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s7-300c-2dp, all LEDs blinking and can't connect PLC to PC

Created by: AliSoltani at: 8/22/2016 4:22 PM (1 Replies)

8/22/2016 4:22 PM	Rate (0)
AliSoltani Posts: 11 Rating: (0)	Hey guys! i have the same problem(All LEDs Blinking) with my s7-300c-2dp plc but i can't make any connection between plc and PC at least! i use MPI to connect with PLC but i can't! Don't you know any way to fix this problem? or have any advice for me?! ------------------------------------------------------------------------------------------ Split from All CPU LEDs Blinking and OB1.
AliSoltani Posts: 11 Rating: (0)	Last edited by: Min_Moderator at: 8/23/2016 10:29:25 AM New subject after splitting
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8/22/2016 5:45 PM	Rate (0)
Alex Mol Silver Member Joined: 9/2/2008 Last visit: 6/30/2024 Posts: 191 Rating: (43)	AliSoltani Hey guys! i have the same problem(All LEDs Blinking) with my s7-300c-2dp plc but i can't make any connection between plc and PC at least! i use MPI to connect with PLC but i can't! Don't you know any way to fix this problem? or have any advice for me?! Hello Ali, You can only communicate with the PLC when the LEDs are not blinking. Switch off the power supply to the CPU for a while and put it back on. The CPU will reboot and will go to "Stop" mode. Even if the switch is at "Run". With the PLC in stop mode you can try to establish the communication again. If you are online, directly go to the diagnostics and look what was causing the problem. It could be many things so at this moment I can't give you any straight advice. If the LEDs stay blinking after the power cut reset, try to do it without the MMC or even without Signal Modules connected. If really nothing works, it would maybe time to replace the CPU... Regards, Alex
	Last edited by: Alex Mol at: 8/22/2016 10:20:32 PM Problems don't exist, only challenges.
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