An optimal plant overview through decentralized process fields – here through SIMATIC PCS 7 TeleControl, the external stations are integrated into SIMATIC PCS 7 so that the operator is not aware of any difference between central and remote automation in terms of operating philosophy and alarm characteristics. At the same time, SIMATIC PCS 7 TeleControl can not only incorporate newly designed remote terminal units into the control system environment but also migrate sub-systems in the external fields. SIMATIC PCS 7 TeleControl also makes it easier to set up hierarchical system configurations.