Argantix KDC 80-62 Manuel d'utilisateur télécharger pdf (Page 11)

Programming Manual

2.2 RS232C Interface

A suitable cable to connect the power supply to a 9 pin PC-AT style serial port is supplied with

the power supply.

The KDC Series expects a LF (Hex 10) terminator at the end of each string sent over the

RS232C interface. If the programming environment you use to develop test programs does not

append a LF terminator to each output string, the KDC Series will not respond. This may be the

case for programs like LabView™ using VISA drivers.

2.2.1 Serial Communication Test Program

The following sample program written in Quick-BASIC can be used to check communication to

the KDC Series Power supply over the RS232C serial interface. The interface is optional and

must be installed for this to work.

'Argantix RS232C Communication Demo Program

'This program is for demonstration purposes only and is not to be

'used for any commercial application

'================================================================

'Function and Subroutine Declarations

DECLARE FUNCTION retstring$ ()

'================================================================

'MAIN PROGRAM CODE

'================================================================

'OPEN COM2. Replace with COM1, COM3 or COM4 for Com port used

'The input and output buffers are set to 2K each although

'this is not required for most operations.

OPEN "COM2:19200,n,8,1,BIN,LF,TB2048,RB2048" FOR RANDOM AS #1 LEN = 1

CLS

PRINT "**** INTERACTIVE MODE ****"

'Enter and endless loop to accept user entered commands

INPUT "Enter Command ('quit' to exit)--> ", cmd$

IF cmd$ <> "QUIT" AND cmd$ <> "quit" THEN

IF cmd$ <> "" THEN

PRINT #1, cmd$ + CHR$(10);

END IF

IF INSTR(cmd$, "?") THEN

PRINT "Power supply query response = "; retstring$

END IF

'Check for Errors after each command is issued

PRINT "Sending non-query syntax check *ESR?"

'On fast PC's we may have to hold off between commands

FOR t = 0 TO 1000: NEXT t

PRINT #1, "*ESR?" + CHR$(10);

esr% = 0 'Clear last error

'Mask off bits 5,4,3,2 only. Other bits are not used.

esr% = VAL(retstring$) AND 60

'Process esr% value for error bits

IF esr% AND 4 THEN

PRINT "*** Query Error Reported by power supply ***"

END IF

IF esr% AND 8 THEN

PRINT "*** Instrument Dependent Error Reported by power supply ***"

END IF

IF esr% AND 16 THEN

PRINT "*** Command Execution Error Reported by power supply ***"

END IF

IF esr% AND 32 THEN

PRINT "*** Command Syntax Error Reported by power supply ***"

END IF

'Clear ERR. -XXX Message from front panel if any error occurred

10 KDC Series DC Power Supplies

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 119 120

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Argantix KDC 80-62 Manuel d'utilisateur Page 11

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