Chapter 4 Remote Interface Reference
The SCPI Status Registers
105
4
The Questionable Status Register
The Questionable Status register provides information about unexpected operation of
the power supply. Bit 4 reports a fault with the fan, and bit 13 summarizes questionable
outputs for any of the two supplies. For example,
if one of the two supplies is in constant voltage mode and due to an overload looses
regulation, bit 13 is set (latched). To read the register, send the command
STATus:QUEStionable?.
To make use of bit 13 you must first enable registers you wish to summarize with bit
13. Send the command STAT:QUES :INST:ENAB 6 to enable the Questionable
Instrument register, then send the command STAT:QUES:INST:ISUM<n>:ENAB
515 for each supply to enable the Questionable Instrument Summary register, where
n is 1 or 2.
Table 4-3. Bit Definitions - Questionable Status Register
The Questionable Instrument Status Register
The Questionable Instrument register provides information about unexpected
operations for each of the two supplies. For example, if the output1 supply is in the
constant voltage mode and looses regulation, then bit 1 set indicating a possible
overload in the output1 supply. The output2 supply is reported as
bit 2. Send the command STAT QUES:INST? to read the register. The
STAT:QUES:INST:ISUM<n> registers must be enabled to make use of the
Questionable Instrument register. Send the command
STAT:QUES:INST:ISUM<n>:ENAB 515 to enable output n.
Bit Decimal
Value
Definition
0-3 Not Used 0 Always set to 0.
4 Overtemperature 16 The fan has a fault condition.
5-12 Not Used 0 Always set to 0.
13 ISUM
8192
Summary of QUES:INST and QUES:INST:ISUM
registers.
14-15 Not Used 0 Always set to 0.
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