General

The sections in Sequential Function Chart language are made up of:

• a main chart programmed in SFC

• macro steps (MS) programmed in SFC

• actions and transitions programmed in LD, FBD, ST, or IL

The SFC sections are programmable only in the master task (see detailed description of SFC sections)

Example

The following diagram gives an example of the structure of an SFC section, and uses the chart to show the macro step calls that are used.