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Selecting the Interrupt Priority
The multiplexer module generates a backplane interrupt after a channel
relay closing or opening completes. You can select seven different interrupt
priority levels for this interrupt. Level 1 is the lowest priority and Level 7 is
the highest priority. The multiplexer module’s factory setting is Level 1.
Refer to Figure 2-5 to change the interrupt priority. To change, clip and
remove two jumpers from the old priority location. Install and solder two
new jumpers in the new priority location (Figure 2-4 shows a priority
change from 1 to 7). Set the interrupt priority level to the interrupt handler
level of the module’s commander. The E1300/E1301 commander always
handles all interrupt levels. The E1405/E1406 and the E1499A
commander’s default is to handle interrupt level 1, however, they may be
configured to handle any combination of interrupt levels.
Figure 2-4. Removing the Isolation Jumper
Figure 2-5. Changing the Interrupt Priority Level Jumpers
Chapter 2
Configuring the HP E1346A Multiplexer Module 23
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