Greetings,
I am using OPC to communicate my S7-300 PLC to Labview. As OPC Server I am using NI OPC. I have created the bounded variables in the Labview project and everything works fine with reading variables but when I tried to wirte in the PLC there is no action in the variables I am trying to reach.
For example, I am trying to write a boolean value to a %M tag as the picture described but I do not get any result.
I have to point out that there is a code running in the PLC, is there any conflict between the code already running in the PLC and the vi in Labview? Or is there any module or license I am missing to be able to write in the PLC?
Thanks for all your help.