Communication With A Programming Device; Establishing The Hardware Communications Connection - Siemens S7-1200 System Manual

Communication
10.2 PROFINET
10.2.3

Communication with a programming device

Consider the following when setting up communications between a CPU and a programming
device:
● Configuration/Setup: Hardware configuration is required.
● No Ethernet switch is required for one-to-one communications; an Ethernet switch is
required for more than two devices in a network.
10.2.3.1

Establishing the hardware communications connection

The PROFINET interfaces establish the physical connections between a programming
device and a CPU. Since Auto-Cross-Over functionality is built into the CPU, either a
standard or crossover Ethernet cable can be used for the interface. An Ethernet switch is not
required to connect a programming device directly to a CPU.
Follow the steps below to create the hardware connection between a programming device
and a CPU:
1. Install the CPU (Page 56).
2. Plug the Ethernet cable into the PROFINET port shown below.
3. Connect the Ethernet cable to the programming device.
An optional strain relief is available to strengthen the PROFINET connection.
550
①
PROFINET port
A CPU can communicate with a STEP 7
programming device on a network.
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG