the invention provides a method for operation of an automation system having at least one bus system connected to at least one subscriber , and having a central control system . the method includes parameterizing and / or programming the at least one bus subscriber by the central control device , identifying an interruption in the connection to the control device by the at least one bus subscriber , and controlling at least one output of the at least one bus subscriber as a function of the parameterizing and / or the programming upon identification of the interruption in the connection . the invention also provides an automation system which is suitable for carrying out the method .