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Section Topics
2308-900-01 Rev. A / July 2008
Section 7: Status Structure
Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Questionable event status
The used bit of the questionable event register (shown in
Figure 7-6
) is described as follows:
•
Bit B8, calibration summary (Cal)
- Set bit indicates that an invalid calibration constant
was detected during the power-up sequence. This error will clear after successful calibration
of the power supply.
Figure 7-6
Questionable event status
Condition registers
As
Figure 7-1
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, when a current pulse is not
detected on the battery channel, bit B4 (PTT1) of the measurement condition register will be set
(1). When the pulse is detected, the bit clears (0).
The commands to read the condition registers are listed in
Table 7-4
. For details on reading
registers, see
Reading registers
.
Event registers
As
Figure 7-1
shows, each status register set has an event register. When an event occurs, the
appropriate event register bit sets to 1. The bit remains latched to 1 until the register is reset.
Reading an event register clears the bits of that register. *CLS resets all four event registers.
Table 7-4
Common and SCPI commands - condition registers
Command
Description
STATus
:OPERation:CONDition?
:MEASurement:CONDition?
:QUEStionable:CONDition?
STATus subsystem:
Read operation condition register.
Read measurement condition register.
Read questionable condition register.
OR
Qusetionable Event
Enable Register
Cal = Calibration Summary
& = Logical AND
OR = Logical OR
&
Decimal
Weights
[:EVENt]?
256
(2
8
)
:CONDition?
Cal
(B8)
(B7-B0)
(B15-B9)
Questionable Condition
Register
Questionable Event
Register
:ENABLe <NRf>
:ENABLe?
To QSB Bit
of Status Byte
Register
Cal
(B8)
(B7-B0)
(B15-B9)
Cal
(B8)
(B7-B0)
(B15-B9)
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