Instructions

Variables
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To create a variable, select the empty row in the table, enter the variable name and select
its data type. Other parameters are optional. The created variable can be used in the pro-
ject.
Use the item Show references in the variable context menu to see where the variable is
used in the project.
Fig. 5.5
In the dialog window References to the variable select the reference you want to delete
and click Delete.
To remove the variable from the table, use the item Delete variable in its context menu.
5.4 Service variables
Service variables are associated with the device settings and can differ, depending on the
device. Service variables are related to the hardware features, such as real-time clock,
interface card in the slot etc. and cannot be deleted. Access rights to service variables
may be limited.
The service variables are listed in the variable table under the tab Service.
The blocks of service variables are shown in the circuit program with a gray background.
Fig. 5.6 Service variables in the table
Fig. 5.7 Service variables in diagram
5.5 Network variables
Each interface slot has a separate tab in the table.
If the interface is configured as a master, there are separate tabs for each Slave device
within the slot tab (Fig. 5.8). The Slave tab contains the variables to be requested for this
Slave device.