PT-Link II N2-3
®
Technical Guide
PT-Link II N2-3 Interface
12
Troubleshooting the PT-Link II N2
Addressing WattMaster Devices in an
N2
®
Network.
Each PT-Link II N2
®
has the ability to generate virtual devices for all
of the WattMaster controls connected to it. Each virtual device operates
as an independent device and has all of the parameters pertinent to its
kind of control—VCM, VAV/CAV, or MUA II. The address of the virtual
device is calculated using the following formula:
Virtual Device Address
= [unit address (address set using DIP switches
on WattMaster controls) + Node_ID (value in the PT-Link II N2
®
confi guration fi le) - 1]. Example:
1.) The PT-Link II N2
®
has a Node_ID equal to fi ve.
2.) Two WattMaster controls connected and addressed to one
and
four.
3.) The
N2
®
client will see two devices—one will be device
fi ve and the other will be device eight.
Virtual N2 Device Address Example Calculation
AHU Controller Address
1
4
Node_ID
+
5
5
-
-1
-1
Virtual N2 Device Address
=
5
8
NOTE:
To simplify the calculation, we recommend that the Watt-
Master controls be addressed in sequential order from
one to the last control without any unused address(es) in
between.
