如何通过以太网实现PC对PLC的编程.docVIP

QUESTION: ?What possibilites are there to connect online a PG/PC to a S7 control via Ethernet? ANSWER: ?When setting up an online connection between a PG/PC and a S7 control via industrial Ethernet there are some aspects to keep in mind. Firstly in NetPro a PG/PC must be inserted that is to show the logical connection of your PG/PCs to the Ethernet bus. Fig. 1: Inserting a PG/PC in NetPro In properties dialog you connect the PG/PC via the interface Ethernet to the Ethernet bus and assigning a IP address, which is unambiguous to the network, to the PG/PC. Note:IP addresses of the PG/PCs and S7 controls in NetPro must lie in the same range of IP addresses! Fig. 2: Configuration in NetPro The IP address that is set in Microsoft Windows control panel need not match the IP address configured in NetPro! Please mind the following three aspects when assigning Windows IP address: In Windows settings (Start Control panel Network Connections Properties Internet protocol (TCP/IP) Properties) of the PG/PCs the same or an IP address of the same subnet is set. Fig. 3: Microsoft Windows Settings Possible IP Addresses for the PG/PC: S7 Control PG/PC 192.80.30.1 192.80.30.4 - 192.80.30.254 192.80.30.3 192.80.30.2 Table 1: Possible IP Addresses of the PG Fig. 4: Possible Configuration The Windows IP address? (Start Control Panel Network Connections Properties Internet protocol (TCP/IP) Properties) of the PC lie in a different subnet than the IP address configured in NetPro. Fig. 5: Microsoft Windows Settings In this case an online connection between the control and the PG can only be implemented via an IP router. The IP router can exchange data packages between different IP subnetworks by means of a routing table. In the routing table IP addresses and subnet mask of the control and of the PG must be entered in order to have the online connection setup. Fig. 6: Connection via IP Router The Windows IP address is received automatically via a DHCP server. Fi