PART 1: CX-Programmer
CHAPTER 4 – Reference OMRON
CX-Programmer _Page 96
3. Select the Show in RungWrap button from the toolbar. The rungs are cut into the size of
the right bus-bar and arranged to show long rungs in the view.
Programming On-line
Once a program has been created and the project and PLC settings are satisfactory, the PLC can be connected to
allow on-line operations to be performed.
It is usual to have the PLC running in Monitor mode while using on-line editing functions. On-line editing is not
possible in Run mode.
Use the following procedure to program whilst on-line.
1, 2, 3…
1. Select the PLC object in the project workplace.
2. Select the Work On-line button from the toolbar (see note). A confirmation message is
displayed: select the Yes pushbutton to connect to the PLC. The icon in the project
workspace changes. The background color of the Ladder program changes to show that it
is now an editable area.
3. Select the On-line Edit Rungs button from the toolbar. The selected area is compared
against the same area on the PLC to ensure that they are the same. On-line edit cannot
continue until the versions are identical. More than one rung can be selected by keeping
the left-mouse button depressed and dragging the mouse over the required rungs.
4. The background color of the selected rungs changes to show that it is now an editable
area. Whilst surrounding rungs cannot be edited, they or individual items within these
rungs, can be copied into the editable area.
Note: If a checkmark has been placed by Prohibit the online operations until the PC and PLC data
matches, the following Online Action dialog box will appear so that you can select either
verifying or transferring data will be displayed.
• If Compare with PLC is selected, the program will be verified between the CX-
Programmer and the PLC before going online.
• If Transfer from PLC is selected, the program will be uploaded from the PLC
before going online.
• If Transfer to PLC is selected, the program will be downloaded to the PLC before
going online.
On-line editing can now take place, as it would be accomplished offline. The final END instruction cannot be
edited on-line.
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