Abstract: When alarms and/or messages are present in the environment of an industrial controller, SMS messages and/or e-mails are used to send all the relevant information to a predefinable group of receivers. The selection of the information and of the group of receivers may be configured in a converter. This allows optimum service to be provided even by physically remote personnel.

Abstract: A method for transmitting messages from an industrial controller to a specified receiver using an Internet-related protocol is disclosed. An alarm indicating system generates, if a particular event occurs, event-relevant information. The event-relevant information is written to a database that is accessible to the specified receiver or recipient. Of the event-relevant information, only a message that an event has occurred is transmitted receiver-specific to a Web server. The specified receiver receives the message and accesses the event-relevant information in the database via a cryptographically protected communication protocol based on an Internet browser. Alternatively, a modem connection protected by an authentication protocol can be used instead of the Internet connection.

Abstract: The aim of the invention is to functionally improve a hydraulic play compensation element for a valve gear of an internal combustion engine. To this end, the play compensation element is characterized by the following features. Both components (4; 6) enclose a pressure chamber (7) between them, which is sealed from the exterior and which has a volume that depends on the relative position of both components (4; 6). A pressure spring (5) that presses both components (4; 6) away from one another is mounted inside the pressure chamber (7). The pressure chamber (7) can be connected to the storage chamber (8) via a spring-loaded one-way valve (10) through which media can flow exclusively into the pressure space. An additional controllable stop valve (11) is provided in the connection of the pressure chamber (7) to the storage chamber (8). A throttling channel (17), which serves as a bypass to the one-way valve (10), is provided between the pressure chamber (7) and the controllable stop valve (11).

Abstract: The aim of the invention is to functionally improve a hydraulic play compensation element for a valve gear of an internal combustion engine. To this end, the play compensation element is characterized by the following features. Both components (4; 6) enclose a pressure chamber (7) between them, which is sealed from the exterior and which has a volume that depends on the relative position of both components (4; 6). A pressure spring (5) that presses both components (4; 6) away from one another is mounted inside the pressure chamber (7). The pressure chamber (7) can be connected to the storage chamber (8) via a spring-loaded one-way valve (10) through which media can flow exclusively into the pressure space. An additional controllable stop valve (11) is provided in the connection of the pressure chamber (7) to the storage chamber (8). A throttling channel (17), which serves as a bypass to the one-way valve (10), is provided between the pressure chamber (7) and the controllable stop valve (11).