S7-1511T: All LED's OFF and display showing "CONNECTING"
Created by: cnmautomation at: 1/26/2022 8:30 AM (2 Replies)
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| 1/26/2022 8:30 AM | |
Joined: 3/2/2015 Last visit: 1/3/2026 Posts: 67 Rating:
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Same problem here, two cpus from two different machines are down because of this. The last one used to hang intermittently, diagnostic buffer showed memory card evaluation error. When I replaced the memory card (in power off) the CPU remained in hanged state and now wont boot at all with all LED's OFF and display showing "CONNECTING" PLCs are S7-1511T ------------------------------------------------------------------------------------------ |
Last edited by: cnmautomation at: 01/26/2022 08:30:52Last edited by: Jen_Moderator at: 01/26/2022 14:01:33New subject after splitting |
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| 1/26/2022 4:26 PM | |
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Posts: 5521 Rating:
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hi, do you have access to the PLC? If no, contact the repair-center. if yes: Any information in Online&Diagnostic ro Diagnostic buffer? hope this helps, regards, |
| 1/27/2022 1:27 PM | |
Joined: 8/6/2018 Last visit: 12/19/2025 Posts: 366 Rating:
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Hi, Have you tried reloading the firmware? |
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