RXT-300 SmartWireless™
RXT-300 Wireless IM
Rev. 2.0
Page 21 of 41
NOTE:
RF Silence can only be maintained while RXT-300 power is maintained. Any loss of
power can cause a RXT-300 to reset and will cause some amount of wireless traffic to be
generated as a result. It is up to the user to guarantee that power is maintained. As another
option the user can remove power from any RXT-300 Stations where there may be a concern
about power loss.
NOTE:
No sensor updates will occur during RF Silence. In effect, the detection system will
be in a non-operational state during RF Silence.
4.0
System Configuration
4.1
Overview
As mentioned earlier the RXT-300 SmartWireless™ Transceiver must operate differently based upon the
application it is used in, a HMI Station, Sensor Station or Alarm Station. To accommodate these different
applications the RXT-300s within a system must be configured accordingly. This is done using the Detcon
RXT-300 Wireless Configuration Tool (WCT) which allows the user to build the system configuration. The
user will save the final configuration to a file on the WCT and then load it wirelessly to all of the RXT-300s
that are part of that system configuration.
The configuration settings include much of the same information needed when setting up a control system for
a gas detection system. This would include both sensor settings and alarm settings. The sensor settings are
parameters such as Modbus™ addresses, registers to be read that include the concentration, settings for alarm
thresholds and whether these are ascending or descending. System settings would be for alarms, how they are
associated with sensors and their properties such as Energized/De-Energized, Latching and Silence-able. The
added configuration is related to the system and wireless setup as well as the RXT-300 with its Modbus™
addressing and alarm conditions.
This configuration data is captured using the RXT-300 Wireless Configuration Tool (WCT). It is a portable
unit that includes a LCD touch panel display with an application installed that help the user build a system
configuration as well as load it wirelessly. The configuration is entered in three stages, the first defines
System wide operation, the next defines RXT-300 operation and the last defines the sensors themselves.
When the user has completed all three levels of configuration there is a single file that is generated that
includes the whole system configuration. This file is then loaded only on the RXT-300s that are included in
that configuration. Upon reset or power-up each RXT-300 will process the configuration file to determine its
own operation within the system and fulfill the role as a HMI Station, Sensor Station or Alarm Station.
4.2
Building a System
Certain pieces of physical information must be collected prior to completing a system configuration. These
are needed at different stages of building a configuration using the WCT. Many parameters will default to
values that can be used without change. Others will have to be determined by the user and the specific
application such as sensor types, alarm thresholds and for each RXT-300 what devices are attached and how
are they configured. Most of this data will be entered in a top-down approach, starting with system
parameters, then RXT-300 parameters and finally the sensor parameters. The following sections give a
general overview of what is needed to build the system using the top-down organization of the WCT.
4.2.1
System Build Info
There are two main settings of importance here. The wireless network and the network sleep time.
