Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 705)

L-force | PLC Designer
General Editors

DMS 4.1 EN 03/2011 TD29 703
Coil
This is a LD element.
On the right side of a LD network there can be any number of so-called coils which are
represented by parentheses:
They can only be arranged in parallel. A coil transmits the value of the connections
from left to right and copies it to an appropriate Boolean variable. At the entry line the
value ON (TRUE) or the value OFF (FALSE) can be present.
Contacts and coils can also be negated, recognizable by the slash in the coil symbol:
In this case the negated value of the incoming signal will be copied to the appropriate
Boolean variable, thus: a negated contact only will connect through if the appropriate
Boolean value is FALSE.
A coil can be inserted in a network via command Insert Assignment which per default
is part of the FBD/LD menu Alternatively the element can be inserted via drag&drop
from the ToolBox ("Ladder elements") or from another position within the editor. See
also: Set and Reset Coils.
FBD, IL
If you are currently working in FBD or IL view, the command will not be available, but
contacts and coils inserted in a LD network will be represented by corresponding FBD
elements resp. IL instructions.