Shifting Function (D/A Conversion) - Mitsubishi Electric Q64AD2DA User Manual

4
FUNCTION
4.3.5
The shifting function adds a setting quantity to a digital input value (shifting a analog output
value).
(1) Overview
Table 4.15 Settable range corresponding to the output ranges and processing of digital values exceeding settable range
Output range
Settable range
setting
(Real range)
0 : 4 to 20mA
H
1 : 0 to 20mA -96 to 4095
H
(Real range: 0 to 4000)
2 : 1 to 5V
H
3 : 0 to 5V
H
-4096 to 4095
4 : -10 to 10V
H
(Real range: -4000 to 4000)
(2) Setting methods

Shifting function (D/A conversion)

• The shifting amount to input value can be set within the range from -32768 to
32767.
• If a scaling function (for D/A conversion) is used simultaneously, scaling will be
performed after shifting.
• If the shifted values exceed the range from -32768 to 32767, the values will be
fixed to the upper limit (32767) and lower limit (-32768), respectively.
• CH5 Real conversion digital value (Un\G902) indicates a digital input value that
scaling and shifting are performed. (Refer to Section 4.3.4.)
• If the shifted values exceed the settable digital ranges corresponding to the set
output ranges, the D/A conversion will be performed according to Table 4.15.
• Changing the shifting amount to input value reflects the analog output value in
real time. Therefore, the analog output value can be adjusted with the shifting
function when the CPU is powered on.
Normal resolution mode
Processing for the case of
written digital values
exceeding settable range
4096 or more: 4095
-97 or less: -96
4096 or more: 4095
-4097 or less: -4096
(a) Set the quantity to be shifted by using CH5 Shifting amount to input value
(Un\G813).
(b) Shifting quantities are added to the digital input value set with CH5 Digital input
value (Un\G802) every conversion period.
(c) The default of the shifting amount to input value is 0.
(d) If a value is written to a shifting amount to input value, regardless of whether
Operating condition setting request (Y9) is set to on or off, the shifting amount to
input value will be added to digital input value.
High resolution mode
Settable range
(Real range)
-288 to 12287
(Real range: 0 to 12000)
-16384 to 16383
(Real range:
-16000 to 16000)
4.3 Function Details of D/A Conversion
4.3.5 Shifting function (D/A conversion)
Processing for the case of
written digital values
exceeding settable range
12288 or more: 12287
-289 or less: -288
16384 or more: 16383
-16385 or less: -16384
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