Chapter 6
VXIplug&play for the VME-MXI-2
VME-MXI-2 User Manual
6-10
© National Instruments Corporation
Auto Retry
The VME-MXI-2 has an automatic retry feature for cycles that map
from the VMEbus 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 VMEbus to the MXIbus, any
retry response received on the MXIbus is passed to the VMEbus. If you
enable the Auto Retry feature, the VME-MXI-2 automatically retries
any MXI cycle that receives a retry response instead of passing a retry
response back to the VMEbus. The VME-MXI-2 automatically
continues to retry the MXI cycle until it receives either a DTACK or
BERR response, which it then passes to the VMEbus.
Notice that the VME-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
VME-MXI-2 receives another retry, it will pass a retry back to the
VMEbus even though Auto Retry is enabled.
MXI Bus Settings
Use the options in this group to control features of the MXIbus
interface on the VME-MXI-2 module. Access these controls by setting
the View control to MXIbus as shown in Figure 6-3.
Figure 6-3. VME-MXI-2 MXIbus Settings
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