Mitsubishi MELSEC-Q series User Manual page 41

3
SPECIFICATIONS
(2) When using the user range setting for the output range
(a) Set a digital value, which is equivalent to the analog gain value to be output, as
(b) The D/A conversion uses values calculated from the following formula.
the scaling upper limit value. Also, set a digital value, which is equivalent to the
analog offset value to be output, as the scaling lower limit value.
[Example] User range setting 2, Offset value: 1V, Gain value: 8V
Analog output value (V)
8
1
0
-6
Scaling lower
limit value
Digital values actually
=
used for D/A conversion
D : Digital input value
X
D : Maximum digital input value of the output range used
Max
S : Scaling upper limit value
H
S : Scaling lower limit value
L
[Example]
When a digital input value of 4000 is input under the following setting:
Output range: User range setting 2, High resolution mode,
Scaling upper limit value: 13000, Scaling lower limit value: 2000
Digital values actually used for D/A conversion
12000
= (4000-2000)
13000-2000
= 2181.81
= 2181
Fractional part is rounded down.
Digital input value
Scaling upper
limit value
D
Max
(D S )
X- L
S S
H- L
3.2 Function List
3.2.5 Scaling function
1
2
3
4
5
6
7
8
3
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