723PLUS Hardware Manual Manual 02877
20 Woodward
Chapter 4.
Using Servlink with Watch Window
Using Watch Window
Here are brief instructions for using Watch Window in conjunction with Servlink to
view the variables for your 723PLUS control on a PC (personal computer). These
instructions are meant to be introductory only. Full on-line help is available in
each application. It is assumed that you already have Servlink and Watch
Window installed. The default installation location can be found by clicking the
START icon (Microsoft Windows 95 or later) on the main menu bar and then
clicking the PROGRAMS menu item. Look for an icon called WOODWARD
WATCH WINDOW.
1. Make sure that all other programs that may access your computer
communications port are shut down.
2. Get the right cable to talk from your PC to the control (5416-614 will work for
J2 and J3, 5416-870 for J1).
3. Start the Servlink server and open a new file. Select the proper COM port for
your PC, verify that POINT TO POINT communications mode is selected,
and verify that the baud rate matches the baud rate of the 723PLUS. The
default baud rate is 19 200. See the on-line help file if you have been
changing the port settings of your control.
4. Select OK. If everything is working right, you should see an animated picture
of a string of “1”s and “0”s flying from the control to the PC on your screen.
You now have a network definition file whose default name is NET1. You
should save this file as “your filename.NET” (use FILE/SAVE AS). Link this
name to your control part number, as it will work only with that application.
For instance, if the upper level control number is 9907-031, you could save
the file as 9907031.NET. DO NOT DISCONNECT THE SERVER.
5. In the Servlink window you will now have another dialog window titled “your
filename.net”. In this window you will see a ballhead icon and a control
identifier name. Unless you have given the control a serial number (or name)
with the SLSN.EXE program, this name will display as “<unidentified>”.
6. Start the Watch Window application. When Watch Window executes, you will
have a screen displaying three windows entitled Watch Window, Explorer,
and Inspector.
7. The Explorer window will have two groups displayed, SERVICE and
CONFIGURE. Double clicking on either of these will expand them to show
groups of values. Explorer is used only to locate a tunable or monitor value.
In order to change a value or monitor a value, you must drag and drop a
value from the Explorer window into the Inspector window.
8. Once a value is displayed in the Inspector, you can see several blocks of
information. The most important blocks for a tunable value are the FIELD and
VALUE blocks. The FIELD block is used to identify a particular value, and the
VALUE block displays the current value of a variable. There are two types of
values available in Watch Window. One is a monitor value, which is marked
in the INSPECTOR window with a pair of glasses. This means it may only be
looked at. The other value is a read/write value, which is marked with a
pencil. The read/write type may be modified using the up and down arrows in
the value block.
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