User Manual

Series 2200 Programmable DC Power Supplies Reference Manual Appendix C: Status model
2200S-901-01 Rev. A/November 2011 C-5
Operation condition register (OCR)
The operation condition register is made up of eight bits, which note the occurrence of events as
shown here.
Figure 28: Operation Condition Register (OCR)
OCR bit functions
Bit
Function
7 (MSB)
————
This bit is not used.
6
————
This bit is not used.
5
RUN
Running List. Indicates that the power supply is executing a lis
4
TBF
Trace Buffer Full. This bit is used internally, by the instrument.
3
CC
Constant Current. Indicates that the power supply is in constant current mode
and is regulating its output current.
2
CV
Constant Voltage. Indicates that the power supply is in constant voltage mode
and is regulating its output voltage.
1
WTG
Waiting for Trigger. Indicates that the power supply is waiting for a trigger
0 (LSB)
CAL
Calibrating. Indicates that the power supply is calculating a new calibration
parameter.
Operation event register (OEVR)
The operation event register has the same content as the operation condition register. See Operation
condition register (OCR) (on page C-5) for information on the operation event register.
Questionable condition register (QCR)
The questionable condition register is made up of eight bits which note the occurrence of five types of
events as shown in the following figure.
Figure 29: Questionable condition register (QCR)