Rockwell Automation 1395 Digital Reference Adapter Board - Manual (Page 52)

Chapter 6
StartĆUp
6-6
Figure 6.3
Analog Input Example: Potentiometer +/- 10V range to control 0 to +/- 100% Base
Speed
Digital Scale
P550
A
D
Multiplexer
Analog #1
Pot +/-
10V DC
+ / - 2048
Programmable
Analog
Gain
P554 = 0
Multiply Input
by 1
To Main
Control
Board
Digital Offset
P551 = 0 VDC
Analog Offset
P555 = 0VDC
+10V
0
-10V
+10V
0
-10V
+ 2048
0
- 2048
+ 4096
0
- 4096
Analog Input - 10V + 10V 0
- 10V 0 + 10V Potentiometer
0 0 0
- 10V + 10V 0
Analog Offset P555 = 0
Result
Analog Gain P554 = 0 x 1 x 1 x 1
+ 2048
0
- 2048
- 10V + 10V 0
Result
-2048 + 2048 0
Digital Value
Digital Scale P551 = 0
0 0 0
0
Result -2048 + 2048
Digital Offset P550 = 2 x 2 x 2 x 2
-4096 + 4096 0
Final Result