Keithley 2601 Reference Manual page 343

Series 2600 System SourceMeter® Instruments Reference Manual
status.measurement.instrument.smuX.*
status.measurement.instrument.smuX.condition
status.measurement.instrument.smuX.enable
status.measurement.instrument.smuX.event
status.measurement.instrument.smuX.ntr
status.measurement.instrument.smuX.ptr
* = condition, enable, event, ntr or ptr
Attribute Measurement SMU event status register set.
Reads condition, enable, event, NTR and PTR registers:
Usage
measreg = status.measurement.instrument.smuX.condition
measreg = status.measurement.instrument.smuX.enable
measreg = status.measurement.instrument.smuX.event
measreg = status.measurement.instrument.smuX.ntr
measreg = status.measurement.instrument.smuX.ptr
Writes to enable, NTR and PTR registers:
status.measurement.instrument.smuX.enable = measreg
status.measurement.instrument.smuX.ntr = measreg
status.measurement.instrument.smuX.ptr = measreg
Set measreg to one of the following values:
0
status.measurement.VOLTAGE_LIMIT
status.measurement.VLMT
status.measurement.CURRENT_LIMIT
status.measurement.ILMT
status.measurement.READING_OVERFLOW
status.measurement.ROF
status.measurement.BUFFER_AVAILABLE
status.measurement.BAV
measreg
To set bit B0 (VLMT), set
To set bit B1 (ILMT), set
To set bit B8 (BAV), set
To set more than one bit of the register, set measreg to the sum of their decimal weights.
For example, to set bits B0 and B8, set measreg to 257 (1 + 256).
Remarks • This attribute is used to read or write to the measurement SMU event registers.
• Reading a status register returns a value. The binary equivalent of the returned value
indicates which register bits are set. The least significant bit of the binary number is bit 0,
and the most significant bit is bit 15.
• For example, assume value 257 is returned for the enable register. The binary equivalent
is 0000000100000001. This value indicates that bit B0 (VLMT) and bit B8 (BAV) are set.
• The used bits of the measurement SMU event registers are described as follows:
• Bit B0, VLMT – Set bit indicates that the voltage limit was exceeded. This bit will be
updated only when a measurement is taken or
invoked.
• Bit B1, ILMT – Set bit indicates that the current limit was exceeded. This bit will be
updated only when a measurement is taken or
invoked.
• Bit B7, ROF
Bit B8, BAV
•
both of the non-volatile reading buffers.
Details See "Measurement Event
Example Sets the BAV bit of the measurement SMU A enable register:
status.measurement.instrument.smuX.enable = status.measurement.BAV
2600S-901-01 Rev. C / January 2008
can also be set to the decimal weight of the bit to be set. Examples:
measreg
to 2 (2
measreg
to 256 (2
measreg
– Set bit indicates that an overflow reading has been detected.
Set bit indicates that there is at least one reading stored in either or
–
Registers" in
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Clears all bits.
Sets VLMT bit (B0).
Sets VLMT bit (B0).
Sets ILMT bit (B1).
Sets ILMT bit (B1).
Sets ROF (B7).
Sets ROF (B7).
Sets BAV (B8).
Sets BAV (B8).
0
to 1 (2 ).
1
).
8
).
smuX.source.compliance
smuX.source.compliance
Appendix D.
Section 12: Instrument Control Library
smuX = smua or smub
is
is
12-83