priority based managment of a gpib-enet

[dordor]

I look for a Vi able to control severals pc's connected to a gpib device via a gpib-enet

[AaronK]

Hi,

I am not sure that I understand what you are looking for. You want to use PC-PC gpib communication to control a series of computers? GPIB is probably not the best technology to get this done. You might consider writing your own tcp/ip server to handle this and use ActiveX to launch and control the computer.
Hope this helps out!

Best Regards,
Aaron K.
Application Engineer
National Instruments

[dordor]

Hi,
in other words, I want to share a gpib device between several pc's using gpib-enet. A complementary pc being incharge of managing a queue.
Using such a configuration, students are supposed to develop and test some vi's to remotely control and share a basic experiment.
Thank you for your help
Patrice

[AaronK]

Hi,

The ENET/100 will allow multiple concurrent connections, but if the students run command that changes the state of the device, this could be a problem. Actually even with a computer multiplexing, state will be very difficult to maintain. If the instrument is stateless, an iblck commad may handle this problem, but will lock all other students out of the device. For info on iblck, check your user manual.

Hope this helps!
Aaron K.
Application Engineer
national Instruments

[dordor]

Unfortunately, I am using a standard GPIB-enet ( not gpib-enet 100). However I cannot get precise informations on :
-the possibility to up grade our device,
- the real differences between both versions

I stil l plane to use a server and a queue. Once an student wil be allowded to connect he will lock the device for a few seconss( or minute) restricted by the time out setting.
If you have more informations I surely appreciate to get them.

Sincerely

[AaronK]

Hi,

Here are some of the differences between the two:
The Enet:
-10BaseT speed only
-Dip switches to configure
-Twisted pair and coax versions
-Used old RARP (Reverse Address Resolution Protocol)
-Obsolete

The Enet/100:
-10BaseT and 100BaseT
-Reset switch but no dip switches
-Only twisted pair version
-Uses DHCP

Basically the ENET/100 is faster and more elegant. As for the upgrades, I would contact your sales representative. They should be able to tell you more about our upgrade offers.

Hope this helps out!

Best Regards,
Aaron K.
Application Engineer
National Instruments