described below and in Table 7.9, “Point Status Holding Register Bit Definitions”.
• 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’, See “CLSS Gateway Active Event Code” on page 74. for detailed
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 gateway 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’.
414041–414048 P6.1–P6.8
414049–414056 P7.1–P7.8
414057–414064 P8.1–P8.8
414065–414072 P9.1–P9.8
414073–414080 P10.1–P10.8
414081–414088 P11.1–P11.8
414089–414096 P12.1– P12.8
Panel Max. Panel Circuits Points
NFS-320 Not Supported
NFS-640 8
NFS2-640 Not Supported
NFS-3030 12
NFS2-3030 Not Supported
Table 7.15: Panel Circuits (Continued)
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