Summary of PLC shortcut keys for Siemens/Mitsubishi/Omron

Use the following steps to check your ladder program:

	1) Confirm that the ladder program is displayed in the diagram workspace.
	2) Select the View Local Symbols View button on the toolbar to switch to the symbol table. Select the Show Address References button from the toolbar to activate the Address References tool.
	3) Check each symbol's usage in the program by selecting it and displaying the Address Reference tool or by moving the cursor in the diagram.

You can also view the Ladder view in Mnemonic view. You can enter a block program by displaying a rung in Mnemonic view or in the Ladder editor.

Select the Mnemonic View button in the toolbar to activate the Mnemonic view. To enter mnemonic instructions directly in the Ladder Editor, select View as Statements for the relevant rung.

(3) Compiler

Both online and offline programs are constantly checked during their creation and editing. Program errors appear as red lines in the ladder diagram. If an error occurs in a rung, a red line appears to the right of the ladder diagram rung. This situation occurs, for example, when an element has been placed in the diagram window, but no symbol and address have been assigned.

Follow these steps to compile the program:

To list all errors in the program, press the right mouse button and select the Compile Program button in the toolbar. The output (such as compilation progress or error details) will be displayed under the Compile tab in the Output window.

3. Download the program to PLC

Follow these steps to download a program to the PLC:

	1) Select the Save Project button in the toolbar to save the current project. If the project has not been saved before, the Save CX-Programmer File dialog box will be displayed. Enter the file name in the File Name field and select the Save button to complete the save operation.
	2) Select the online work button in the toolbar to connect to the PLC. A confirmation dialog box will appear, select the confirmation button. Since editing is generally not allowed when online, the program will turn gray.
	3) 3) Select the program object in the project workspace.
	4) 4) Select the Program Mode button in the toolbar and set the PLC's operating mode to Programming. If this step is not done, CX-Programmer will automatically set the PLC to this mode.
	5) 5) Select the Download button on the toolbar and the Download Options dialog box will be displayed.
	6) 6) Set the program bar and click the Confirm button.

4. Transferring programs from PLC

Follow the steps below to upload the PLC program.

	1) Select the PLC object in the project workspace.
	2) Select the Upload button in the toolbar. The first program in the project tree will be compiled. If the PLC is offline, a confirmation dialog box will be displayed. Select the Confirm button to connect to the PLC. The Upload dialog box will be displayed.
	3) Set the program bar and select the Confirm button.

5. Comparison between engineering program and PLC program

Follow the steps below to compare the engineering program and the PLC program.

	1) Select the PLC object in the project workspace.
	2) Select the Compare with PLC button in the toolbar and the Compare Options dialog box will be displayed.
	3) In the Settings Program column, select the Confirm button. The Compare dialog box will be displayed.

6. Monitor the program while it is executing

Once the program is downloaded, its operation can be monitored in the Chart Workspace (in the form of a simulated display). Follow the steps below to monitor the program.

	1) Select the PLC object in the project workspace
	2) Select the Toggle PLC Monitoring button in the Project toolbar. 3) While the program is executing, you can monitor the data and control flow in the ladder diagram, for example, the selection of connections and the increment of values.

7. Online Editing

Although the downloaded program has been grayed out to prevent direct editing, it is still possible to select the online editing feature to modify the ladder program. When using the online editing feature, it is usually necessary to run the PLC in "Monitor" mode. Online editing is not possible in "Run" mode. Use the following steps to perform online editing.

	1) Drag the mouse to select the step to be edited.
	2) Select the Compare with PLC button in the toolbar to confirm that the contents of the editing area are the same as those in the PLC.
	3) Select the Online Edit Rung button in the toolbar. The background of the rung will change, indicating that it is now an editable area. Rungs outside this area cannot be changed, but the elements in these rungs can be copied to the editable rungs.
	4) Edit the ladder.
	5) When you are satisfied with the result, select the Transfer Online Edit Changes button in the toolbar and the edited content will be checked and transferred to the PLC.
	6) Once the changes have been transferred to the PLC, the edit area becomes read-only again. Select the Cancel Online Editing button in the toolbar to cancel any online edits made before confirming the changes.