ppendix E: Status model Model 2657A High Power System SourceMeter® Instrument Reference Manual
E-24 2657A-901-01 Rev. B/December 2012
Measurement Event Registers
As shown in the status model's Measurement event registers (on page E-8), there are eight register
sets associated with measurement event status. Commands are summarized in the Status register
set contents (on page E-1) topic. Note that bits can also be set by using numeric parameter values.
For details, see Programming enable and transition registers
(on page E-14) .
For example, either of the following commands will set the VOLTAGE_LIMIT enable bit:
status.measurement.enable = status.measurement.VOLTAGE_LIMIT
status.measurement.enable = 1
When reading a register, a numeric value is returned. The binary equivalent of this value indicates
which bits in the register are set. For details, see Reading registers
(on page E-15). For example, the
following command will read the Measurement Event Enable Register:
print(status.measurement.enable)
This register set feeds to bit B0 (MSB) of the Status Byte. The bits used in the Measurement Event
Registers are described as follows:
• Bit B0, Voltage Limit (VLMT): Set bit indicates that the voltage limit was exceeded. This bit will
be updated only when either a measurement is taken or the smuX.source.compliance
attribute is read.
• Bit B1, Current Limit (ILMT): Set bit indicates that the current limit was exceeded. This bit will
be updated only when either a measurement is taken or the smuX.source.compliance
attribute is read.
• Bit B2, Sink Limit (SLMT): Set bit indicates that the sink limit was exceeded. This bit will be
updated only when either a measurement is taken or the smuX.source.compliance attribute
is read.
• Bit B3, Overvoltage (OV): Set bit indicates that an overvoltage condition has occurred. This bit
will be updated only when either a measurement is taken or the smuX.source.compliance
attribute is read.
• Bit B7, Reading Overflow (ROF): Set bit indicates that an overflow reading has been detected.
• Bit B8, Buffer Available (BAV): Set bit indicates that there is at least one reading stored in
either or both of the nonvolatile reading buffers.
• Bit B11, Interlock (INT): Set bit indicates that interlock was asserted.
• Bit B13, Instrument Summary (INST): Set bit indicates that a bit in the Measurement Instrument
Summary Register is set.
Commands to program and read the register are summarized in the Status function summary
(on
page E-4) table. For more information about the Measurement Event Registers, refer to Status
register set contents (on page E-1) and the figures in this appendix.
To Next Page
Loading...
Need help?
General
