DASSidirect connection from SMC to System Platform objects. Frozen values in runtime.

Hi everyone,

I use SMC/DASSidirect driver for connecting to PLC's and mapping to system platform. We have been experienciencing object values freezing in runtime but still values showing green in the SMC and when validating references in the I/O mapping window in Syst,Platform. In the object viewer the values dont move.

When doing a reset on the PLC conneciton in the SMC the values start moving again. Normally when the connection is down you would not see green values in the SMC, this is what puzzles me.

Anyone experienced this? and also is there a way to script something that sends a reset command to the SMC or something along that line?

regards

Jakob

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0 Jakob Agustsson 8 months ago

Hi, thank you so much for your reply.

I am using the driver called, ArchestrA.DASSIDirect.3 in the SMC, we also have the possibiltiy to use the OI.SIDIR.1. but we have been sticking to the DASSIdirect.

I am using the OPC object to connect to the application server.

System platform version. 20.1.001 6050.1213.6532.1

It was showing as a solid green box, WITH live values, but the runtime values in application server had not been moving for at least 24h (saw that in historian as a straight line).

Usually when there is a connectivity issue there is some kind of indication in the SMC, like the forementioned red x in the corner, thats why i find this odd.

regarding the logger, could you please guide me to the relevant component, would the DASSIDIRECT component be the only one or also any other that would be interesting to look at?

Also if anyone knows a way to automise through scripting a reset command to the smc connection, It would be interesting to learn,

Thank you!
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0 Richard Köhlerstrand 8 months ago in reply to Jakob Agustsson

I also found this post on the support page

DasSIDirect topic goes stale and does not update tags

and this:

Some items not refreshing with SIDirect 2.0 communication to S7 400 on Ethernet

It seems similar issue that you describe and points to a bug in older versions of the driver
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0 Richard Köhlerstrand 8 months ago in reply to Jakob Agustsson

I also found this post on the support page

DasSIDirect topic goes stale and does not update tags

and this:

Some items not refreshing with SIDirect 2.0 communication to S7 400 on Ethernet

It seems similar issue that you describe and points to a bug in older versions of the driver
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