User manual

Chapter 7 VXIplug&play for the VXI-MXI-2
VXI-MXI-2 User Manual 7-10 © National Instruments Corporation
Auto Retry
The VXI-MXI-2 has an automatic retry feature for cycles that map
from the VXIbus to the MXIbus. You can select Enabled or Disabled
for this control. By default this option is disabled.
Normally, when a cycle maps from the VXIbus to the MXIbus, any
retry response received on the MXIbus is passed to the VXIbus. If you
enable the Auto Retry feature, the VXI-MXI-2 automatically retries
any MXI cycle that receives a retry response instead of passing a retry
response back to the VXIbus. The VXI-MXI-2 automatically continues
to retry the MXI cycle until it receives either a DTACK or BERR
response, which it then passes to the VXIbus.
Notice that the VXI-MXI-2 has a limit on the number of automatic
retries it will perform on any one cycle. If the limit is exceeded and the
VXI-MXI-2 receives another retry, it will pass a retry back to the
VXIbus even though Auto Retry is enabled.
MXI Bus Settings
Use the options in this group to control features of the MXIbus
interface on the VXI-MXI-2 module. Access these controls by setting
the View control to MXIbus as shown in Figure 7-3.
Figure 7-3. VXI-MXI-2 VXI plug&play Soft Front Panel MXIbus Settings