Pco query creation error

[hasila_amjath]

Hi ,

while creating Pco query..

i have a list of available servers..

when i select the respective server which i have to connect

Modes are not displayed :

it shows connection refused : connect

but in data servers : theere are two things one is pco connector and other one is pco simulator

when i select pco simulator i get the tag retrival mode

but when i select Pco connector -type server , no modes are displayed..

what could be the problem..

when i run the query with pco simulator selected i get a java error..

kindly help me with ur inputs..

regards

i have the screen shots for reference

[Private_Member_14935 · Accepted solution]

Hi Hasila,

In case the PCo agent that the PCo Connector points to is down then it would result in the error connection refused  : connect while displaying the modes. Hence you could check to see if the agent is running or not.

You mentioned that while running the query with PCo Simulator you got a Java error. Could you specify the exact error that you are getting.

Thanks and Best Regards,

Ria

[hasila_amjath · Accepted solution]

Thanks ria,

the agents were not active...

now i could see the list in the modes.

but when i run the query..

i get message : reading tag resulted in status bad

can u pls help me with this..

thanks and regards

hasila

[Former Member · Accepted solution]

Hi Hasila,

Could you please give more details about the issue, looking to the error it seems that you trying to get any tags values from historian using PCo query.

Below are may be the issues

1. Tag doesnot exits or its a wrong Tag

2. For that particular time range values for that tags are not present

3. Historian server's must be running out of memory and hence PCo unable to read values

You can try by giving a long date range with view as "EVENT" if you get multiple values or even a singe value in this time range then it can be concluded that for that specific time values were not present in Historian DB.

Please try this and share the results

[hasila_amjath · Accepted solution]

Hi mahesh,

thanks for ur suggestion..

yes actually  tags were bad..

the machines were down because of power problem..

now things r fine..

regards

hasila