Hi Tomáš, these are just some 'Chinese' IO modules which do work just fine with Codesys running on a Raspberry Pi 4. However it would be nice that I would be able to use them with Rexygen as I feel more comfortable programming in Rexygen Studio and I like the way an HMI can be created inside Inkscape.
If you could provide me a basic example then I can give it a try.

Attached are two xml files.

Ethercat_xml.zip

EV3200D = 32 digital Inputs
EtherCATBusIO = 16 DI / 16 DO / 2AO / 2AI / 2 PWMout / 1 encoder input / 2 counter input / 1 Modbus RTU

@Jan-Reitinger Hi Ja, thank you very much, I'll give it a try one of these days. When I have some results I'll post the outcome here.

Hi Tomáš, these are just some 'Chinese' IO modules which do work just fine with Codesys running on a Raspberry Pi 4. However it would be nice that I would be able to use them with Rexygen as I feel more comfortable programming in Rexygen Studio and I like the way an HMI can be created inside Inkscape.
If you could provide me a basic example then I can give it a try.

Attached are two xml files.

Ethercat_xml.zip

EV3200D = 32 digital Inputs
EtherCATBusIO = 16 DI / 16 DO / 2AO / 2AI / 2 PWMout / 1 encoder input / 2 counter input / 1 Modbus RTU

In the release notes "REXYGEN 3.0.0-beta" there is mentioned that EtherCAT Communication Driver's
Jitter and latency are reduced with the added support for XPD on Linux.

Does this mean we can use EtherCAT now? I am asking because I have a huge interest in using my RasPi with Rexygen in combination with two IO-EtherCAT modules.

@reitinge I did try this before but then I can't even compile due to an error.

But apparently it was because I did the initialization of this string inside the main routine.
Bizarre that it is throwing a warning for the string 'stringTemp' and not for the long variable 'index'.
Both are only used inside the main routine.

This is the complete code which is now running without a warning :

//assigning inputs to variables, these variables are READ-ONLY
double input(0) inputGLAS; 
double input(1) inputGFT; 
double input(2) inputPMD;
double input(3) inputRA;
double input(4) inputTEXT;
double input(5) inputP_K;



//assigning variables to outputs, these variables are WRITE-ONLY
string output(0) stringOUT; //value to send to y0 output
char stringTemp[80];



//the init procedure is executed once when the REXLANG function block initializes
long init(void)
{
	
	return 0;
}

//the main procedure is executed repeatedly (once in each sampling period)
long main(void)
{
	
	
	long index = 0;
	
	//char stringTemp[80];
        stringTemp="";

	strcat(stringTemp,"Vergeet+niet+volgend+vuilnis+buiten+te+zetten+:+");
	
	if (inputGLAS!=0)
	{
		strcat(stringTemp,"Glas");
		index=index+1;
	}
	
	if (inputGFT!=0)
	{
		if (index!=0)
		{
			strcat(stringTemp,",+");
		}
		strcat(stringTemp,"GFT");
		index=index+1;
	}
	
	if (inputPMD!=0)
	{
		if (index!=0)
		{
			strcat(stringTemp,",+");
		}
		strcat(stringTemp,"PMD");
		index=index+1;
	}
	
	if (inputRA!=0)
	{
		if (index!=0)
		{
			strcat(stringTemp,",+");
		}
		strcat(stringTemp,"Restafval");
		index=index+1;
	}
	
	if (inputTEXT!=0)
	{
		if (index!=0)
		{
			strcat(stringTemp,",+");
		}
		strcat(stringTemp,"Textiel");
		index=index+1;
	}
	
	if (inputP_K!=0)
	{
		if (index!=0)
		{
			strcat(stringTemp,",+");
		}
		strcat(stringTemp,"Papier+en+Karton");
	}
	

	stringOUT=stringTemp;
	return 0;
}

//the exit procedure is executed once when the task is correctly terminated
// (system shutdown, downloading new control algorithm, etc.)
long exit(void)
{
	/* PUT YOUR CODE HERE */
	return 0;
}

I got this warning in the Compiler Window but everything is working fine :

"Warning compiling file 'WasteSrcfile.c' (line 30): variable 'stringTemp' is used without initialization"

The initialization was one like this :

char stringTemp[80];

Something like this, to initialize an empty string will not work :

char stringTemp[80] = "";

@cechurat No problem, workarounds are possible and and it's good to have some extra challenges.

But if the checkbox for 'persistent parameters' is there then I assume it is an existing feature.

I am using the SHIFTOCT function block to store every 24hr the counter of my energy meter to get some history of the last 7 days.
But even with the persistent parameters box checked I lose all data after rebooting and/or downloading a new configuration.

@cechurat ... this would mean that if I add a task in the future the timing might not be correct anymore.
Would it not be better that this can be configured with timing (e.g. seconds, minutes, days,.....) instead of a certain amount of samples?

@cechurat
So, thus this mean that with the below settings I need 1800 samples for a 15min running average, correct? (50msx10 --> every 0,5s a sample)

@cechurat
No problem, Node-Red is always good for a (temporary) work around.