| 摘要 |
The invention relates to a system and a method for the maintenance of machine tools and machine controllers and relates in particular to a method in which data can be transmitted between a service computer and a machine manufacturer. A machine controller maintenance system is provided which has the following: an input communication device (2) for transmitting data, comprising a first tunnel generating device (24), which is designed to encrypt and decrypt data to be transmitted in a VPN tunneling procedure, and comprising a packet forwarding device (25) which is designed to transmit packets of a layer 3 protocol or higher of the ISO/OSI reference model between different transmission networks or to prevent the transmission of said packets; and a machine controller (4) which is designed to control a machine tool (5). The input communication device (2) can be connected to a first data network, by means of which data can be transmitted between the input communication device (2) and the first output communication device (7) across a first VPN tunnel (62) via a first communication connection (61), and the input communication device (2) can be connected to a second data network (12) via which a service computer (3) that is designed to carry out maintenance work on the machine controller (4) can be connected to the input communication device (2) via a second communication connection (31) such that data can be transmitted between the service computer (3) and the input communication device (2). The first data network and the second data network (12) are virtually separated from one another, and the packet forwarding device (2) is designed to forward data packets of the layer 3 protocol or higher of the ISO/OSI reference model from and to the service computer (3) across and from the first VPN tunnel (62) when the service computer (3) is connected to the input communication device (2). |
