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Checking for Errors
66
Using the HP E1326B/E1411B Multimeter
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The following program is a method of checking for errors as you program the
multimeter. The program monitors the multimeter's Standard Event Status
Register for an error condition. If no errors occur, the multimeter functions as
programmed. If errors do occur, the multimeter interrupts the computer and the
error codes and messages are read from the multimeter error queue.
The computer commands shown are for an HP 9000 Series 200/300
computer running HP BASIC and controlling the multimeter over HP-IB.
10
! Call computer subprogram "Errmsg" if a multimeter programming error
20
! occurs. Enable the computer to respond to an interrupt from the multimeter.
30
ON INTR 7 CALL Errmsg
40
ENABLE INTR 7;2
50
! Unmask the Event Status bit in the multimeter's Status Byte register.
60
! Unmask the multimeter error conditions in its Standard Event Status
70
! register.
80
OUTPUT 70903;"*SRE 32"
90
OUTPUT 70903;"*ESE 60"
100
! At this point, the multimeter is programmed for the intended application.
110
OUTPUT 70903;"...
120
OUTPUT 70903;"...
130
! Allow the computer time to respond if an error occurs during the
140
! multimeter configuration or measurement. Process the measurement
150
! data if no error occurs.
160
WAIT 2
170
ENTER 70903;...
180
PRINT ...
190
END
200
! When an error occurs, clear the multimeter to regain control. Execute a
210
! Serial Poll to clear the service request bit in the Status Byte register.
220
! Read all error messages in the multimeter error queue. Clear all bits in
230
! the multimeter Standard Event Status Register.
240
SUB Errmsg
250
DIM Message$[256]
260
CLEAR 70903
270
B=SPOLL(70903)
280
REPEAT
290
OUTPUT 70903;"SYST:ERR?"
300
ENTER 70903;Code,Message$
310
PRINT Code,Message$
320
UNTIL Code=0
330
OUTPUT 70903;"*CLS"
340
STOP
350
SUBEND
Chapter 3
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