LD element coil

Symbol: , in the editor:

The element is only available in the LD editor.

A coil takes the value delivered from the left and stores it in the Boolean variable assigned to it. Its input can have the value TRUE (ON) or FALSE (OFF).

Several coils in a network can only be arranged in parallel.

In a negated coil , the negated value of the incoming signal is stored in the Boolean variable assigned to the coil.

Set coil and Reset coil

Symbol: , , in the editor: ,

Set coil: If the value TRUE arrives at a set coil, the coil retains the value TRUE. As long as the PLC program is running, the value at this point can no longer be overwritten.

Reset coil: If the value TRUE arrives at a reset coil, the coil retains the value FALSE. As long as the PLC program is running, the value at this point can no longer be overwritten.

You can define an inserted coil as a set or reset coil by using the command Set/Reset in the menu FBD/LD/IL or insert it as a set coil or reset coil from the Tools view.

See also:

• TC3 User Interface documentation: Command Set/Reset
• TC3 User Interface documentation: Command Insert Coil
• TC3 User Interface documentation: Command Insert Reset coil