Connecting to Delta CompSystems RMC75E using RMCLink Instrument Driver

[stuee426]

I am having trouble connecting to a Delta CompSys RMC75E over Ethernet using Labview.  I have downloaded the LV instrument driver and installed it in the instr. folder, this is dcsRMCxxx version 1.2.  I also installed RMCLink from Delta's website, version 3.0a.  I did notice that the Labview 8.5 driver in this folder is version 1.0.  I get the following error when I try to connect using one of the example VI’s : 

Error 1555 occurred at Unknown System Error in

dcsRMCxxx Series.lvlib:dcsCOMM_RMCLink.lvclass:ReadFloats.vi

->dcsRMCxxx Series.lvlib:dcsRMCbase.lvclass:ReadFloats.vi

->dcsRMCxxx Series.lvlib:dcsRMC70.lvclass:GetPlotLayout.vi

->dcsRMCxxx Series.lvlib:dcsRMCbase.lvclass:ReadTrend.vi

->dcsRMCxxx Series.lvlib:dcsRMCbase.lvclass: PlotTrend.vi

->RMC75e Series Control and Trending.vi

Possible reason(s):

LabVIEW:  Property or invoke node is corrupt.

When I try to replace the invoke node in the ReadFloats.vi I get another error:

ActiveX TypeLib mismatch detected (1 warning)

C:\Program Files\National Instruments\Labview 2009\instr.lib\dcsRMCxxx Series\Private\dcsCOMM_RMCLink\ReadFloats.vi (dcsRMCxxx Series.lvlib:dcsCOMM_RMCLink.lvclass:ReadFloats.vi)

  -Expected TypeLib with CLSID {E430ED85-D7FA-4303-92BD-68B671F234AB} and Version 2.0, but expected Version 3.0.

I am using Labview 2009, student edition.  I have LV 8.2 full version but wanted to try out the latest drivers on 2009.  I also installed the LV modbus but get another error with that as well, Error 6003 occured at MODBUS Exception code 3.  I get these errors for our RMC on the local Ethernet connection and for Delta's online RMC’s.

Any help would be greatly appreciated.

[stuee426 · Accepted solution]

Fixed it by replacing the invoke nodes in the Initialize.vi and the constant in the class private data.  The ActiveX warning can be ignored. 

[Douglas_Smith]

Excuse me if this a silly question but I am getting close to the same error and am new to Labview. What did you replace the invoke nodes with? I can find the errors but do not know how to resovle the problem.

[KyleP]

It sounds like you may just need to replace the invoke nodes with a new instance of themselves.