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S7PROSim v5.4 and VB 2008, Problem with events

5/13/2010 11:30 PM	Rate (0)
FrankPeeters Member Joined: 5/13/2010 Last visit: 11/11/2020 Posts: 1 Rating: (0)	Hi, We are making a short program in Visual Basic 2008 to communicate with PLCSIM via the Prosim COM object. As for the methods we use, everyone of them works well, but when we try to implement the events, we can't get not one of them to work, even not the ConnectionError event. We tried to program the event as described in the manual "S7ProSim V5.4". we tried different ways, but we never succeeded in getting a result from the event whatever we tried. Can anyone please help us with a suggestion what might be wrong, how to program or where and what we should check ? Installed software: XP SP2, S75.4 , PLCSIM 5.4, visual studio 2008 Thanks in advance, I feel like a botcher

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8/2/2010 9:30 PM	Rate (0)
TylerO Posts: 1 Rating: (0)	Hello, I suppose you've moved on the past 3 months, but here's my response anyway... I see the same behavior as you did. I tried both Visual Basic Express 2010 (freeware) and Visual Basic 6. The former complained of "event invocation for COM objects requires event to be attributed with DispIdAttribute" at compile-time. I tried late-binding with AddHandler but the result is the same: my event handlers never get called. I'd really like to see if any ConnectionError's are thrown because I see lots of flaky behavior after connecting like... PLCSIM must be restarted before my COM app can connect again. Seethis threadwherein an older pre-service-pack version of PLCSIM is recommended. GetState() returns the string "ERROR". On the other hand, I do see signs that things are working: the simulator enters "single" (as opposed to "continuous") scan mode when I connect. Also, I can occasionally read DB values withReadDataBlockValue(). Another forum user recommended the manual for S7ProSim 5.3SP1. It contains a complete VB example but I didn't find a solution there. -Tyler
TylerO Posts: 1 Rating: (0)
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