Keithley 2790, Reference Manual

Page: 323 / 568

11-18 Model 2790 SourceMeter
®
Switch System Reference Manual
Figure 11-7
Questionable event register
Condition registers
As Figure 11-1 shows, each status register set (except the Standard Event Register set) has
a condition register. A condition register is a real-time, read-only register that constantly
updates to reflect the present operating conditions of the instrument. For example, while
the Model 2790 is in the idle state, bit B10 (Idle) of the Operation Condition Register will
be set. When the instrument is taken out of idle, bit B10 clears.
The commands to read the condition registers are listed in Table 11-3 . For details on read-
ing registers, see “Reading registers,” page 11-6 .
Table 11-3
Condition register commands
Command Description
STATus:OPERation:CONDition? Read Operation Condition Register.
STATus:MEASurement:CONDition? Read Measurement Condition Register.
STATus:QUEStionable:CONDition? Read Questionable Condition Register.
(B14) (B15)
OR
Questionable
Condition
Register
Questionable
Event Enable
Register
Warn = Command Warning
Cal = Calibration Summary
Temp = Temperature Summary
& = Logical AND
OR = Logical OR
0
(B14) (B8) (B15)
0
Warn Cal
Questionable
Event
Register
(B14) (B15)
To
Questionable
Summary Bit of
Status (QSB)
Byte Register
(B3 - B0)
Warn
0
Warn
&
&
&
Int2 Int1
(B9) (B13 - B11) (B10)
Temp
(B4) (B7 - B5)
(B8)
Cal
(B3 - B0)
Int2 Int1
(B9) (B13 - B11) (B10)
Temp
(B4) (B7 - B5)
(B8)
Cal
(B3 - B0)
Int2 Int1
(B9) (B13 - B11) (B10)
Temp
(B4) (B7 - B5)
&
&
&
Int2 = Slot 2 Interlock Open
Int1 = Slot 1 Interlock Open