Chapter 1 Introduction
1-4
2) 0 ~ 10VDC range
When the A/D module operates with 0 ~ 10VDC range, the 0VDC analog input is
converted to digital 0, and the 10VDC analog input is converted into digital output 4000.
Therefore, the resolution per 1 digital value is 0.0025VDC.
Figure 1.4 A/D conversion characteristic ( 0 ~ 10VDC )
3) –10 ~ 10VDC range
When the A/D module operates with –10 ~ 10VDC range, the 10VDC analog input is
converted to digital 0, and the 10VDC analog input is converted into digital output 4000.
Therefore, the resolution per 1 digital value is 0.005VDC.
Figure 1.5 A/D conve rsion characteristic ( -10 ~ 10VDC )
2000
2001
2002
1998
1999
5.000V
5.0025V4.9975V
5.005V
4.995V
4000
2000
05V
10V
Analog input voltage
Digital output value
0V
2000
2001
2002
1998
1999
0.000V
0.005V
-0.005V
0.010V
-0.010V
4000
2000
00V
10V
Analog input voltage
Digital output value
-10V