Using ArEventLog Example Code for logging

[kenneth.tham]

Hi,

I have created a ST program in Automation Studio and ported the example code for ArEventLog into it. The program is able to compile. I was wondering how I could modify this for logging a message from another .as or .st program. Is it possible to create a function that can be called from another automation basic program to perform logging? Would it be callable in C/C++ also?

When running the example program, should I see ‘This is an information entry from the user.’ log message?

Regards,
Kenneth
Program.zip (4.2 KB)

[kenneth.tham]

I managed to display some logs from the same test program by setting the following in PROGRAM_INIT:
EventLog.Commands.CreateUserLog := TRUE;
EventLog.Commands.WriteUserEvent := TRUE;

[fabian.pries]

Hello,

you can create a user library starting from this sample task.
With a user library it would be possible to use the logging in every task you have.

Without a library you would need to create logbooks per task, share the ident for the logbook or acquire the ident using the name of logbook in each task.

I personally would go with the library option. The IEC conform library should be usable in IEC and also in a C/C++ program.

BR Fabian

[fabian.pries]

Kind of a duplicate

Using ArEventLog in Automation Basic

If you created the ident in a C++ task, just copy the ident (which is the .ident output of the FB ArEventLogCreate, it’s an UDINT) on a global PLC variable, and use it for function block calls in the AB task. The 2nd possibility is to call the function block ArEventLogGetIdent in the AB task. This function block determines the ident by the given logger module name (which is a string). Then, there’s no need to share the ident out of the C++ program. Best regards!