Agilent Technologies 6633B, 6634B Programming the Status Registers, Power-OnConditions, Rqs ,**$

3 - Programming the DC Source

Programming the Status Registers

You can use status register programming to determine the operating condition of the dc source at any time. For example, you may program the dc source to generate an interrupt (assert SRQ) when an event such as a current limit occurs. When the interrupt occurs, your program can then act on the event in the appropriate fashion.

Figure 3-7 shows the status register structure of the dc source. Table 3-1 defines the status bits. The Standard Event, Status Byte, and Service Request Enable registers and the Output Queue perform standard GPIB functions as defined in the IEEE 488.2 Standard Digital Interface for Programmable Instrumentation. The Operation Status and Questionable Status registers implement functions that are specific to the dc source.

Power-On Conditions

Refer to the *RST command description in chapter 4 for the power-on conditions of the status registers.

QUESTIONABLE STATUS

		CONDITION		PTR/NTR	EVENT
OV	0		1	1	1
	1
OCP			2	2	2
	2
FS			4	4	4
	3
N.U.
	4
OT			16	16	16
	5-8
N.U.
	9
RI			512	512	512
	10
Unreg			1024	1024	1024
	11-13
N.U.
	14
MeasOvld			16384	16384	16384
	15
N.U.
		STANDARD EVENT STATUS

ENABLE

1
2
4
16	OR
	LOGICAL
512
1024
16384

OUTPUT QUEUE

OFF

OUTPut:DFI:SOURce	FLT
	SERVICE
	REQUEST
STATUS BYTE	ENABLE
N.U. 0-2

0

OPC

1

N.U.

2

QYE

3

DDE

4

EXE

5

CME

6

N.U.

7

PON

EVENT

1

4

8

16

32

128

ENABLE

1

4

8

16

32

128

LOGICAL OR

DATA	QUEUE
	NOT
DATA
	EMPTY
DATA

QUES	3	8
	8
MAV	4		OR
	16	16
			LOGICAL
ESB	5
	32	32
MSS	6
	64
OPER	7	128
	128

			OPERATION STATUS
	CONDITION		PTR/NTR	EVENT
CAL	0
		1	1	1
	1-4
N.U.
	5
WTG		32	32	32
	6,7
N.U.
	8
CV		256	256	256
	9
N.U.		512	512	512
	10
CC+		1024	1024	1024
	11
CC-		2048	2048	2048
	12-15
N.U.

ENABLE

1

32
	OR
512	LOGICAL
256
1024
2048

RQS),*￿￿￿￿*$/

SERVICE

REQUEST

GENERATION

Figure 3-7. DC Source Status Model

32