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OPC client
2 days 10 minutes ago #210
by jds
Replied by jds on topic OPC client
Hello,
In the meantime I did some more testing and some more strange behaivior.
As for now, this is the only way I can get it to work:
I read 1 float and one bool. If I read only the float, it works. When I add the bool, everything stops, but adding the bool the second time everything works back again.
But ... when trying to add a new float, bool, or whatever, everything stops working (also when trying to add them double). I does one read of the values for the first 2 items, the rest can't get their values.
In the OPC client, I see all the requests (callbacks) and it starts to puts out all its values, but they aren't received by Proview.
A second strange issue: when the OPC server quits, Proviewr seems to hang. When the server gets back up, no new values are fetched, probably because the callback is lost and never build up again.
I think the OPC client isn't production safe for the moment with this behaivior even if the value are informal. Is it usefull to put energy in the client or is this a path to leave?
In the meantime I did some more testing and some more strange behaivior.
As for now, this is the only way I can get it to work:
I read 1 float and one bool. If I read only the float, it works. When I add the bool, everything stops, but adding the bool the second time everything works back again.
But ... when trying to add a new float, bool, or whatever, everything stops working (also when trying to add them double). I does one read of the values for the first 2 items, the rest can't get their values.
In the OPC client, I see all the requests (callbacks) and it starts to puts out all its values, but they aren't received by Proview.
A second strange issue: when the OPC server quits, Proviewr seems to hang. When the server gets back up, no new values are fetched, probably because the callback is lost and never build up again.
I think the OPC client isn't production safe for the moment with this behaivior even if the value are informal. Is it usefull to put energy in the client or is this a path to leave?
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2 hours 42 minutes ago #211
by claes
Replied by claes on topic OPC client
Hi jds,
We have used the OPC XML-DA server in production but never the client. I remember there where also some syntax issue where the specification for XML-DA 1.0 wasn't crystal clear and could be interpreted in different ways. We tested the server with different gateways and with some it worked and with some it didn't. I guess it could be the same problem with the client.
/Claes
We have used the OPC XML-DA server in production but never the client. I remember there where also some syntax issue where the specification for XML-DA 1.0 wasn't crystal clear and could be interpreted in different ways. We tested the server with different gateways and with some it worked and with some it didn't. I guess it could be the same problem with the client.
/Claes
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