National Instruments VXI/VME 600 - Manual (Page 34)

Appendix B Common Questions
© National Instruments Corporation B-3 VXI/VMEpc 600 Series for Windows 95/NT
This includes National Instruments VXI-DAQ cards, which means you can
configure these devices from T&M Explorer without having to run the
DAQ Configuration Utility.
What about running Resman?
Resman is the name of the utility that performs the duties of a VXI
Resource Manager as discussed in the VXIbus specification. When you
set a National Instruments controller to Logical Address 0, you will at some
point need to run Resman to configure your VXI instruments. If your
controller uses a different (non-zero) logical address and is a
message-based device, you need to start Resman before running it on the
Logical Address 0 computer.
So when do you need to run Resman?
Run Resman whenever you need to configure your VXI instruments. For
example, if you power-cycle your VXI/VME chassis, your instruments will
be reset, and you will need to run Resman to configure them. You can get
into trouble if you run Resman when your devices are not in a reset state.
Therefore, if you have to run Resman after running it once, you should reset
all of your VXI instruments.
Systems consisting of only a VMEpc 600 Series controller, a VME chassis,
and VME boards do not need to run Resman when using NI-VXI software
even though the devices do not appear in the T&M Explorer connection
tree. However, you would not be able to use VISA without manually adding
the VME devices to the system by using T&M Explorer as described above
and then running Resman. This is because NI-VISA uses the Resource
Manager to create instrument sessions for VXI/VME device
communication. If this is not an issue for you, you can skip Resman.
You can perform resource manager operations from within T&M Explorer.
Additionally, you can tell T&M Explorer to run Resman when the
computer first boots up. In this case you may never need to run Resman
explicitly again. You can configure the computer to run Resman at startup,
so when you power the chassis, Resman runs. If you power-cycle the
chassis, the PC reboots, forcing Resman to run again.
How do I handle VME devices?
Although there is no way to automatically detect VME devices in a system,
you can add them easily through the Add Device Wizard in T&M
Explorer. Through this procedure, you can reserve resources for each of
your VME devices and configure T&M Explorer to show VME devices
on the screen with all your other devices.