Legend of State Machine Diagrams

State machine diagrams are provided in this library guide for each function block to illustrate the specific behavior. The following table lists the symbols of state machine diagrams with a short description.

Symbol

Description

Black line

Functional procedure

Green line

Red line

Detected error-related procedure

Blue line

Abort procedure

Idle state (waiting for an input command).

Setting the value of an input variable.

The colors of the frames correspond to the procedure type (see lines 1...4 of this table).

Simple method, called once when a state transitions is performed.

State of the internal state machine, a specific control method is called.

Done, Error, not Busy

Return value of the specific control method (type ET_Result).