Instructions:
You can connect your controller to various subnetworks depending on which S7-300/400 CPU or CP you are using. The following types of connection/protocols can be used for these subnetworks.
| Subnet |
Connection types/Protocols |
MPI
(Multiple Protocol Interface) |
S7 communication (S7-300 only as a server)
GD communication (global data communication)
S7 basic communication |
| PROFIBUS |
DP distributed I/O
(via an integrated port, CP342-5 and CP443-5 extended)
FMS - Field bus message specification
(via CP343-5 and CP443-5 Basic)
FDL - Field bus data link
(only via PROFIBUS CP)
S7 communication (S7-300 only as a server1)) |
| Industrial Ethernet / PROFINET |
S7 communication
(via an Ethernet CP or integrated PN interface)
ISO transport(via Ethernet CP)
ISO-on-TCP (via Ethernet CP or an integrated PN interface)
TCP (via Ethernet CP or an integrated PN interface)
UDP (via Ethernet CP or an integrated PN interface)
E-mail (via Ethernet CP)
FTP (via Ethernet CP)
PROFINET IO (via Ethernet CP or an integrated PN interface)
CBA (via Ethernet CP or an integrated PN interface)
MODBUS TCP(via Ethernet CPs or integrated PN interface, see Entry ID: 22660304 2)) |
| PTP (point-to-point) |
RK 512
3964(R)
ASCII
various print drivers
Modbus (RTU) (master/slave) 2)
Data highway DF1 2)
... |
1) S7 300: Client functionality only via CP342-5 from FW V5.2
2) These types of connection/protocol cannot be configured as standard in STEP 7 and must be installed afterwards.
The manuals on the Ethernet or PROFIBUS CPs tell you which communication services they support.
Furthermore, the following entries contain an overview of the communication services for S7-300/400 Ethernet CPs and S7-300/400 CPUs with integrated PN interface.
| Module |
Entry ID |
| S7-400 Ethernet CPs |
15368142 |
| S7-300 Ethernet CPs |
16767769 |
| S7-300/400 CPUs with an integrated PN interface |
18909487 |
The "Technical Data" chapter of the manuals on the S7 300/400 CPUs describe which communication services can be used via the integrated interfaces in the controllers:
| Module |
Entry ID |
| CPU S7 300 |
12996906 |
CPU S7 400
(without an integrated PN interface) |
14016796 |
CPU S7 400
(with an integrated PN interface) |
23904550 |
Note about S7 communication:
The S7-300 supports S7 communication via the FB14/15 "GET/PUT", FB12/13 "BSEND/BRCV" or FB8/9 "USEND/URCV" function blocks. It works via:
- the integrated PN interface with the function blocks from the Standard Library -> Communication Blocks.
- CPs with the function blocks from the SIMATIC_NET_CP library.
In the S7-400, data exchange takes place via the SFB14/15 "GET/PUT", SFB12/13 "BSEND/BRCV" or SFB8/9 "USEND/URCV" function blocks. They can be found in the Standard Library -> System Function Block
Note about communication via the integrated PN interface of the CPU:
Data exchange by means of TCP, ISO-on-TCP and UDP protocols takes place via open IE communication. The connection and data exchange are configured via the following communication blocks:
- UDT 65 "TCON_PAR" with the data structure for assigning parameters to the connection
- UDT 66 "TCON_ADR" with the data structure of the addressing parameters of the remote partner (UDP)
- FB 65 "TCON" for establishing the connection
- FB 66 "TCON" for clearing down the connection
- FB 63 "TSEND" for transmitting data via TCP and ISO-on-TCP
- FB 64 "TRCV" for receiving data via TCP and ISO-on-TCP
- FB 67 "TUSEND" for transmitting data via UDP
- FB 68 "TURCV" for receiving data via UDP
You can find further information about the programming and use of the individual types of connection in the following manuals.
| Manual |
Entry ID |
System software for S7-300/400
System and standard functions |
1214574
S7 basic communication
S7 communication
Open communication via Industrial Ethernet
PROFINET I/O (SFC 14/15 ("DPRD_DAT/DPWR_DAT") |
S7-CPs for PROFIBUS
Configuration and commissioning |
1158693
SEND/RECEIVE communication via an FDL connection
DP
FMS |
S7-CPs for Industrial Ethernet
Configuration and commissioning |
8777865
SEND/RECEIVE communication via
ISO-on-TCP, TCP, UDP or ISO transport connection
PROFINET I/O (FC 9/10 "PNIO_SEND/PNIO_RECV") |
Information technology in a
SIMATIC S7 with CP 343–1 IT / CP 343–1 IT GX20 and CP 443–1 IT |
1172744
FTP, E-MAIL |
PROFINET IO
From PROFIBUS DP to PROFINET IO
Programming manual |
19289930 |
| 
german
