s7-1200 error led blinks

Erdikaban

Hello,

I'm having the same problem but unresolved.My connection are correct.There is an error.Why?

 hi Erdikaban,

when you project a topology in the topology-view, the wiring of the network must be port by port as it is projected.

If you don´t need to topology because of an function that needs it, I recommend you to delete topology.

hope this helps,

regards,

Hi,

try to put off the topology-connection of HMI if it´s not projected as io-Device.

Check red connection again and use another free Slot of Switch.

Regards,

Towome

Erdikaban

Same error after deleting. I use 3 axis step motor driver in my project. I dont need topology but same error. 
Screenshot:
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 Did you also load the changed configuration to the CPU?

right-click on CPU -> Download to device -> Hardwareconfiguration

hope this helps,

regards,