Hi,

At the moment I have a PLC and HMI that don't communicate with each other. 

PLC (6ES7 214-1AG40-0XB0)

HMI ( 6AV2 123-2DBB03-0AB0)

Tia Portal V17

I can update the software of both the HMI and the PLC through my laptop (and they are both online at the same time) . But there is no data exchange between the two. The I/O fields have ### and the buttons don't work.

This problems also occurs when the HMI and PLC are connected directly.

How can I solve this?

Kind regards,

Willem

Hi,

at a first short test you can check this setting.

Why is it not possible to establish a connection to a CPU with firmware version 2.9/4.5 from an HMI panel (Basic, Comfort or Unified) or WinCC Runtime Advanced V17 or lower?

regards

sancruz

Hi

In these cases, you need to know the following information to see if you can find where the problem is:

- Does the date and time configured in the PLC and HMI match?

- Within the PLC properties, is there any HMI access protection configured with a password? If so, has this password been set in the "HMI connection" so that the panel can access it?

- In the PLC variables table, do the variables that it shares with the HMI have the "Accessible from HMI/OPC" and "Writable from HMI/OPC" checks marked?

On the other hand, I leave you a series of links that may be of interest to find the problem, I share them below:

"No connection to PLC after WinCC Panel Images V17 Update 6"

"In WinCC (TIA Portal), how do you configure a connection between WinCC Runtime Advanced or HMI Panel and an S7 controller over Industrial Ethernet (PROFINET)?"

"Why is it not possible to establish a connection to a CPU with firmware version 2.9/4.5 from an HMI panel (Basic, Comfort or Unified) or WinCC Runtime Advanced V17 or lower?"

Can you review and comment?

Best regards!

Hi,

Thank you!! Unchecking the 'only allow secure PG/PC and HMI communication' solved it.

Kind regards,

Willem