803
Data Control Instructions Section 3-18
Scaling 1 to 5-V Analog Input to –200 to 200
In the following example, it is assume that an analog signal from 1 to 5 V is
converted and input to CIO 2005 as 0000 to 0FA0 hexadecimal. SCL2(486) is
used to convert (scale) the value in CIO 2005 to a value between –0200 and
0200 BCD.
When CIO 000000 is ON, the contents of CIO 2005 is scaled using the linear
function defined by
∆X (0FA0), ∆Y (0400), and the offset (07D0). These values
are contained in D00100 to D00102, and the result is output to D00200.
∆X
∆Y
(∆X)
P1:
P1+1:
P1+2:
P1
R
Contents of R (D00200)
Contents of S (CIO 0205)
Offset
1068Hex
X
∆
P1:
P1+1:
P1+2:
0400 (∆Y)
P1
R
0FA 0
D00100
D00101
D00102
∆
Y
Offset
Contents of R (D00200)
Offset
07D0 Hex
Contents of S (CIO 0200)
0FA0 Hex
(∆X)
To Next Page
Loading...
