S5- 115U CPU-943B in Stop Mode With Error LED QVC and BASP

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vicyubal
Posts: 1
Joined: Sun Feb 13, 2011 8:17 am

S5- 115U CPU-943B in Stop Mode With Error LED QVC and BASP

Post by vicyubal » Sun Feb 13, 2011 8:51 am

I have S5 System which CPU is 115U CPU-943B,
It is running for several years but suddenly it stops with ERROR LEDS light on STOP, QVC and BASP.
With this problem, I resetted it completly by unpowering the CPU, removing the back-up batteries & EPROM for 10 mins and power it again.
BY powering it again, I reset the CPU by holding the switch to "OR" mode and clicking the "RUN/STOP" key switch 3-4 times.
The error was gone and I inserted again the EPROM and dowloaded the backup PLC program but it backs again to "STOP" mode with the same error.
So, How can I put back this CPU to running condition.

Thanks,

Vic

kriztof
Posts: 96
Joined: Fri Nov 16, 2007 3:18 pm
Location: Europe

Re: S5- 115U CPU-943B in Stop Mode With Error LED QVC and BA

Post by kriztof » Sun Feb 13, 2011 9:09 am

QVZ is triggered when CPU can't access I/O module (this error occurs if a module fails to acknowledge within 160 µs of being
accessed). I suggest you to create empty OB23 and upload to CPU. If CPU will run then you should replace faulty card. For detailed diagnostic you should check also ISTACK.

dekor
Posts: 114
Joined: Wed Jan 03, 2007 9:10 pm
Location: Europe

Re: S5- 115U CPU-943B in Stop Mode With Error LED QVC and BA

Post by dekor » Sun Feb 13, 2011 2:57 pm

Dear friend,
from my experience,
1. I suggest you to check if the cards are powered by power supply.
2. I meet several times poor connection on rack.

Good luck.
dekor

Serge_n
Posts: 131
Joined: Tue Feb 27, 2007 7:57 pm
Location: South Ukraine

Re: S5- 115U CPU-943B in Stop Mode With Error LED QVC and BA

Post by Serge_n » Sun Feb 13, 2011 4:41 pm

vicyubal wrote:... BY powering it again, I reset the CPU by holding the switch to "OR" mode and clicking the "RUN/STOP" key switch 3-4 times. ...
Do the same with the inserted module EPROM.

hasnan86
Posts: 1
Joined: Thu Dec 12, 2013 4:16 am

Re: S5- 115U CPU-943B in Stop Mode With Error LED QVC and BA

Post by hasnan86 » Thu Dec 12, 2013 5:36 am

Good day everyone, i had faced the same problem like vicyubal with my S5 CPU-115U 493B plc. I had try the recommended which had given in this topic and i replaced with the new CPU but i still get the same problem occur. What can i traced that 2 of function block (FB) had made the QVZ LED appear. Before this, I had upload the block stage by stage (e.g OB,PB,DB & FB) into the CPU.

1) Upload all OB-->No QVZ fault-->start PLC=OK
2) Upload all PB-->No QVZ fault-->start PLC=OK
3) Upload all DB-->No QVZ fault--> start PLC=OK
4) Upload all FB-->2 of all FB had made the QVZ LED appeared while uploading even tough the 2 FB had programmed inside it -->start PLC=ISTACK
5) Check backup battery=OK,Tried change new battery and re-upload program from stage 1 until 4=still have QVZ fault.
6) Compared between programming inside the CPU with the source (PC)= No error comparison.

My questions are how to analyze the ISTACK and could it be the FB problem caused the QVZ fault and how the FB can caused QVZ?

Serge_n
Posts: 131
Joined: Tue Feb 27, 2007 7:57 pm
Location: South Ukraine

Re: S5- 115U CPU-943B in Stop Mode With Error LED QVC and BA

Post by Serge_n » Thu Dec 12, 2013 11:53 am

hasnan86 wrote:4) Upload all FB-->2 of all FB had made the QVZ LED appeared while uploading even tough the 2 FB had programmed inside it -->start PLC=ISTACK
Which numbers FB?

dekor
Posts: 114
Joined: Wed Jan 03, 2007 9:10 pm
Location: Europe

Re: S5- 115U CPU-943B in Stop Mode With Error LED QVC and BA

Post by dekor » Sat Dec 14, 2013 5:55 am

Hi
have you check condition : missing caled DB?
Try to have a look at program structure.
dekor.

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