Siemens SIMATIC S7-300 Hardware And Installation Manual page 142

Commissioning
Saving/Opening the Variable Table
Saving the VAT
1. After you abort or complete a test phase, you can save the variable table to
memory. The name of a variable table starts with the letters VAT, followed by a
number from 0 to 65535; e.g. VAT5.
Opening the VAT
1. Select the menu item Table > Open .
2. Select the project name in the Open dialog.
3. In the project window below, select the relevant program and mark the Blocks
container.
4. In the block window, select the desired table.
5. Confirm with OK.
Establishing a connection to the CPU
The variables of a VAT represent variable quantities of a user program. In order to
monitor or control variables it is required to establish a connection to the relevant
CPU. Every variable tables can be linked to another CPU.
In menu item PLC > Connect to ... , establish a connection to one of the following
CPUs:
• configured CPU
• directly connected CPU
• available CPU ...
The table below lists the display of variables.
CPUs
configured CPU
directly connected CPU
available CPU.
9-24
The CPU variables are displayed, ...
in their S7 program (Hardware Station) in which the VAT is
stored.
that is connected directly to the PG.
that is selected in the dialog window.
Menu item PLC > Connect to ... > Available CPU ... is
used to establish a connection to any CPU available on
the network.
S7-300 Programmable Controller Hardware and Installation
A5E00105492-02