IRIS
Intelligent Roadway Information System
GPS
A portable DMS can have an associated GPS (global positioning system) receiver. This allows the sign to be tracked and automatically updated with the nearest roadway and direction.
To create a GPS device, select the DMS and open its Properties
form. On the
Location
, there are controls for configuring the associated GPS. Once the GPS
is enabled, it must be associated with a controller. Its name will be the same
as the DMS, with _gps
appended. For NTCIP, the GPS should be associated
with the same controller as the DMS (using pin 2). For RedLion or SierraGX,
a new comm link and controller must be created to communicate with the modem.
The GPS will be polled once every 5 minutes, unless on a Modem
comm link. In
that case, the comm link period will be used. The Query GPS
button can be
used to manually poll the coördinates.