Boolean Actions
Boolean (Boo) actions assign a Boolean variable to the activity of the Step. The Boolean variable can be an output or a memory variable. The variable is assigned each time the step activity starts or stops. The operation for Boolean actions differs for the different qualifiers:
N on a Boolean Variable | Assigns the step activity signal to the variable. |
S on a Boolean Variable | Sets the variable to TRUE when the step activity signal becomes TRUE. |
R on a Boolean Variable | Resets the variable to FALSE when the step activity signal becomes TRUE. |
The Boolean variable must be an OUTPUT or a MEMORY variable. The following SFC programming leads to the indicated behavior:
 |  |
Provide Feedback