T H E Q U E S T I O N A B L E S T A T U S R E G I S T E - Agilent Technologies E3633A Operating Manual

Chapter 4 Remote Interface Reference
The SCPI Status Registers
The Questionable Status Register
T h e Q u e s t i o n a b l e S t a t u s r e g i s t e r p r o v i d e s i n f o r m a t i o n a b o u t v o l t a g e a n d
c u r r e n t r e g u l a t i o n . B i t 0 i s s e t w h e n t h e v o l t a g e b e c o m e s u n r e g u l a t e d , a n d b i t
1 i s s e t i f t h e c u r r e n t b e c o m e s u n r e g u l a t e d . F o r e x a m p l e i f t h e p o w e r s u p p l y
m o m e n t a r i l y g o e s t o c o n s t a n t c u r r e n t m o d e w h e n t h e p o w e r s u p p l y i s
o p e r a t i n g a s a v o l t a g e s o u r c e ( c o n s t a n t v o l t a g e m o d e ) , b i t 0 i s s e t t o i n d i c a t e
t h a t t h e v o l t a g e o u t p u t i s n o t r e g u l a t e d .
T h e Q u e s t i o n a b l e S t a t u s r e g i s t e r a l s o p r o v i d e s i n f o r m a t i o n t h a t t h e p o w e r
s u p p l y h a s a n o v e r t e m p e r a t u r e c o n d i t i o n a n d t h a t t h e o v e r v o l t a g e a n d
o v e r c u r r e n t p r o t e c t i o n c i r c u i t s h a v e t r i p p e d . B i t 4 r e p o r t s a n o v e r t e m p e r a t u r e
c o n d i t i o n o f t h e f a n , b i t 9 r e p o r t s t h a t t h e o v e r v o l t a g e p r o t e c t i o n c i r c u i t h a s
t r i p p e d , a n d b i t 1 0 r e p o r t s t h a t t h e o v e r c u r r e n t p r o t e c t i o n c i r c u i t h a s t r i p p e d .
T o r e a d t h e r e g i s t e r , s e n d
Table 4-3. Bit Definitions - Questionable Status Register
Bit Decimal
Value
0 Voltage 1
1 Current 2
2-3 Not Used 0
4 Overtemperature 16
5-8 Not Used 0
9 Over Voltage 512
10 Over Current 1024
11-15 Not Used 0
The Questionable Status Event register is cleared when:
*CLS
• Y o u e x e c u t e t h e
• Y o u q u e r y t h e e v e n t r e g i s t e r u s i n g
E v e n t r e g i s t e r ) c o m m a n d .
F o r e x a m p l e , 1 6 i s r e t u r n e d w h e n y o u h a v e q u e r i e d t h e s t a t u s o f t h e
q u e s t i o n a b l e e v e n t r e g i s t e r , t h e t e m p e r a t u r e c o n d i t i o n i s q u e s t i o n a b l e .
The Questionable Status Enable register is cleared when:
STAT:QUES:ENAB 0
• Y o u e x e c u t e
92
STATus:QUEStionable?
Definition
The power supply is/was in the constant current mode.
The power supply is/was in the constant voltage mode.
Always set to 0.
The fan has a fault condition.
Always set to 0.
The overvoltage protection circuit has tripped.
The overcurrent protection circuit has tripped.
Always set to 0.
( c l e a r s t a t u s ) c o m m a n d .
STAT:QUES?
c o m m a n d .
.
( S t a t u s Q u e s t i o n a b l e