1261B User Manual
Racal Instruments
Ó
1995
Using The Enhanced Monitoring System 4-17
information, while the “Condition Register” holds the
present
status information. For example, if the -12V power supply
voltage goes out of tolerance and then returns in tolerance, bit 6
of the “Voltage Condition Register” will be 0 while bit 6 of the
“Voltage Event Register” will be 1.
The following queries may be used to read the various attributes’
Event Registers:
STAT:QUES:VOLT:EVENT?
-- Voltage Event Register
STAT:QUES:CURR:EVENT?
-- Current Event Register
STAT:QUES:TEMP:EVENT?
-- Temperature Event Reg.
STAT:QUES:FREQ:EVENT?
-- Fan Speed Event Reg.
STAT:QUES:TIME:EVENT?
-- Elapsed Time Event Reg.
STAT:QUES:VXI:EVENT?
-- VXI Event Register
Each time the “Event Register” is read, the bits of the “Event
Register” are cleared. The bits of the “Event Register” are only
set on a transition from an in-tolerance state to out-of-tolerance
state. This corresponds to a 0-to-1 transition of the “Condition
Register”.
The “Enable Register” determines which of the “Event Register”
bits will be passed onto the next level of status reporting. The
value of the “Event Register” and “Enable Register” are logically
ANDed together. If any of the bits of both registers are set, the
status summary bit passed onto the next level of status reporting
is also set. This is shown in
Figure 4-2.
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