Communication
10.2 PROFINET
S7-1200 Programmable controller
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4 Configuring an IP address in your project
Use the same configuration process; however, you must configure IP addresses for the HMI and the CPU.
Refer to "Device configuration: Configuring an IP address for a CPU in your project" (Page 159) for more
5 Testing the PROFINET network
You must download the configuration for each CPU and HMI device.
Refer to "Device configuration: Testing the PROFINET network" (Page 162) for more information.
Configuring logical network connections between two devices
After you configure the rack with the CPU, you are now ready to configure your network
connections.
In the Devices and Networks portal, use the "Network view" to create the network
connections between the devices in your project. First, click the "Connections" tab, and then
select the connection type with the dropdown, just to the right (for example, an ISO on TCP
connection).
To create a PROFINET connection, click the green (PROFINET) box on the first device, and
drag a line to the PROFINET box on the second device. Release the mouse button and your
PROFINET connection is joined.
Refer to "Device Configuration: Creating a network connection" (Page 149) for more
information.
A CPU can communicate with another CPU on a
network by using the TSEND_C and TRCV_C
instructions.
Consider the following when setting up communications between two CPUs:
● Configuration/Setup: Hardware configuration is required.
● Supported functions: Reading/Writing data to a peer CPU
● No Ethernet switch is required for one-to-one communications; an Ethernet switch is
required for more than two devices in a network.
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