Siemens SIMATIC S7-1200

Communication
11.2 PROFINET
S7-1200 Programmable controller
916 System Manual, V4.2, 09/2016, A5E02486680-AK
11.2.10
HMI-to-PLC communication
The CPU supports PROFINET communic
a-
tions connections to
HMIs (Page 32). The
fo
llowing requirements must be considered
when setting up communica
tions between
CPUs and HMIs:
Configuration/Setup:
● The PROFINET port of the CPU must be configured to connect with the HMI.
● The HMI must be setup and configured.
● The HMI configuration information is part of the CPU project and can be configured and
downloaded from within the project.
● No Ethernet switch is required for one-to-one communications; an Ethernet switch is
required for more than two devices in a network.
Note
The rack
-mounted CSM1277 4-port Ethernet switch can be used to connect your CPUs
and HMI devices. The PROFINET port on the CPU does not contain an Ethernet
switching device.
Supported functions:
● The HMI can read/write data to the CPU.
● Messages can be triggered, based upon information retrieved from the CPU.
● System diagnostics