generated reports sometimes shows "No Data"
Hello to All,
I am facing a issue with the generateed reports. we are not using any controller.
we had created the logs where all the values have Good quality. However sometimes in the generated reports the values are not coming instead "NO DATA" is coming. This happens once in 10 or 12 days randomly.
Can somepne plz explain what could be the reason. we checked for all possible codition that we know of.
thanks & regards
Answers
What is the source of the log?
A log in an Information Manager historian has a Sample Blocking Rate setting which decides how often the IM log refreshes from the primary log.
With a SBR of 30 minutes, you must schedule the report 30 minute LATER in real time than the start time you use for reading the logs.
If you want to have a shift report run at 0800, 1600 and 0000 and use an IM log with SBR of 30 minutes you must schedule the report at 0830, 1630 and 0030.
Please review the following:
DataDirect gets sporadic No Data returned for OPC query to redundant CS node.
By default, the core system component CSLib will connect to up to 5 servers before determining which one is the preferred server. If a non-preferred server connects prior to a preferred one, the disconnect from the non-preferred one gets interpreted by DataDirect as “no data”. There is a fix to CSLib in SV5.1 Rev B to allow for only 1 connection.
For SV5.0, there is a registry entry that can be manually modified to prevent CSLib from connecting to more than one server. The key is StartLimit and needs to be set to 1 on any node that DataDirect might run on:
My Computer\HKEY_LOCAL_MACHINE\SOFTWARE\ABB\AFW\SystemModules\AfwCSLib\1.0-0\priva
te\StartLmit
Let me know if this information helps.
Regards,
Geof Ledin
Sorry, it appears that the text of my last entry was cut off at end of line.
By default, the core system component CSLib will connect to up to 5 servers before
determining which one is the preferred server. If a non-preferred server connects prior to a preferred one, the disconnect from the non-preferred one gets interpreted by DataDirect as “no data”. There is a fix to CSLib in SV5.1 Rev B to allow for only 1 connection.
For SV5.0, there is a registry entry that can be manually modified to prevent CSLib
from connecting to more than one server. The key is StartLimit and needs to be set to 1 on any node that DataDirect might run on:
My Computer\HKEY_LOCAL_MACHINE\SOFTWARE\ABB\AFW\
SystemModules\AfwCSLib\1.0-0\private\StartLmit
One other thing to check is to make sure that there are no NIC connections on the IM node that are Enabled and not terminated to a physical network. This may result in AfwCSLib issues that could show up in the MS Event Viewer log files. Regards, Geof
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