SECTION 8
MAPNET II@
INTRODUCTION
The MAPNET II@ option allows the use of addressable devices and TrueAlarmTM sensors with the system.
Addressable devices communicate the exact location of an alarm to the NDU operator interface panel, improving
recognition of the condition and the subsequent response. It also pinpoints the precise location of trouble conditions
via the custom label description.
A TrueAlarmTM sensor measures smoke density or heat intensity, but has no self-contained alarm set point. The
alarm set point is programmed into the network node. Thus, the decision is made by the network node, rather than
by the sensor.
MAPNET II@ ALPHANUMERIC DISPLAYS
When a MAPNET II@ device changes to an abnormal state, or the operator enters a MAPNET II@ device address,
the NDU alphanumeric display shows the current status of the MAPNET II@ device. After entering a MAPNET II@
device address, press the <FUNCTION> key on the operator interface panel to display additional device information.
For the TrueAlarmTM sensor, device information reported back to the NDU operator interface panel also includes
data about the condition of the sensor itself. For example, the sensor might report that it is dirty or excessively dirty.
MAPNET II@ POINT ADDRESSING
Each MAPNET II@ device must have a point address in order to communicate with the NDU. These point addresses,
along with their custom labels, are located in the Programmer’s Report. The Programmer’s Report shows the
address for each device, separated by hy hens. Hyphens
must
be used when entering a MAPNET II@ address into
the system. An example of a MAPNET II
8 .
device address is “3:Ml-5”. The “3:” portion of the address identifies the
owning node. The “Ml” portion of the address identifies the MAPNET II@ channel, channel 1. The “5” portion of the
address identifies the device number, number 5. MAPNET II@ channel numbers range from 1 through 9, and 0, with
MAPNET II@ channel 0 actually being channel 10.
HOW TO DISPLAY A MAPNET ll@ SYSTEM POINT
See Section 9, “How to Display MAPNET II@ Point Status”, for MAPNET II@ operations. This procedure also shows
how to use the Programmer’s Report to find MAPNET II@ addresses.
WHAT TO DO IF A MAPNET II@ POINT WILL NOT RESET
If a MAPNET II@ device will not reset, you may decide to disable the point with the <DISABLE> key. When the
disable procedure is performed, a System Trouble occurs to remind you that the point is disabled. The disable
procedure is the same for all system points. (See Section 2, “How to Disable a Point”.) Maintenance personnel must
be called immediately to repair the malfunction.
After the MAPNET II@ point is repaired, you can enable the point again. (See Section 10, “How to Enable a Disabled
Point”.) This procedure is the same for all system points.
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