132 CoDeSys 2.3 Runtime Environment
WAGO-I/O-SYSTEM 750
758-874/000-131
WAGO-I/O-IPC-C6
Manual
Version 1.0.0
11.10.3 Eliminating CoDeSys Web Visualization Errors
If problems occur when using CoDeSys Web visualization, please try to find a
solution in the following table first. If you cannot eliminate the problems, please
contact WAGO support.
Table 57: Errors and its solution
Error
Solution
Internet Explorer
reports the error
"APPLET NOT
INITIATED"
Close all Internet Explorer windows and restart it. If the error continues
to occur, this indicates a missing or damaged file.
Check whether the Java archive "webvisu.jar" is completely available in
the folder "/PLC" of the I/O-IPC using FTP. The original file can be
found in the installation path of CoDeSys (usually under
C:\Programme\WAGO Software\CoDeSys V2.3\Visu\webvisu.jar)
.
If necessary, replace the damaged file using FTP or force the download
of all files in CoDeSys with
Purge All > Compile All > Log In
.
Web visualization is not
displayed
Have you installed the JRE? Check the firewall settings, e.g. if port 8080
is open.
Web visualization
"freezes".
Web visualization stops
after a longer period of
time.
The call-up intervals selected in the task configuration are too small. As a
result, the I/O-IPC Web server, which is executed with a low priority,
receives insufficient or no computing time.
If no (explicit) task configuration has been provided, the PLC_PRG is
(implicitly) executed as a free running task with Priority 1. This allows
the Webserver too little computing time. Always provide a task
configuration when using Web visualization. In doing so, the call-up
interval should not exceed three times the average execution time. When
determining the execution time, ensure that the PLC program is not
"steady state."
Web visualization
cannot be loaded into
the I/O-IPC
It may be that not all files fit into the file system of the I/O-IPC. Do not
delete necessary data (e.g., via FTP).
Bitmap is not displayed If the name of an image file contains umlauts, the Web server cannot
interpret these image names.
Java console reports:
"Class not found"
The JRE does not find the entry point for the class "webvisu.class" in the
Java archive "WebVisu.jar. The Java archive is probably incomplete.
Delete "WebVisu.jar" from the Java cache and/or deactivate the cache. In
this case, the I/O-IPC requests the archive (applet) again.
If the problem continues to exist, upload the project onto the I/O-IPC
again.
Web visualization is
static, all process values
are "0"
The cause is that the process data communication has failed.
If web visualization is operated over a proxy server, then a SOCKS
proxy is also necessary for process data exchange in addition to the
actual HTTP proxy.
