OPC error after downloading on controller

Hi,

After downloading on controller, next 2-to-5 minutes all values go to OPC error
on graphic display (values are frozen and equal zero). After that time values
return in normal state.
I want that after downloading on controller values are instantly equal their real-time values.
What might be the problem/solution?

Best regards

Comments (0) New comment

Luka Rank: 522

Asked 5 years ago

Answer this question Follow

Answers

Which type of controller?

Comments (2) New comment

WvanWees

Rank: 7

Answered 5 years ago

Theres a bunch of things could be wrong ...

- When did this problem first start

- Where is the problem - One controller, All controllers, is there anything special about this controller.

- How much spare memory does the controller have available

- What is the CPU load during normal running, during warmstart after download

- What is the stop time of the last download

- What is the memory quota for downloads

- How many applications are there in your controller

- Are there any errors in the OPC Server Panel during or shortly after the download

- Are you using 800xA or Compact HMI

- Do you have redundant OPC Servers

Comments (5) New comment

by Luka Rank: 522 on 11/10/2015 7:48:11 AM | Like (0) | Report

i have 9 controller in 800xA system (PM856, PM860, PM865HI..); the same happens for all controllers.
for the record, i only download on one controller. Other controllers are deactivated.

e.g. for PM860: Total System Load = 71%; Cyclic Load = 48%; Cyclic update = 5m; Memory = 50%;
Stop time=594ms; Mem quota = 90%; 1 application;

During downloading total system load = 99%. Maybe that is the main reason,
but why i must wait for that long (4,5 min)?

by Rob Lyon Rank: 2 on 11/10/2015 8:23:20 AM | Like (0) | Report

The high CPU Load during download is partly because all your control modules execute their "Start_" Code block. So you run a LOT more code during startup, especially if you do any string handling like setting descriptions, names etc.

This is normal

by Rob Lyon Rank: 2 on 11/10/2015 8:25:38 AM | Like (0) | Report

Waiting for 4-5 minutes however is not

by Rob Lyon Rank: 2 on 11/10/2015 8:28:37 AM | Like (0) | Report

You also need to answer the other questions. The way that the OPC server is reconfigured after each download depends on whether you have 800xA or compact HMI. (So if you have Compact HMI, then it does not use FSD for example )If there are problems reconfiguring the OPC Servers then may see these on the OPC Server control panel etc.

by Luka Rank: 522 on 11/11/2015 5:46:13 AM | Like (0) | Report

i have 800xa (not a compact HMI). In logs everything seems to be fine (only log from OPCServer shows its start 5 minutes after controller went to online-after downloading)
Next few days i will trying to solve this problem, or at least to find cause of this.
anyway, thanks for help!

Add new comment

Rob Lyon Rank: 2

Answered 5 years ago

Rob is absolutely correct but there are more things that could go wrong.

Immediately following a download the OPC server will be blindfolded because it need to retrieve a couple of new files from FSD. Equally, the Control Builder need to upload them there.

If CBM upload or OPC server download fail, the time with blind OPC server will be prolonged.

Check session.log from OPCServer and CBM for recent FSD failures.

Faung tracing FSD is a complex matter; please consider engaging your regional ABB support center.

Comments (0) New comment

Stefan Stromqvist AKS expert

Rank: 1

Answered 5 years ago

Solution is in document '2PAA114363-510 B' on 186. page. "If there is no connection to all controllers during a download, there could be a loss of live data in the process graphics. The time for which the live data is lost could be from a couple of seconds to minutes depending of how many Controllers have lost their connection."

Comments (0) New comment

Luka Rank: 522

Answered 5 years ago

Question details

OPC error after downloading on controller

Answers

Other questions needing answers

Related topics

AKS experts