System manual CECX / Commissioning of CoDeSys and control
7.7 Connecting an FED
7.7.1 Configuration
For communication between the CECX and a Front End Display (FED) you
must specify which PLC variables are to be exchanged between the units.
For this CoDeSys makes available the so-called symbol file. It contains the
PLC variables of the CoDeSys project. The symbol file can be imported
with the Tag Editor of the FED Designer and used as tag dictionary. This
makes the PLC variables used in the CoDeSys project also available in the
FED Designer. Without the dictionary only markers (PLC Memory), inputs
(PLC Input), outputs (PLC Output), retain (PLC Retain) and parameters
(PLC Parameter) can be transferred.
Creating symbol files
If you have enabled the creation of symbol entries in the project options,
the symbol file is automatically created by CoDeSys during the compilation
of the project. However, you should first specify which PLC variables are to
be stored in the symbol file. The symbol file is created as text file <Pro-
jektname>.sym
) or binary file (<Projektname>.sdb
) in the project di-rectory.
To create the symbol file proceed as follows:
1) In CoDeSys provided by Festo enter the command [Pro-
ject][Options]. Now the dialog "Options" is displayed.
Dialog "Options"
CECX-II 7-16
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