PLC Programming

Project Options...
Using the option Notice at load offers a dialog, when the command 'Online' 'Download' is given, with
the question "Do you want to write the source code into the controller system". Pressing Yes will
automatically load the selected range of files into the controller system, or you can alternatively finish
with No.
When using the option On demand the selected range of files must be expressly loaded into the
controller system by giving the command 'Online' 'Sourcecode download'.
The project which is stored in the controller system can be retrieved by using 'File' 'Open' with Open
project from PLC. The files will be unpacked in the process.
Options for 'Symbol Configuration'
The dialog presented here is used for configuring the symbol file. This will be created as a text file
.sym resp. a binary file .sdb (depending on the used gateway version)
in the project directory.The symbol file is needed for data exchange with the controller via the
symbolic interface and will be used for that purpose e.g. by OPC- or GatewayDDE -Server.
If the option Create symbol entries is activated, then symbol entries for the project variables will be
automatically created in a symbol file at each compilation of the project.
If additionally the option Dump XML symbol table is activated, then also an XML file containing the
symbol information will be created in the project directory. It will be named .SYM_XML.
Regard the following when configuring the symbol entries:
• If option 'Symbol config from INI-file' is activated in the target settings, then the symbol
configuration will be read from the codesys.ini file or from another ini-file which is defined there. (In
this case the dialog 'Set object attributes' in CoDeSys cannot be edited).
• If option 'Symbol config from INI-file' is not activated, the symbol entries will be generated in
accordance with the settings you can make in the 'Set object attributes' dialog. You get there using
the Configure symbol file button:
Dialog 'Set object attributes' (in option category Symbol configuration)
Use the tree-structured selection editor to select project POUs and set the desired options in the lower
part of the dialog box by clicking the mouse on the corresponding small boxes. Activated options are
checked. The following options can be set:
Export variables of object: The variables of the selected object are exported in the symbol file.
The following options can take effect only if the Export variables of object option is activated:
4-12 CoDeSys V2.3