Terminology

State machine

A state machine is implemented in the function module. You can control the state of the state machine using commands.

State change

A command or an error leads to a state change.

State

The state indicates the current status of the state machine. You can access the state via the status word "0x8100-02 – Status word". In the status word, the state is indicated by corresponding combinations of bits.

Command

To trigger status changes, certain combinations of bits must be set in the control word "0x8100-01 – Control word". Such a combination is referred to as a command.