Keithley 2450 - Page 212

Model 2450
Interactive SourceMeter® Instrument Reference Manual Section 3:
Functions and features
2450-901-01 Rev. B/September 2013 3-67
Digital I/O programming example
The programming commands below illustrate how to set bit B1 of the digital I/O port high, and then
read the value.
Using SCPI commands:
:DIGital:LINE1:MODE DIGital, OUT
:DIGital:LINE1:STATe 1
:DIGital:LINE1:MODE DIGital, IN
:DIGital:LINE1:STATe?
Using TSP commands:
-- Set bit B1 high
digio.line[1].mode = digio.MODE_DIGITAL_OUT
digio.line[1].state = digio.STATE_HIGH
-- Read digital I/O port
digio.line[1].mode = digio.MODE_DIGITAL_IN
print(digio.line[1].state)
Digital I/O bit weighting
Bit weighting for the digital I/O lines is shown in the following table.
Line # Bit Pin Decimal Hexadecimal Binary
1
B1
1
1
0x01
000001
2
B2
2
2
0x02
000010
3 B3 3 4 0x04 000100
4
B4
4
8
0x08
001000
5
B5
6
16
0x10
010000
6
B6
8
32
0x20
100000