Method for transmitting data inside an industrial automation system, in which - the industrial automation system comprises a plurality of cells having in each case a group of automation devices comprising exclusively IPv4-based communication devices and in each case a subnetwork control device, wherein the subnetwork control device is connected to the automation devices via a cell-specific subnetwork and controls and/or monitors said automation devices, - a name or configuration service component of the subnetwork control device acquires IPv4 addresses and associated device names for the group of automation devices, - the subnetwork control device respectively calculates an IPv6 address for the group of automation devices from an IPv6 prefix assigned to the subnetwork and the IPv4 addresses of the automation devices, - a name service agent of the subnetwork control device requests acquisition of the calculated IPv6 addresses and the associated device names for the group of automation devices which are controlled and/or monitored by the subnetwork control device in at least one superordinate name service server of the industrial automation system, - the calculated IPv6 addresses and the associated device names are stored in the superordinate name service server in the event of a successful request, - address translation rules are determined for the group of automation devices from the IPv4 addresses of the automation devices and the calculated IPv6 addresses, - the determined address translation rules are used for address translation between IPv4 addresses and IPv6 addresses by an address translation unit of the subnetwork control device. - the industrial automation system comprises a plurality of cells having in each case a group of automation devices comprising exclusively IPv4-based communication devices and in each case a subnetwork control device, wherein the subnetwork control device is connected to the automation devices via a cell-specific subnetwork and controls and/or monitors said automation devices, - a name or configuration service component of the subnetwork control device acquires IPv4 addresses and associated device names for the group of automation devices, - the subnetwork control device respectively calculates an IPv6 address for the group of automation devices from an IPv6 prefix assigned to the subnetwork and the IPv4 addresses of the automation devices, - a name service agent of the subnetwork control device requests acquisition of the calculated IPv6 addresses and the associated device names for the group of automation devices which are controlled and/or monitored by the subnetwork control device in at least one superordinate name service server of the industrial automation system, - the calculated IPv6 addresses and the associated device names are stored in the superordinate name service server in the event of a successful request, - address translation rules are determined for the group of automation devices from the IPv4 addresses of the automation devices and the calculated IPv6 addresses, - the determined address translation rules are used for address translation between IPv4 addresses and IPv6 addresses by an address translation unit of the subnetwork control device.