honeywell controller UDC 2500

[SAL2005]

Hi,

I am trying to read the data in labview from honeywell controller UDC 2500 via serial port RS 232. Has anyone been able to do it successfully? I am not sure what I need to do on the labview to talk to the controller? 

Can someone through some light on it?

Quick response is appreciated.

Thanks

SAL

[bjlv]

Hi SAL:
I have a library that I can dig up from many years ago using the Honeywell UDC 3000, if that might help. I don't know how similar the 3000 is to the 2500, but I can also tell you that the library was developed by reading the UDC 3000 manual for serial communications.  If you have that manual, you should be able to get this going.
Bart

[SAL2005]

Hi,

It seems that working of UDC 3000 and 2500 are pretty close. I was going through the manual and there is one thing that i didnt understand is how to acquire the paticular data from controller to the labview. They talk about the address and I am not very much familiar with addressing through serial port. If  you could help me how to do it on the labview I would really appreciate.

Thanks again and looking to hear from you.

Regards,

SAL

[bjlv]

Hi SAL:
The UDC series that I used was capable of RS-485 communication, which allows for several devices on the same daisy chained serial cable.  That means you need to use an address to talk to one specific device and not one of the others on the same port.  The address can be set on the UDC (not that I remember the details now), and what ever it is, that address needs to be part of the string sent so that the UDC unit knows the message is for it.  Hope this helps.  (I have dug out the archived CD that has my old code on it, but I didn't try to read it yet.)
Bart

[SAL2005]

Hi Bart,

I would really appreciate if you could send me the code in labview to talk to the controller.

Thanks,

SAL

[bjlv]

Hi SAL:
I will pull the stuff off the CD this weekend and get it to you.  It will be in LabVIEW 5 I think, but that should be automatically upgraded for you by your version of LabVIEW.
Bart

[SAL2005]

Hi Bart,

thanks. I really appreciate.

Regards,

SAL

[bjlv]

Hi SAL:
Here is what I have from many years (and versions of LabVIEW) ago.  The "example" will have a missing file if you look at it, but that file had to do with switching a DIO board to select the object to be connected for test in the chamber controlled by the UDC controller, so it doesn't really affect the UDC code.  Hope this helps.
Bart

[SAL2005]

Hi BART,

Thanks. Yyour code is very helpful. There is one thing I would like to ask you is about the addressing in your code. You have used UDC 3000 and I am using UDC 2500 and there seems to be a difference in the addressing from controller to controller. Could you tell me about the address you have used so I can compare that to my controller.

YOu have used -------->           11, 4204, E4, 18, 120,7D       on your PV request string...

What does this numbers corresponds to? address..register....

If I know what are these it would be easier for me to get similar addressing fom my controller.  I am really confused about this addressing.

Again thanks for your help.

Regards,

SAL.

[bjlv]

Hi SAL:
I am going to have to look into the manual I have for the UDC 3000 and actually look at my code, as I don't really remember any details anymore.  I think you can trace how I used a front panel control called address in the code I sent you.  If there are other numbers that don't seem to have any source, they must be defined in the software manual for the UDC controller.  Some of those things are going to be the command to get the PV.  There might be others for other things, but I don't remember that stuff after 7 or 8 years.  I will see if I can look it up tomorrow.
Bart