Racal Instruments 1261B User Manual page 93

Using The Enhanced Monitoring System 4-24
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STAT:QUES:TEMP:ENABLE 128
-- Enable Fan #2 Speed
STAT:QUES:FREQ:ENABLE 4
-- Enable all bits of the Questionable Enable Register
STAT:QUES:ENABLE 32767
-- Enable bit 3 of the IEEE-488.2 Status Byte
*SRE 8
When an interrupt is detected by the system controller, it must
check to see which condition generated the condition. To do
this, it must:
1) Read the Questionable Event Register to see which
attribute caused the interrupt. Recall that this register is
read with the "STAT:QUES:EVENT?" query.
2) If the Voltage Summary bit (bit 0) is set, then read the
Questionable Voltage Event Register to determine which
supply Is out of tolerance.
Event Register may be read with the
"STAT:QUES:VOLT:EVENT?" query.
3) If the Current Summary bit (bit 1) is set, read the
Questionable Current Event Register to determine which
supply is out of tolerance.
Event Register
"STAT:QUES:CURR:EVENT?" register.
4) If the Temperature Summary bit (bit 4) is set, it must be
caused by VXI slot 7 temperature rise, since that is the
only slot enabled in this example.
5) If the Frequency Summary bit (bit 5) is set, it must be
caused by fan #2 since that is the only fan enabled in this
example.
The example enables only a few attributes to generate an
interrupt. For most users, all out-of-tolerance conditions should
be investigated. Therefore, for most users, all of the Enable
Registers should be set to a value of 32767 so all monitored
attributes are capable of generating an interrupt.
1261B User Manual
The Questionable Voltage
The Questionable Current
may be read
Racal Instruments Ó 1995
with the