NCU 710.2 segment display: L216=129

Toblakai

• 840D SL NCU730.3 PN, Siemens 6FC5373-0AA30-0AA1
• CNC SW 31-3, SW 4.5 SP4 HF4
• CompactFlash card: 6FC5851-1XG41-4YA0

Our NCU would not boot up after the machine was powered down.The 840d 7-segment display flashed the text:  L252=428.The RDY LED was solid orange. STOP and SU/PF flashed orange at 1Hz. We have already returned the machine to production by replacing the CF card, but we would like to learn more about the problem.

The only information I can find says the following:

• “Lxx=yyy:Internal error when starting NCK, “xx” is the line number in the mcsystem.ini, “yyy” is a unique error code for the code position." - (from NCU operating system IM7)

Is there any documentation regarding this internal fault? I can not find themcsystem.inifile referenced in the error description.

I ran a “sc check-cf” command through WinSCP and found:

• 3328 "bad sectors”.
• siemens/sinumerik/hmi/osal/fonts/fonts_std.cfs: read error: Input/output error
• siemens/sinumerik/hmi/appl.cfs: read error: Input/output error
• siemens/sinumerik/hmi/x3ds/turnonly.cfs: read error: Input/output error
• siemens/sinamics.cfs: read error: Input/output error
• system/x11.cfs: read error: Input/output error
• system/tcubasesys.cfs: read error: Input/output error

My questions:

1. What is this failure? Is it just a symptom of a corrupted CF card?
2. Where is mcsystem.ini located?
3. What causes ‘Bad sectors’ on the CF card and is that an indication that the card is likely to fail in the future?
4. If the 'bad sectors' are the problem, what can I do to reduce ‘bad sectors’? From five machines,this is the5^thCF card that we had to replaceover the past 5 years. None of the previous faulty cards had this L252=248 fault, but they all exhibited many 'bad sectors'.

Attachment

l252.png(125 Downloads)

Hi all,

are there any news here ?
I am facing the same problem with a slightly different display : L216=129 and it is a NCU 710.2 in my case.

Thx in advance

Best Regards

  Bernd

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Split from CF card, 840d sl 7-segment display: Lxx=yyy.

Hi all,

just to let you know : We replaced the NCU710.2 and the machine runs again.

This was the 1st time we had a defect NCU, usually in such cases the CF-Card is defect.

Best Regards

  Bernd