IEC 61131-3 Scripts

Help Contents


Using Fernhill SCADA, you can configure a SCADA system without any need to write scripts or code. For example the Configuration Tool allows you to do all of these actions without any scripts or code:

However you may want to extend Fernhill SCADA beyond its core features. You can use IEC 61131-3 to do this.

Using IEC 61131-3 to Extend Fernhill SCADA

Areas where IEC 61131-3 is used to to extend Fernhill SCADA:

Authoring Structured Text

You can create structured text programs using:

Debug Structured Text

You can use the IEC 61131-3 Debugger to step through and test IEC 61131-3 code.

You can start IEC 61131-3 Debugger sessions from:

Further Information


To learn about the expressions that can be used in calculated tags.


To learn about declaring Programs.


For the meaning of terms used in Fernhill SCADA.