Omron WS02-LCTC1-EV5 - V5.2 REV 12-2008 Manual page 148

Creating Function Block
Order of Execution in Block Diagrams
122
5. Grab the annotation and move it to the desired position.
Note a) When the annotation is displayed over a function block or con-
necting line and covers it up, click the right mouse button to dis-
play the pop-up menu and select Annotations/Selected An-
notation/Send Behind Blocks and Lines.
b) If two annotations overlap, either one can be moved to the front or
back by clicking the right mouse button to display the pop-up
menu and selecting Annotations/Selected Annotation/Bring
to Front or Annotations/Selected Annotation/Send to Back.
Internal Loop Controller operations are executed according to the operation
cycle set for each function block. Steps 1 to 4 below are executed in each of the
eight types of operation cycles. For details on the operation cycles can be set for
function blocks, refer to the Loop Control Boards Function Block Reference
Manual.
1. User Link Tables: Read attributes, written as "Rd" (LCB) in the CX-Process
Tool
2. System Common Block
3. Control, External Controller, and Sequence Blocks
The order of execution is as follows:
1) In order of operation sequence (ITEM 005)
2) In order of function block address
4. User Link Tables: Write attributes, written as "Wr" in the CX-Process Tool
(LCB→)
With the CX-Process Tool, the function block operation sequence (ITEM 005)
can be registered as described below.
• Registering from ITEM Lists
Directly edit ITEM 005 in each function block, and set the operation se-
quence (1 to 2,000). The default setting is 2,000.
• Batch Registration from Block Diagrams
Select Settings/Setting Block Operating Order from the menus. The
following operation sequence will be set automatically.
Free Location Mode
The priority for the order of operation is based on the following rules.
1) In ascending order of the X coordinates of the function block position
2) In ascending order of the Y coordinate of the function block position
Example: The following figure shows a block diagram with nine function
blocks pasted. When the operation cycle batch setting is executed, the op-
eration sequence will be automatically set to 1, 2, 3, . . . 9. (The dotted por-
tion is the same as the X coordinate, so function blocks are pasted in as-
cending order of the Y coordinate.)
Block Diagram
Section 3-1