Types Of Function Blocks - Omron WS02-LCTC1-EV5 - V5.2 REV 12-2008 Manual

Creating Function Block

3-1-4 Types of Function Blocks

System Common Block
Control Blocks
Field Terminal Blocks
Sequence Control Blocks
Note Up to 32 nodes can be registered (01 to 32 when FinsGateway is
used as the communications driver, and 00 to 31 when CX-Server is
used).
The function blocks to be used are registered in the Project Workspace and are
assigned block numbers. Function blocks are grouped by type in function block
groups in the Project Workspace tree. Select function block groups according to
the application, and register the function blocks. The types of function blocks are
described below.
The System Common Blocks is used to make common settings for Loop Con-
trollers. There is one System Common Block registered for each Unit, and it can-
not be deleted from the Workspace tree.
Control Blocks are used to control the operation of Loop Controllers. They can
be registered in the Block Diagram function block groups.
Field Terminal Blocks are used to exchange data with I/O Units mounted to the
PLC. They can be registered in the Field Terminal function block group.
Note Data is not exchanged with CX-Programmer I/O tables. Even when
starting the CX-Process Tool with inherited settings, parameter in-
formation set in the I/O tables will not be inherited by ITEMS in Field
Terminal Blocks.
Sequence Control Blocks are used for sequence control in Loop Controllers.
Step ladder programs and sequence tables are used. Sequence Control Blocks
can be registered in the Sequence Control function block group. For details, re-
fer to 3-8 Creating Sequence Tables.
Section 3-1
105