3 Remote Interface Reference
134 E364xA User’s and Service Guide
Questionable status register
The Questionable Status register provides information about unexpected
operations 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 3-3 Bit Definitions - Questionable Status Register
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 loses regulation, then bit 1 is 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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