Fluke PM3370B user manual Example Program Frame, Program frame

THE CPL PROTOCOL 6 - 3

6.2 EXAMPLE PROGRAM FRAME

In the COMMAND REFERENCE SECTION a very short programming example is given for each command. All examples are written in GW-Basic and able to run on an IBM-compatible PC. The example program expects the oscilloscope to be connected via COM1 port (RS-232) with a RS-232 null modem cable and to be setup at 9600 baud, 8 databits, no parity, 3 wire, xon/xoff = off (Menu UTILITY).

The following program lines are an example frame work. The frame work lets you embed any of the example programs shown in the COMMAND REFERENCE SECTION.

Program frame:

10 OPEN "COM1:9600,N,8,1, CS0, DS0, CD0" AS #1:’open serial port *)

... Insert Example Programs Here

999	END
1000	’- synchronize on acknowledge &		handle error:
1010	INPUT#1,ACK
1020	IF (ACK=0) THEN GOTO 1110
1030	IF (ACK<0) OR (ACK>4) THEN GOTO		1100
1040	PRINT "ERROR: ";ACK;
1050	ON ACK GOTO 1060,1070,1080,1090
1060	PRINT "SYNTAX ERROR"	: END
1070	PRINT "EXECUTION ERROR"	: END
1080	PRINT "SYNCHRONISATION ERROR" : END
1090	PRINT "COMMUNICATION ERROR"	: END
1100	PRINT "UNKNOWN ACKNOWLEDGE"	: END
1110	RETURN

First the serial port of the PC is opened (line 10) with the settings of the oscilloscope communication parameters **)

Following that, the example program lines from the COMMAND REFERENCE SECTION can be executed.

The subroutine to synchronize on the <acknowledge> returned from the oscilloscope starts at line 1000.

*) The oscilloscope communication parameters are stored in battery backup memory when the oscilloscope is turned off. On power-up the parameters are restored.