parameter losing value

Ed Schippers 5 years ago in IQANdesign updated by Gustav Widén (System support) 5 years ago 1

We have two machined with MD4-7.

In one machine a state parameter was spontaneously set to default after a restart.

The other machine lost all parameter settings, all went to default.

After setting the parameters again all was ok and the setting did not reset anymore (so far i know)

These setting can only de changed via an pin protected menu, no channels are used.

Are there any outside influences that can do something with the internal memory that can cause these problems?

Also I don't exclude tempering either.

regards, Ed

Does the system log show any record of checksum error for these parameters?

The fallback in case of a corrupted parameter is the application default, but getting settings corrupted in the first place should be extremely unlikely. 

I don't know what sort of external influence it would take to destroy the settings. 

Do you know what software version the MD4 running at the time? 
It would be interesting to know to know if it was before or after 5.01.32 ? See case 38940 in release notes: