GERRY JERESANO Posted October 30, 2019 Report Posted October 30, 2019 Hello. I am new at Siemens Plc. My problem is after power interruption my S7 300 alarm BF 2 and BF 3 blinking And SF too. I reset the entire system but still BF2 and 3 still on blinking. What should i do. ? Thank you. Quote
sigmadelta Posted October 30, 2019 Report Posted October 30, 2019 Open STEP 7 and go online with the hardware configuration to see which Profibus or Profinet nodes are not communicating. If you don't have STEP 7 software, you have to look at all your Profibus or Profinet nodes to see if they have an error indication. BF means "bus fault", which means one or more nodes on network 2 and network 3 are not communicating. Could be a cabling problem, Ethernet switch problem, or device problem. Quote
collinsd70 Posted January 12, 2020 Report Posted January 12, 2020 On 10/30/2019 at 3:03 AM, GERRY JERESANO said: Hello. I am new at Siemens Plc. My problem is after power interruption my S7 300 alarm BF 2 and BF 3 blinking And SF too. I reset the entire system but still BF2 and 3 still on blinking. What should i do. ? Thank you. It sounds like you have a disruption to atleast 2 of your networks (or not configured). Check your Diagnostic Buffer for further information Regards Daniel. Quote
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