Log File gives wrong values after power failure

Hi,

I am using OBA8 controller and it is powered on 24X7 and would like to log the input and output data contineusly. when i tested it on my controller it was giving me good results untill there is a power failure.

once the power failure occurs it starts giving me odd values. i had attached the excell file which shows the values given by PLC

And I would like to inform you that there is no initialisation button present in the circuit because it should be up and running as soon as the power resmes.

Thanks in advance.

Finally found out that it was a bug in LOGO8

and Siemens need to solve it and give me a solution.

waiting for it since long time

Hi there, 

Have you got any solution till date?

Because myself also faced the same issue. The logged data was inconsistent after a power failure. 

Thank you.

 Hi ixo65,

Can i know what you mean by "Siemens published no change log with a new firmware"?.

ixo65

 

karthikk

Hi there, 

Have you got any solution till date?

Because myself also faced the same issue. The logged data was inconsistent after a power failure. 

Thank you.

A correction of the error (if it is ever made of Siemens) would be possible only with a new firmware.
Since you can not perform a firmware update with a logo, it would mean that you would have to buy a new logo.

In addition, Siemens published no change log with a new firmware.
How would you then know that the problem is solved?
Simply a new logo buy and try?