Sending a String Array in C++ program to PLCNext Engineer

Roy Clappers

Hello,

In my C++ Program i am using a String Array to store ID's that are scanned, the ID's are all stored in the same Array, the Array is declared like this. 

std::string IDPresent [50];

Is it possible to connect the Array to a port so i can use the value's in my PLCNext Engineer program? and if so, how?

 

Many thanks.

 

Oliver PLCnext Team

Hello,

Due to fixed length restrictions that come with IEC strings you need to use the type StaticString or StaticString\< customLength \> 

Then you will need to create an array of that StaticString type.

kind regards,
Oliver

Roy Clappers

Hello Oliver,

Thanks for the answer. My next problem is to connect the StaticString Array to a port in PLCNEXT Engineer, I tried making a datatype like this:

TYPE
   DataStringArray : ARRAY[0..49] of STRING;
END_TYPE

But the datatype doesn't seem to be compatible with the StaticStringArray. I have the StaticString Array declared like this in my c++ program:

//#port
//#name(StaticStringArray)
StaticString<80> StaticStringArray[50];

Many Thanks.

Roy Clappers

When I try to connect the 2 ports it doesn't give the option to connect. this is what i see in my Port list.

 

Oliver PLCnext Team

Hello Roy,

i think you might be using a old PLCnCLI Version.

https://www.plcnext-community.net/en/discussions/c-pass-the-output-to-plcnext.html
you notice that the ComponentName is still displayed at the type name.