Clearing The Vxi Bus Error And Iackn Counters; Generating An Interrupt When An Alarm Condition Is Detected - Racal Instruments 1261B User Manual

Clearing The VXI
Bus Error and
IACKn Counters
Generating an
Interrupt When an
Alarm Condition is
Detected
Using The Enhanced Monitoring System 4-12
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SENSE:VXI:IACK2:COUNT?
SENSE:VXI:IACK3:COUNT?
SENSE:VXI:IACK4:COUNT?
SENSE:VXI:IACK5:COUNT?
SENSE:VXI:IACK6:COUNT?
SENSE:VXI:IACK7:COUNT?
The present count
Acknowledge cycles (IACKn) may be cleared to zero. This is
necessary since the count increases to a maximum value of 256.
Once the count reaches 256, the only way to clear it is to use the
command described below (or to select some other IACKn or
BERR line for monitoring).
The following commands may be used to clear the BERR or
IACKn counters:
SENSE:VXI:BERR:CLEAR
SENSE:VXI:IACK1:CLEAR -- clear IACK1 counter
SENSE:VXI:IACK2:CLEAR -- clear IACK2 counter
SENSE:VXI:IACK3:CLEAR -- clear IACK3 counter
SENSE:VXI:IACK4:CLEAR -- clear IACK4 counter
SENSE:VXI:IACK5:CLEAR -- clear IACK5 counter
SENSE:VXI:IACK6:CLEAR -- clear IACK6 counter
SENSE:VXI:IACK7:CLEAR -- clear IACK7 counter
This command is meaningful only if the specified event is
presently being monitored. If, for example, the IACK3 line is
presently being
"SENSE:VXI:IACK3:LIMIT" command was executed), then
clearing the counter for the BERR event will have no effect.
The previous paragraphs have described how to program
tolerance limits. When one of the attributes monitored by the
EMS exceeds its tolerance limits, an alarm condition exists. The
following paragraphs describe how to program the EMS to
generate an interrupt when it detects an alarm condition.
The EMS uses the SCPI-defined mechanism for generating
interrupts based on out-of-tolerance conditions.
implements a 3-level hierarchy of status registers to provide for
enabling and disabling of interrupts based upon the individual
VXI attributes monitored.
At the highest level, a separate condition, event, and enable
register is maintained for each of the following attributes:
1261B User Manual
-- read IACK2 count
-- read IACK3 count
-- read IACK4 count
-- read IACK5 count
-- read IACK6 count
-- read IACK7 count
of Bus Error (BERR) or Interrupt
-- clear BERR counter
monitored (because
Racal Instruments Ó 1995
a
The EMS