SUPPORT OF MODBUS PROTOCOL

[rujuta]

hi,
we r working on a project with a instrument( scanner) having modbus protocol,along with labview7.1 and other input-output devices. now can u kindly guide us the best possible way for the communication with these instruments. we would like to know the the drivers required for the same.n also how to communicate with the instrument through rs 232?...
can u just give the most efficent manner for the above things.


awaiting for the positive support.

[thehobbs]

The Eurotherm 2000 Series Certified LabVIEW Driver contains low level VIs that send and receive commands using the MODBUS protocol. I recommend that you review these low-level VIs and try to adapt them to your needs. You will still need to know the different commands for your instrument(s).

Jason Hobbs
Instrument Drivers

[Olivier-JOURDAN]

You can find serial ModBus Driver [url=http://www.saphir.fr/GB/products/drivers/modbus/index.htm]here[\url]. There is an exe demo (implementing the driver) to test communication with your device...
The driver use is easy, just use high-level VIs implementing the different request of the protocol.

Hope, this can help you...

[metallifredd]

Hi.
I am also trying to figure out how to communicate via the serialport with a modbus device.
I tried downloading the driver from ni.com but all I can see in Labview Userlib was a number of vi:s with a questionmark as an icon? when I tried to place one of the vi:s on the blockdiagram it didn't appear.
does anybody know what to do?
Please.

[metallifredd]

ok guys. I placed the driver in the wrong directory.
now its working.
sorry...