With which devices can the S7-1200 communicate via the integrated PROFINET interface and which protocols does the S7-1200 support?
Communication partners of the S7-1200
The S7-1200 CPU communicates with the devices below via the integrated PROFINET interface:
- Other S7-CPUs (S7-200, S7-300, S7-400, S7-1200 and S7-1500)
- Programming devices
- HMI devices (like SIMATIC Basic Panels and SIMATIC Comfort Panels)
- Devices which support open user communication
Maximum number of simultaneous, asynchronous communication connections
The S7-1200 CPU supports the following maximum number of simultaneous, asynchronous communication connections:
|Connection type||Description and max. number of connections|
|Open user communication||The S7-1200 CPU supports 8 connections for open user communications (active or passive) using the following instructions: T_SEND_C, T_RECV_C, TCON, TDISCON, TSEND and TRECV. |
|S7 communication|| |
Firmware V2 and V3
|PG connections||The S7-1200 CPU provides connections to support 1 programming device (PG).|
|Web server connections (HTTP)||The S7-1200 provides connections for the web server.|
PROFINET and PROFIBUS
- S7-1200 CPU with firmware version V2.02 to V2.2
For PROFINET the S7-1200 CPU supports a maximum of 8 PROFINET IO devices and 128 submodules, whichever is reached first. PROFIBUS supports a maximum of 16 DP slaves on one DP master with a maximum of 256 submodules per DP slave.
A maximum of 16 DP slaves and IO devices altogether is supported.
- S7-1200 CPU with firmware version V3.0 or higher
With firmware version V3.0 and higher the S7-1200 CPU supports 16 PROFINET IO devices with a maximum of 256 submodules. PROFIBUS supports 32 DP slaves with a maximum of 512 submodules per DP slave.
Integrated PROFINET interface of the S7-1200
The integrated PROFINET interface of the S7-1200 CPU is implemented as an RJ45 socket.
The S7-1200 supports the following protocols via the integrated PROFINET interface:
|ISO on TCP (RFC 1006)||V1.0|
|PROFINET RT - Basic Services and IO Controller||V2.0|
|PROFINET IO Device||V4.0|
|S7 Communication (S7 Server)||V1.0|
|S7 Communication with the PUT/GET instructions (S7 client)||V2.0|
|HTTP - Hyper Text Transfer Protocol||V2.0|
|HTTPS - Hyper Text Transfer Protocol Secure||V2.0|
|SNMP - Simple Network Management Protocol||V2.0|
|LLDP - Link Layer Discovery Protocol||V2.0|
|DCP - Discovery & Configuration Protocol||V2.0|
|NTP - Network Time Protocol||V2.0|
|ARP - Address Resolution Protocol||V2.0|
More information about communication with the S7-1200 CPU is available in the S7-1200 manual in Entry ID: 91696622.