Siemens S7-300 - Page 130

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S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
9-18 A5E00203919-01
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A corresponding editing tool pops up when you open the relevant objects. Double-
click on a program block starts the program editor; the block can be edited (object-
oriented start).
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The Online Help for the active window is always called with the F1 function key.
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The STEP 7 tool "Monitoring and Controlling a Variable" lets you
• monitor program variables in any format,
• edit the status or data of variables in the CPU (controlling).
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You have two options for creating a variable table (VAT):
• in the ladder diagram/sequential function chart/statement list editor via menu
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This table is also available directly online
• in SIMATIC Manager with the %ORFNVcontainer open via menu item ,QVHUWQHZ
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This table created offline can be saved for future retrieval. You can also test it
after switching to online mode.