User`s manual

Getting Started 17Chapter 1
Setting the Interrupt
Priority
The E1468A/E1469A Relay Matrix Switch modules generate an interrupt
after a channel has been closed. These interrupts are sent to, and
acknowledgments are received from, the command module (such as an
E1406) through the VXIbus backplane interrupt lines.
For most applications where the relay matrix switch module is installed 
in a C-Size VXI mainframe, the interrupt priority jumper does not have to be
moved. This is because the VXIbus interrupt lines have the same priority
and interrupt priority is established by installing the modules in slots
numerically closest to the E1406 Command Module. Thus, slot 1 has a
higher priority than slot 2, slot 2 has a higher priority than slot 3, etc..
See Figure 1-6 to change the interrupt priority. You can select eight different
interrupt priority levels. Level 1 is the lowest priority and level 7 is the highest
priority. Level X disables the interrupt.
The module's factory setting is level 1. To change the priority level, remove
the four-pin jumper from the old priority location and reinstall the jumper in
the new priority location. If the four-pin jumper is not used, the two jumper
locations must have the same interrupt priority level selected.
NOTE The interrupt priority jumper must be installed in position 1 when using the
E1406 Command Module. Level X interrupt priority should not be used
under normal operating conditions. Changing the interrupt priority level
jumper is not recommended.
Figure 1-5. Setting the Status Register Switch
13
10
E1469A
E1468A0
1
10
10
1
0
Example shows
switch set
to "E1468A"
Switch Location
Status Register