Monitoring And Controlling I/Os - Siemens SIMATIC S7-300 Hardware And Installation Manual

User interface
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).
Online Help
The Online Help for the active window is always called with the F1 function key.

9.6.5 Monitoring and controlling I/Os

The tool "Monitoring and Controlling a Variable"
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).
create a variable table
You have two options for creating a variable table (VAT):
• in the ladder diagram/sequential function chart/statement list editor via menu
item PLC > Monitor/control variable
This table is also available directly online
• in SIMATIC Manager with the Blocks container open via menu item Insert new
object > Variable table
This table created offline can be saved for future retrieval. You can also test it
after switching to online mode.
S7-300 Programmable Controller Hardware and Installation
A5E00105492-02
Commissioning
9-21