Use this function to convert your circuit program between LAD and FBD.
The following rules apply to the conversion from LAD to FBD:
A series circuit of contacts is converted into an AND block.
A parallel circuit of contacts is converted into an OR block.
User-defined comments are not included, as their position in the circuit program cannot be defined based on blocks.
Crosslinks (connections where a block output is connected to multiple block inputs and at least one of the inputs is connected to multiple block outputs) are converted into an OR block.
Inputs for the OR block are all block outputs of the crosslink.
The output of the OR block is connected to all block inputs of the crosslink.
Internal flags are resolved, and the current paths are linked.
|
|
This function is inactive in the UDF Editor. |
Use this function to convert your circuit program between FBD and LAD.
An AND block is converted into a series contact circuit
An OR block is converted into a parallel contact circuit
Comments for basic functions are not applied in LAD, as a basic function is converted into multiple contacts. Thus, the comment cannot be assigned definitely.
In LAD, input comments are assigned to all contacts of this input.
User-defined comments are not included, as their position in the circuit program cannot be defined based on blocks.
XOR blocks must be converted into corresponding LAD logic consisting of positive and negative contacts.
|
Note
When converting between LAD and FBD, the total number of blocks in your circuit program can sometimes increase. This could cause the permitted number of blocks for your LOGO! to be exceeded. You cannot, therefore, always convert FBD programs to LAD. Remedy: Under Tools -> Select Hardware, select the hardware series that you are using. Start converting to LAD. Then under Tools -> Determine LOGO!, see which hardware series is compatible with the circuit program. If your circuit diagram contains a UDF block, you cannot use this function to convert it from FBD to LAD. |