Keithley 2651A Reference Manual

Model 2651A High Power System SourceMeter® Instrument Reference Manual Section 7: Command reference
2651A-901-01 Rev. A / March 2011 7-43
digio.readbit()
This function reads one digital I/O line.
Type TSP-Link accessible
Affected by Where saved Default value
Function Yes
Usage
data = digio.readbit(N)
data
A custom variable that stores the state of the I/O line
N
Digital I/O line number to be read (1 to 14)
Details
A returned value of zero (0) indicates that the line is low. A returned value of one (1) indicates that the line is
high.
Example
print(digio.readbit(4))
Assume line 4 is set high, and it is then read.
Output:
1.00000e+00
Also see
Digital I/O port
digio.readport()
(on page 7-43)
digio.writebit() (on page 7-51)
digio.writeport()
(on page 7-52)
digio.readport()
This function reads the digital I/O port.
Type TSP-Link accessible
Affected by Where saved Default value
Function Yes
Usage
data = digio.readport()
data
The present value of the input lines on the digital I/O port
Details
The binary equivalent of the returned value indicates the value of the input lines on the I/O port. The least
significant bit (Bit B1) of the binary number corresponds to line 1; Bit B14 corresponds to line 14.
For example, a returned value of 170 has a binary equivalent of 000000010101010, which indicates that lines 2,
4, 6, and 8 are high (1), and the other 10 lines are low (0).

Keithley 2651A Specifications

General

Brand	Keithley
Model	2651A
Category	Measuring Instruments
Language	English