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Communication

Function Manual, 11/2019, A5E03735815-AH

HMI communication

Properties

Using HMI communication, one or more HMI devices (for example HMI

Basic/Comfort/Mobile Panel) exchanges data with a CPU for operator control and monitoring

with via the PROFINET or PROFIBUS DP interface. The data exchange is via HMI

connections.

If you want to set up several HMI connections to a CPU, use for example:

● The PROFINET and PROFIBUS DP interfaces of the CPU

● CPs and CMs with the relevant interfaces

Procedure for setting up HMI communication

As soon as you drag-and-drop a tag, for example a tag from a global data block into an HMI

screen or into the HMI tag table, STEP 7 automatically sets up an HMI connection.

Alternatively, you can also set up the HMI connection yourself.

To set up an HMI connection, follow these steps.

1. Configure the HMI device in an existing configuration with a CPU in the network view of

the Devices & networks editor of STEP 7.

2. Select the "Connections" button and then "HMI connection" from the drop-down list.

3. Drag-and-drop a line between the end points of the connection (HMI device and CPU).

The end points are highlighted in color. If the required S7 subnet does not yet exist, it is

created automatically.

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