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  1. Egerer
  2. PLCnext Technology & PLCnext Controls
  3. Friday, 14 February 2020


My AXC F 2152 Controller runs with PN-Device. After Cold-Start the IP-Adress from the controller changed back to as it was at beginnung.

I can change the IP-Adresse e. g. with network manager back to and everything works fine again. But after cold-start it changed again back to ...18.26.

What could be the reason for that.

I use the latest FW on the controller, as in PLCnext Engineer.


Martin PLCnext Team Accepted Answer Pending Moderation

Hello Bernd,

Sorry for the delay.

If I understand correctly, the AXC F 2152 is acting as a Profinet device?

If so, what device is acting as the Profinet Controller in the network?

My understanding is that the names of all Profinet devices are specified in the Controller, along with the IP addresses that should be assigned to those devices. When the relationship is established between the controller and a device, the controller will check the name of the device, and then assign the specified IP address to that device. So ... what IP address is specified for the AXC F 2152 in the Profinet Controller? If it is, then this would explain what you are seeing.

~ Martin.

Phoenix Contact Electronics Headquarters - PLCnext Runtime Product Management and Support

Egerer Accepted Answer Pending Moderation

Hello Martin,

the reason was simple.

I used "net names" to change IP-adress and name of the axc f 2152.

The default settings is "store the ip-adress not permament" that means after restarting the controller, the old IP-adress an name appears.


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