Editing Function Blocks

Introduction

You can insert function blocks using one of the following features:

LL984 Instruction Bar
Mnemonics
Data Selection
FFB Input Assistant.
Types Library Browser,
Copy/Paste

Inserting a Function Block

Step	Action
1	In the LL984 Editor right-click and select from the context menu either Data Selection (Ctrl+D) or FFB Input Assistant (Ctrl+I). You can also insert a function block using: drag-and-drop from the Types Library Browser (Alt+3), . copy/paste LL984 Instruction Bar Mnemonics
2	Enter the complete name of the function block (e.g. L9_SUB).
3	Confirm with Enter.
4	Click the cell where you want to insert the function block. Result: The function block is inserted (if allowed at this position).

Representation of the FFB Input Assistant

You can also see the Comments displayed in the dialog above as a tooltip when the cursor is placed over the respective pin of the function block.

Editing Values

To open the FFB Input Assistant for an already inserted function block, right-click the function block and select FFB Input Assistant from the context menu.

Click the Entry Field and enter a value.

You are only allowed to edit the Entry fields displayed in black. Only the nodes (top, middle, bottom) of a function block can be edited.

You can not edit the Entry fields displayed in grey (disabled).

Restrictions

For inserting function blocks the following restrictions apply:

Only LL984 library function blocks can be inserted in LL984 networks. If you try to insert a function block of another library a message will inform you, that this is not possible.
You can not insert self-programmed DFBs in LL984 networks.
LL984 library function blocks can not be inserted in IEC languages sections (FBD, LD, ST, IL). SFC does not use function blocks.
- FBD and LD editors will refuse insertion and will display a message that insertion is not possible.
- For textual languages (ST, IL) the call of an LL984 library function block will be detected during Analyze.