For each hardware output (O1..O4, relay) and each software output (OA..OC), parame-
ters do20…do27 select flag Ox can be used to select the flags / connected flags where-
from the output signal shall be generated.
Before the linkage, the flags for the respective output can be inverted with parameters
do28[1..8] invert flags for output.
The type of linkage (OR / AND) is set with do19 AND operation for output.
The resulting internal output state is displayed in ru19 internal output state.
7.2.8.4 Structure overview