7.3
HMI-to-PLC communication
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
● No Ethernet switch is required for one-to-one communications; an Ethernet switch is
Supported functions:
● The HMI can read/write data to the CPU.
● Messages can be triggered, based upon information retrieved from the CPU.
● System diagnostics
S7-1200 Programmable controller
System Manual, 11/2009, A5E02486680-02
downloaded from within the project.
required for more than two devices in a network.
Note
The rack-mounted Siemens 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.
Note
WinCC Basic and STEP 7 Basic are components of the TIA Portal. Refer to WinCC Basic
for more information on configuring the HMI.
7.3 HMI-to-PLC communication
The CPU supports PROFINET
communications connections to HMIs. The
following requirements must be considered
when setting up communications between
CPUs and HMIs:
PROFINET
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