Chapter 6 NI-VXI Configuration Utility
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National Instruments Corporation 6-25 VXI/VME-PCI802 2 for Sola ris
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Figure 6-9. Advanced VXI Settings
VXI/VME Auto Retry
The VXI/VME-MXI-2 has an automatic retry feature for cycles that
map from the VXI/VMEbus to the MXIbus. By default this option is
disabled.
Normally, when a cycle maps from the VXI/VMEbus to the MXIbus,
any retry response received on the MXIbus is passed to the
VXI/VMEbus. If you enable the Auto Retry feature, the
VXI/VME-MXI-2 automatically retries any MXI cycle that receives
a retry response instead of passing a retry response back to the
VXI/VMEbus. The VXI/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 VXI/VMEbus.
Notice that the VXI/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 VXI/VME-MXI-2 receives another retry, it will pass
a retry back to the VXI/VMEbus even though Auto Retry is enabled.