FBD/LD Parser Error (FBDP0004): An input connector with the name '...' does not exist.
In FBD/LD, connectors can be used instead of lines. In order to substitute a line, one or more input connectors (which is/are read within the graphical code network) and exactly one output connector (which is written within the graphical code network) with the same name are required. Connectors are only valid within the same code worksheet. For "crossing" worksheets, jumps can be used.
In a worksheet, an output connector exists for which no input connector has yet been inserted. This is not allowed as it corresponds to an "open" line.
Complete the network by inserting one or more input connectors relating to the "open" output connector.