3
Operation and Programming Concepts
The basic layout of the network is a single loop (see Figure 1). Each panel and annunciator
has a unique ID. There is no requirement that the IDs be sequential or that they start with 1.
The master panel can be any fire panel in the network. The panels work in a peer-to-peer
fashion. This means that each panel is responsible for the programming of the inputs
connected to it. The master panel does not control the network, but it is the central location for
network information. Information is exchanged over the network via two basic means: a)
specific frames, which are from one panel to another, and b) broadcast frames, which are from
one panel to all others.
The special functions of master panel are:
a) synchronize the clocks on the network by broadcasting the date and time at 3:30am
every day; this means that only the master panel of a network requires that its clock be
calibrated;
b) maintain a network alarm list that includes all alarms, supervisory and trouble conditions
induced on any panel on the network;
c) transmit all signals from the network to a monitoring location.
1.3.2 Feature Operation
The following are the various types of frames that are sent on the network.
Commands & Restores
These specific frames are sent when a device in alarm requires operation of outputs at
another unit. These commands are for the bells, relays, control modules, device messages
and LEDs. When the device itself restores, the restore commands are sent right away so that
the other panels know that they can be reset. Anything operated stays latched until the Reset
key is pressed.
Hotkey and Hotkey LED Operation
If Hotkey routing is on a panel, it will send Ack, Reset, Sig Sil and Automatic Alarm Signal
Cancel to the other panels as specific frames.
If a panel’s function keys are sent to other panels, those panels will send commands to the
panel to have it turn on and off the hot key LEDs. This is so that there is indication that the key
function has become available. This will cause the LEDs to continue flashing after the key is
pressed until the frame is received to turn off the LED.
Time/Date Change
This broadcast frame is sent by a panel or annunciator if the time or date is changed. The
master panel also sends both a date and time change frame at 3:30am every day to
synchronize all the clocks in the network.
Manual Switch Operation
If the state of any of the 16 software switches is changed manually at any panel, this change is
broadcast to all other panels. The software switches are a system resource.
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