Mitsubishi Electric Q66DA-G, User Manual

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3
- 17 3.2 Function List
3.2.5 Scaling function
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
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
(b) The D/A conversion uses values calculated from the following formula.
D
X
: Digital input value
D
Max
: Maximum digital input value of the output range used
S
H
: Scaling upper limit value
S
L
: Scaling lower limit value
[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
-6
1
0
8
Digital input value
Analog output value (V)
Scaling lower
limit value Scaling upper
limit value
Digital values actually
used for D/A conversion D
Max
S
H-
S
L
(D
X-
S
L
) =
=
= 2181.81
= 2181
12000
13000-2000
(4000-2000)
Digital values actually used for D/A conversion
Fractional part is rounded down.