Introduction to Programming - 2

Baud Rate

The front panel Address key lets you select one of the following baud rates, which is stored in non-volatile

memory:

 

 

 

 

 

300

600

1200

2400

4800

9600

RS-232 Flow Control

The RS-232 interface supports several flow control options that are selected using the front panel Address key. For each case, the dc source will send a maximum of five characters after holdoff is asserted by the controller. The dc source is capable of receiving as many as fifteen additional characters after it asserts holdoff.

XON-XOFF

A software handshake that uses the ASCII control code DC3 (decimal code

 

19) to assert hold-off, and control code DC1 (decimal code 17) to release

 

hold-off.

RTS-CTS

The dc source asserts its Request to Send (RTS) line to signal hold-off

 

when its input buffer is almost full, and it interprets its Clear to Send (CTS)

 

line as a hold-off signal from the controller.

DTR-DSR

The dc source asserts its Data Terminal Ready (DTR) line to signal hold-off

 

when its input buffer is almost full, and it interprets its Data Set Ready

 

(DSR) line as a hold-off signal from the controller.

NONE

There is no flow control.

Flow control options are stored in non-volatile memory.

RS-232 Programming Example

The following program illustrates how to program the power supply using RS-232 to set the output voltage and current and to readback the model number and output voltage. The program was written to run on any controller using Microsoft QBasic.

NOTE: The power supply must be configured for RS232 and the same baud rate and parity as the controller.

‘Program to write and read via RS232.

‘Configure the power supply for 9600 baud, even parity and RS232

‘Configure serial port for:”

‘9600 baud

‘7 bit data

‘2 stop bits

‘Ignore request to send

‘Ignore carrier detect

‘

Even parity

‘ Needed with Vectra basic, ignored with QBasic

‘Send line feed

‘Reserve 1000 character buffer for serial I/O

DECLARE FUNCTION gets$ ()

CLS

 

 

‘ Clears screen

LOCATE 1,

1

 

‘ Position curser at top left

‘ Configure Com Port

 

 

OPEN “com1:9600,e,7,2,rs,cd,pe,lf” FOR RANDOM AS #1 LEN = 1000

PRINT #1, “OUTPUT ON”

‘ Turn on output then set voltage and current

PRINT #1, “VOLT 6”

 

‘ Set voltage to 6 volts

PRINT #1, “CURR .5”

 

‘ Set current to 0.5 amps

PRINT #1, “*IDN?”

 

‘ Query the power supply identification string

PRINT gets$

 

‘ Go to gets$ Function and print data returned

PRINT #1, MEAS”VOLT?”; volt

‘ Query the power supply voltage

Volt = VAL (gets$)

 

‘ Convert gets$ string to a value

PRINT gets$

 

‘ Print the value of the voltage

END

 

 

‘ End of main program

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Agilent Technologies 66332A, 6634B, 6633B, 6632B, 6614C, 6613C manual RS-232 Flow Control, RS-232 Programming Example, Baud Rate
Page 10 Page 12

6613C, 66312A, 6631B, 6611C, 6614C specifications

Agilent Technologies, a leader in electronic test and measurement solutions, offers a range of power supplies designed to meet various application needs. Notable models include the 6632B, 6634B, 66332A, 6633B, and 6612C. Each of these units provides unique features and technologies that cater to researchers, engineers, and technicians in the industry.

The Agilent 6632B is a single-output DC power supply that delivers up to 30V and 3A. It is known for its excellent load regulation and low noise, making it ideal for sensitive electronic testing. The model includes built-in voltage and current measurement capabilities, allowing users to monitor output conditions in real time. The 6632B is commonly used in laboratory environments, educational institutions, and manufacturing lines.

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In summary, Agilent Technologies’ power supply models—6632B, 6634B, 66332A, 6633B, and 6612C—offer an array of features that cater to a wide range of testing and research needs, ensuring reliable power delivery in various contexts.
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