You're reading the documentation for an older, but still supported version (1.33.4).
For information on the latest version, please have a look at 1.33.5.

5.2 Robot Initialization

The robot controller receives and processes the information needed for robot operation through the initialization of the T/P application, so a user application built with this API must check the robot operation state to confirm that initialization has completed before starting robot control.

After a normal connection is made with the robot connection functions, the completion of initialization can be checked through the TOnMonitoringStateCB callback function or by calling the get_robot_state function.