PLC Programming

4 - The Individual Components
Options for Log
If you choose this category in the Options dialog box, then you get the dialog box shown below.
In this dialog, you can configure a file that acts as a project log, recording all user actions and internal
processes during Online mode processing (see also: Log).
If an existing project is opened for which no log has yet been generated, a dialog box opens which
calls attention to the fact that a log is now being set up that will receive its first input after the next
login process.
The log is automatically stored as a binary file in the project directory when the project is saved. If you
prefer a different target directory, you can activate the option Directory for project logs: and enter
the appropriate path in the edit field. Use the
this purpose.
Option dialogue for the category Log
button to access the "Select Directory" dialog for
Options for Build
The log file is automatically assigned the name of the project with the extension .log. The maximum
number of Online sessions to be recorded is determined by Maximum project log size. If this
number is exceeded while recording, the oldest entry is deleted to make room for the newest.
The Log function can be switched on or off in the Option field Activate logging.
You can select in the Filter area which actions are to be recorded: User actions, Internal actions,
Status changes, Exceptions. Only actions belonging to categories checked here will appear in the Log
window and be written to the Log file. (For a description of the categories, please see Log).
The Log window can be opened with the command 'Window' 'Log'.
If you choose this category in the Options dialog box , then you get the dialog box shown below.
Debugging: Additional debugging code is created, that is the code can become considerably larger.
The debugging code is needed in order to make use of the debugging functions offered by CoDeSys
(e.g. breakpoints). When you switch off this option, project processing becomes faster and the size of
the code decreases. The option is stored with the project.
Replace constants: The value of each constant is loaded directly, and in Online mode the constants
are displayed in green. Forcing, writing and monitoring of a constant is then no longer possible. If the
option is deactivated, the value is loaded into a storage location via variable access (this does in fact
allow writing the variable value, but implies longer processing time).
Nested comments: Comments can be placed within other comments. Example:
(*
a:=inst.out; (* to be checked *)
b:=b+1;
*)
CoDeSys V2.3 4-9