How to communicate with touch screen?

Thank for your answer. 

One more question that how to communication btw touch screen? because there is IP address communication. but 400H has different IP address...

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Split from question about redundant Ethernet configuration .

Hello aisan;

Do you mean your HMI IP address is on a different subnet than your H-CPUs?

Have a look at this document then:

Is cross-subnet communication  over Profinet possible?

https://support.industry.siemens.com/cs/my/en/view/109479139

You will find different suggestions to connect your HMI, such as a router, a PN-PN coupler... You will have to design a MRP connection adequately when adding such equipment (it might be easuer to simply chage the subnet of the HMI)

Hope this helps,

Daniel Chartier

Hello sir,

400h has unique IP address like 414-5h has 192.168.0.1 and another 414-5h has 192.168.0.2.

HMI has 192.168.0.3

When change primary CPU to secondary CPU the IP address will be also activity 192.168.0.1 to 192.168.0.2

In this case, How to communication with HMI?   

Hello aisan;

Establishing a connection between an HMI panel (Siemens) t with a S7-400H redundant system is discussed in this document:

Connecting SIMATIC HMI panels with a SIMATIC S7-400H (WinCC V16 and STEP 7 V5.6)

https://support.industry.siemens.com/cs/ww/en/view/96837136

Note that the proposed solutions will depend on the type (family) of HMI you are planning to use.

Hope this helps,

Daniel Chartier