10/22/2015 12:23 AM | |
Joined: 3/25/2008 Last visit: 1/28/2022 Posts: 232 Rating:
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In our machine the central processor is an S7-416, we have 1 Profnet network attached to the Profinet IO Port of our central CPU, there are several IM151-3PN HF (6ES7151-3BA23-0AB0), attached to the profinet network, in one of this IM's (device number in the profinet network is 1, the IP addres asignet to this IM is 172.16.184.30, and device name is MH-HK1) the following condition has been detected several times in the last days:
1. All the IO cards and PM's that are attached to this IM shows SF LED on. 2. IM does not show any SF LED ON, nor BF LED ON or Flashing, PWR LED is lit, also PRT2 LED is on (Our profinet cable is plugged in port 2). 3. By checking HW status online, we do not see any IM or IO module faulty. 4. By checking diagnostics buffer in the CPU, there is not any register of a fault event related to this specific IM. 5. CPU does not go to Stop due to this event. The machine stops because it miss some IO's, that when missing trigger fault events in the program. 6. The SF LED ON status remains until power is cycled to the whole IM. 7. By cycling the power to the IM, SF LED's get to OFF, and CPU goes to stop Mode. 8. We trigger a Warm restart, reset all faults and start running again.
Based on this breif description would you please help us to: a. Suggest a root cause for this behaviour. b. Suggest some corrective actions to prevent this (Change IM, clean and review backplane connections). c. Do you have heard about simillar problem? d. Any other advice or suggestion you may like to shere with us? I'm attaching a PDF doc which contains images of the HW online status at the moment the fault was present.
Thanks a lot for your help Have great evening/day. AttachmentS7400_Report.pdf (114 Downloads) |
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