Program Editing - Omron CX-PROGRAMMER V9 Operation Manual

PART 1: CX-Programmer
CHAPTER 4 – Reference
whether they already have an address or not. The symbols are allocated according to their alphabetical order in
the symbol table.
From then on, anytime that user enters a new contact, coil, instruction or symbol with a fixed address, then that
address is immediately marked as being used if it occurs within an auto allocation area. Any symbols that the
user enters that don't have a fixed address are immediately auto allocated an address if available. The exception
to this is if symbols are entered directly as operands in the instruction dialog. These symbols cannot be auto
allocated. If these symbols are to be auto allocated they should entered either in the symbol table first, or by
using the browse button on the instruction dialog.
When a program is developed by several people, the contents of the symbol table edited by one person may be
overwritten by another person. It is therefore possible that consistency may not be maintained when automatic
address allocation is used. It is best to have only the person managing the entire program edit the automatic
address allocation data, and to have that person distribute the symbol table to other people. In addition, have
only that person transfer the symbol table to the PLC.

Program Editing

A number of procedures can be performed from within the Ladder program but it depends upon whether an
instruction, contact, coil, or workspace has been selected.
CX-Programmer _Page 74
To view the Ladder program, select the View Diagram button from the toolbar.
The following elements can be selected from the Diagram toolbar and placed directly into the
Ladder program.
New Open Contact. Once the Contact has been entered, the name or address for that contact
needs to be entered. Refer to Chapter – 4 Contact and Coil Editing for further information.
New Closed Contact. Once the Contact has been entered, the name or address for that contact
needs to be entered. Refer to Chapter – 4 Contact and Coil Editing for further information.
New Open Contact OR. Once the Contact has been entered, the name or address for that
contact needs to be entered. Refer to Chapter – 4 Contact and Coil Editing for further
information.
New Closed Contact OR. Once the Contact has been entered, the name or address for that
contact needs to be entered. Refer to Chapter – 4 Contact and Coil Editing for further
information.
Vertical. The New Vertical button from the toolbar connects elements in the Ladder program
vertically.
Horizontal. The New Horizontal button from the toolbar connects elements in the Ladder
program horizontally.
Note: Connecting lines can be drawn by clicking the Line Connect Mode button
the starting point and dragging to the end point. Connecting lines can also be deleted by dragging
after clicking the Line Delete Mode button
that is not connected on one end.
New Open Coil. Once the Coil has been entered, the name or address for that contact needs to
be entered, refer to Chapter – 4 Contact and Coil Editing for further information.
New Closed Coil. Once the Coil has been entered, the name or address for that contact needs
to be entered, refer Chapter – 4 Contact and Coil Editing for further information.
Instruction. Once the graphical instruction has been placed on the diagram, the actual
instruction must be selected, refer to Chapter – 4 Contact and Coil Editing for further
information.
Note that both a rung and elements of a program can be given comments within the ladder
display, by using Properties.
Use the following procedure to create a Ladder program.
1, 2, 3... 1. Select the PLC object in the project workspace.
. A line can also be drawn by dragging on a line
OMRON
and then clicking