We append another rung so that we can add the logic to increment or add 1, to “N7:0” when the timer times up.
We navigate to the “Compute/Math” tab, and click on “ADD”.
We want to execute the “ADD” instruction when the timer times out.
The bit “DN” is set when the timer times out.
To add this to the logic, we move back to the “User” or the “Bit” tab.
The “User” tab has instructions that are most often used, one of which is the “XIC” instruction, “Examine if Closed”. This instruction appears in the list as a “normally open” contact.
The “XIC”, or “normally open” contact, is true when the bit address assigned to it is equal to 1, the “ON” state.