Communication via Ethernet CPs in S7 Stations
Notes on S7 communication between PC/PG station and S7 station
Applications in a PC/PG station communicate with the S7 station over an OPC interface or
The S7 stations use the integrated communication SFBs/FBs (client and server functionality at both ends).
The following general requirements must be met by a PC/PG station for S7 communication:
SOn the PC/PG:
–an Ethernet CP installed
–there is an interface for S7 communication installed: SOFTNET S7 for Ind. Ethernet or
SThe CPs in the S7 stations are supplied with a MAC/IP address (use the default MAC address or set an IP address).
To use S7 communication with the SIMATIC S7 PLC from a PC, address the required CPU module in the SIMATIC S7 PLC that you want to communicate with in your PC application.
S7 communication via routers
It is possible to reach the S7 station from an application (OPC server) of the PC/PG station that is attached to another subnet. The subnets must be connected over a router such as the IE/PB Link. An S7 station or a PC connected to both subnets can also serve as a router.
In this configuration, the S7 station can only be addressed by the PC/PG station as a communications server on S7 connections configured at one end.
The requirements for the configuration of the PC/PG station are identical to those for operation in the same subnet (see above); the CP in the PC/PG station must also have routing capability.
In this situation, configure a
26 | SIMATIC NET NCM S7 for Industrial Ethernet |