Activex serialRS232

[Dennis_Knutson]

Better. For some reason, I cannot read any of the help topics. I see them listed but nothing opens. On the other hand, section B.1 in the manual describes how you could communicate to the sensor without the dll. There is a description of how to use commands with the VISA/TCP interface in LabVIEW or a terminal emulation program such as Hyperterminal. Personally, I would use VISA to send/receive the commands.

So, did you also get some other software from the vendor? Some exe that allows you to read/write? If you have that and it works, it verifies you have the cable and com settings correct.

[DébutantLab2011]

I have a software but only for configuring the sensor.

My cable and settings are correct :

I use an USB-232 adaptator which is on my port COM3 and correctly detect

BAUd 115200, PARITY none, 8bits ect....

So for me my config it's correct. If I start the software i directly can communicate with the sensor.

Attached is my VI without any connection. now I want to add the "block" RS232 connection,because, maybe I missunderstand something but, If I want to receive data by RS232 I must use serial VISA "block", it's not automatic (with automation open)? I have tried to add VISA without any success.

You, how do you do that?

[Dennis_Knutson]

You have the option of using the ActiveX library or using VISA. I can't tell if your ActiveX Vi is correct because I cannot read the help file for it.

For using VISA, you could start with one of the simple examples such as Basic Serial Write and Read but I would advise you to start with a program such as Hyperterminal. You can also use MAX to test serial communication. A command in the LabVIEW example or in MAX could be ACQ ? ,ALL followed by \r\n for the carriage return\line feed.

[DébutantLab2011]

I will try to do it tomorrow.

If i not sucess I will try to do a pdf file of the help file.

Thank you so much for your help.

If I success I will write you too ;).

[DébutantLab2011]

I'm back with some news informations.

To remind you : I have a Polytec Sensor and I want to read data from the sensor.

I have the .DLL with activex objects.

In fact, the .dll contain COM (component object model). I can't use hyperterminal with my sensor because the data send by the sensor are not compatible with hyperterminal (this is an answer from Polytec).

I have .dll with COM objects. With the block "automation open" I can choose methods or object and build my .vi.

To read COM .dll with "automation open" I have done this :

1. Register DLL into Windows 
- Go to <local folder>\WINDOWS\system folder 
- Copy paste your dll file into this folder, TraceDataV28_test18.dll 
- Open Command Prompt (cmd), go to directory <local folder>\WINDOWS\system and type REGSVR32 "TraceDataV28_test18.dll"

- A pop up window should appear notifying you that the dll has been registered 

2. Use Invoke/Property Node: 
- Open LabVIEW 
- Drag and Drop Invoke Node at Functions Palette>>Application Control>>Invoke Node 
- Right Click on it, and Select Class>>ActiveX>>Browse...

Browse for your DLL file, and you can select which COM method you want to use.

Now I want to understand something. I receive my data by ethernet and I know the IP address of my sensor. When I start my .vi, it works but I have

no data (or wrong data).

My question is : how I can specify or build my .vi to say that my data incoming by ethernet?

With "automation open" is it possible?

Thank you for your help.

[Dennis_Knutson]

As I said, I am not able to read the help file. In general, you will need to select the right object and property. All that I see in the help file is properties - no methods. You'll have to do things in the correct order as well but unless someone can read the help file and understand it, you might be on your own, sorry.

[nyc_(is_out_of_here)]

According to the LsvComLib.chm file, you need to start with the Lsv controller.

Everything should flow from there.