Mitsubishi FX1S Series Programming Manual page 407

FX Series Programmable Controllers
[(4000 - 0) / (B-A)] = D8114 / (D30 - A)
D8114 = [4000 x D30 / (B - A)] - [(4000 x A) / (B - A)]
If A = 500 and B = 5500, then
D8114 = (4/5) X D30 - 400
Example Application Program #5
If using a digital range of C ~ D in the program to output an analog value of A ~ B, the digital
value must be converted to the 0 ~ 4000 equivalent and the analog value must be converted to
0 ~ 10 Volt equivalent.
Digital Values for conversion to analog are stored in D8114.
Digital value
(D8114) for practical
analog output
Please see prior programming examples for sample equations for the conversion of data
ranges.
D8114 = [(B'-A') x D40] / (D-C) + [(A' x D) - (B' x C) / (D - C)
D8114 = [(400 x B - 400 x A) x D20] / (D-C) + [(400 x A x D) - (400 x B x C)] / (D - C) (from prior
examples A' = 400 x A and B' = 400 x B
D8114 = [400 x (B - A)] / (D - C) + 400 x [(A x D) - (B x C)] / (D - C)
If A = 1, B = 5.5, C = 1000, and D = 5500, then
D8114 = (2 x D40) / 5
M8001
FNC 22
MUL
FNC 23
D
FNC 12
MOV
M8001
M8000
FNC 22
FNC 23
FNC 21
FNC 12
4000
B'
A'
0
0 C
Digital value (D40) for output
M8114
K2 D40 D42
D42 K5 D44
DIV
D44 D8114
K4 D30
MUL
D32 K5
D DIV
D34 K400
D SUB
D38 D8114
PIOV
Analog
output value
D
Assigning System Devices 9
M8114
D32
D34
D38
10V
B
A
0
0 A' B'
Digital value (D8114) for output
4000
9-7