The Software
There are two software programs built into the WVC16. The first is a web server that provides the connection between the WVC16 and the client's computer. The second is the Ultra SlimPak II Data Viewer applet.

The web server is the "Home" page. Other functions can be selected from there. The Statistics frame contains information on the Ethernet connection, the frames sent and received, as well as information about the infrared bus between the modules. An Error Log will list any errors that have occurred. The Help file contains the entire user instruction manual for the WVC16.

The Data Viewer applet is launched from the Home page. Note that in order to install the Data Viewer, you must first have the Java Runtime Environment (JRE) 1.3.1 (or greater) plug-in installed on the client machine. If the plug-in has not been installed, the web browser will detect the fact and automatically connect to Sun Microsystems Java site in order to download and install the plug-in. Once the plug-in is installed, the Data Viewer will download and open.

The Data Viewer is used to view process data, define data logging parameters, and set up e-mail and address book information. The applet runs in a window of its own. The window shows all of the modules connected to the WVC16 (see Figure 2). The data logging function is defined in this window. Note that data logging is not simultaneous data from channel to channel - there is a time delay from sample to sample, as well as network delays that may need to be considered. The time-stamped data gathered here would then be downloaded to a program like MS Excel for further analysis.

Clicking on a module name brings up a window showing the signal connected to the selected module. From this window, the input and output ranges can be viewed, high and low alarm limits can be set, and module calibration can be performed. The About tab will list the firmware revision, the current temperature of the module, the high and low temperature to which the module has been subjected, and the number of hours it has been in operation.

LED Indicators
There are six LED indicators, in two groups of three, that can be viewed through the translucent front cover. They are located down the left side of the unit. There is also a power LED located on the right side of the unit. There functions are described as follows:

• On when 9 to 30VDC is applied to the unit.

• Flashes if a module error has been logged into the non-volatile SRAM or if the battery was disabled prior to applying power.

• On to indicate Ethernet Client connection.
• Flashes if no connection.
• Off if network parameters need to be set.

• On when modules are detected on IR bus.
• Flashes if no modules are detected on IR bus.

• On to indicate a network socket connection fault.

• On to indicate 10Base-T transmit/receive and collision activity.

• On to indicate 10Base-T link activity.