Press this button before inserting a new line.
The editor enables you to terminate a connection line with a boolean negation represented by a small circle. To set or remove the boolean negation, select the line and press the SPACE bar.
Connection lines must always be drawn in the direction of the data flow: from an output pin to an input pin. The FBD editor automatically selects the best routing for the new line. Connection lines indicate a data flow between the following possible objects:
|Block: Refer to the help on the
block for the description of its input and output pins, and the
expected data types for the coherency of the diagram.
|Variable: Variable can be connected on
their right side (to initiate a flow) or on their left side for
forcing the variable, if it is not read only. The flow must fit
the data type of the variable.
|Jump: a jump must be connected on
its left side to a Boolean data flow.
rail: Left power rails represent a
TRUE state and can be connected to a non limited number of objects
on their right side.
|Contact: A contact must be connected
on its left side and on its right side to Boolean data flows.
rail: Such rail that collects
several Boolean data flows for an OR operation, in order to
insert parallel contacts such as done in Ladder Diagrams. It may
have several connections on its left side and on its right side.
All connected data flows must be Boolean.
|Coil: A coil must be connected on
its left side to a Boolean data flow. It is not mandatory that a
coil be connected on its right side.
|Right power rail: A right power rail is an element of the LD language, and is commonly used for terminating Boolean data flows. It has a non limited number of connections on its left side. It is not mandatory to connect coils to power rails.|