Mitsubishi Electric MDS-B-SPJ2 Series Specification Manual page 104

１０
９.5 Ｖ
D/A output voltage (V)
(Current command)
５
0
(Example 2) Speed feedback
The data unit is r/min.
Thus, when the motor rotates at +2000rpm, 2000 is output as the actual data.
When parameter: SP255 (SP256) is 256 (magnification =1), the D/A output voltage at this
time exceeds the max. value. (DATA = 2000 > +128)
Thus, the setting value of parameter: SP255 (SP256) in this case is as follows:
DATA = 2000 ∗ {setting value} /256 < 128
From this,
{setting value} < 16.384 (= 128 ∗ 256/2000)
The data can be confirmed by setting SP255 (SP254) to 16.
The D/A output voltage value at this time is 9.88V (= 5V + {2000 x 16/256 x (5V/128)}.
2000
Speed FB conversion
0
value (r/min)
-2000
120
Current command
0
(rated current %)
-120
Example of speed/current command waveforms during acceleration/deceleration.
6. Status Display and Parameter Setting
Example of current command waveform
6 − 24
133％
120％
Current command
conversion value (%)
０％
Time
－133％
10V
D/A output voltage (V)
(speed FB)
5
Time
0V
Time