In TIA Portal, a list of system tags is stored in the PLC Tags group of the table:
As an example, let’s analyze the next table:
Let’s add the variable Wash mech filter 1 stored in the region I (inputs). The first digit after region is a byte address (0 in our case). Because of a data type of the variable is BOOL (digital input), a bit number is specified after a dot (1 in our case).
Thus, settings of Wash mech filter 1 in Multi-Protocol MasterOPC Server will be as shown below:
