Fluke PM-3394B How to enable status reporting, Program example using the status byte STB

3 - 74 USING THE COMBISCOPE INSTRUMENTS

3.15.3How to enable status reporting

The principle of using the status reporting mechanism is explained by showing two program examples. In the first example the standard Status Byte (STB) is checked to signal "operation completed". In the second example the SRQ mechanism is used to signal "operation completed" by generating a Service Request.

3.15.3.1Program example using the status byte (STB)

PROGRAM EXAMPLE:

In this example the standard status byte (STB) is checked to detect whether or not a "CONFigure:AC" + "INITiate" operation is completed. If completed, the program continues by fetching and printing the AC-RMS value.

CALL	IBTMO(0, 13)		’Timeout at 10 seconds
CALL	Send(0, 8,	"*RST", 1)	’Resets the instrument
CALL Send(0, 8,		"*ESE 1", 1)	’Enables OPC-bit (0) in ESE
’"OPeration Completed" is reported in bit 5 (ESB) of the STB after sending *OPC.
’
CALL Send(0, 8,		"CONFigure:AC", 1)	’Automatic configuration
CALL Send(0, 8,		"*OPC", 1)
’This command forces the instrument to set the OPC bit
’when all pending operations have been finished.
’
CALL Send(0, 8,		"INITiate", 1)	’Single initiation
ESB.bit.set = 0
result$ = SPACE$(3)
WHILE ESB.bit.set = 0
CALL Send(0, 8, "*STB?", 1)			’Requests for the STB
CALL Receive(0, 8, result$, 256)			’Reads the STB
IF (VAL(result$) AND 32) THEN			’ESB = bit 5 (value 32)
	ESB.bit.set	= 1	’Operation completed
END IF
WEND
CALL Send(0, 8,		"FETCh:AC?", 1)	’Fetches AC-RMS value
result$ = SPACE$(30)
CALL Receive(0,		8, result$, 256)	’Reads AC-RMS value
PRINT "AC-RMS value = "; result$			’Prints AC-RMS value