Serial.read() - Keithley 2651A Reference Manual

High power system sourcemeter instrument

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Section 7: Command reference

Allow ample time for the command to be processed before attempting to communicate with the

instrument again. If possible, set parity from one of the other command interfaces or from the front

The reset function has no effect on parity.

serial.parity = serial.PARITY_NONE

RS-232 interface operation

(on page 7-163)

serial.databits

serial.flowcontrol

serial.read()

This function reads available characters (data) from the serial port.

TSP-Link accessible

data = serial.read(maxchars)

This function will read available characters from the serial port. It will not wait for new characters to arrive. As

long as maxchars is less than 200 characters, all characters received by the serial port (before the

serial.read() command is executed) are returned. If too many characters are received between calls to this

function, the RS-232 buffers will overflow and some characters may be lost.

Call this function as many times as necessary to receive the required number of characters. For optimal

performance, use a small delay between repeated calls to this function.

The data returned is the raw data stream read from the port. No characters, such as control characters or

terminator characters, are interpreted nor will the data stream be altered.

This function cannot be used if the serial port is enabled as a command interface; a settings conflict error will be

data = serial.read(200)

Model 2651A High Power System SourceMeter® Instrument Reference Manual

(on page 2-81)

(on page 7-164)

An integer that specifies the maximum number of characters to read

A string consisting of all data read from the serial port

Sets parity to none.

Default value

Read data from the serial port.

The above output indicates that the string "John

Doe" was read from the serial port.

2651A-901-01 Rev. A / March 2011