Send string via Profinet to a PLC

Goodmorning,

Actually i'm working on a project with a CRB15000, i'm programming it with Robotstudio. The Robot is mounting a camera that is going to read some serial numbers.

From the camera i receive a string similar to "SN1234|123" but it could be different.

I need to cast this string into an array of byte, so i can send it to my PLC via Profinet with SetGO.

For example:

PERS string sendString;

sendString:= "SN1234|123";

SetGO SendByte0, StrToByte(sendString{1});

SetGO SendByte1, StrToByte(sendString{2});

Ecc...

But it didn't work

I also tried with SetGO SendByte0, StrToByte(StrPart(sendString, 1, 1)) but it didn't work.

What is the correct way to do it?

Thanks everyone.