Producer and consumer labels are used for communication between PLCs, and beginners do not need to master them.
If the newly created label type is basic, please specify its data type and range (global variable and local variable).
If the new tag type is Alias, you only need to determine the tag that the alias points to (basic tag or alias tag), and the data type depends on the basic tag.
It should be said that the created global variables can only be aliased as global variables (as shown above, the program is grayed out), and local variables can be aliased as local variables and global variables.
The use of alias can make the program and drawing design of the project be carried out at the same time, and it is also convenient to replace the damaged input and output channels. For example, the external inputs and outputs are I0.0, I0. 1, Q0.0 and Q0.2, respectively. In the program, this is a global basic variable (automatically generated after adding a module). We can create a new one, with the label Input0 as an alias and pointing to I0.0, and the label Output0 as an alias and pointing to Q0.0 ... These two points belonging to I0.0 are used many times in the program, if I0.0 is damaged. Replace with I0. 1. The idea is to replace all I0.0 in the program with I0. 1. If there is something displayed by the upper computer, it may be modified. Heavy workload and easy to make mistakes.
Now you can directly right-click to modify the property of Input0 and change I0.0 to I0. 1.