Mitsubishi Electric 800 Series Instruction Manual page 328

 Analog speed command input offset adjustment (Pr.849)
• This is used to set a range in which the motor is stopped for prevention of incorrect motor operation in a very low speed
rotation by the analog input speed command.
• Regarding the Pr.849 Analog input offset adjustment value 100% is 0, the offset voltage is set as described below:
100% < Pr.849 ...... Positive side
100% > Pr.849 ...... Negative side
The detailed calculation of the offset voltage is as described below:
Offset voltage [V] = Voltage at the time of 100% (5 V or 10 V
*1 It depends on the Pr.73 setting.
Frequency
command
0%
0% 100%
NOTE
• Under PID control, the analog input filter is invalid (no filter).
Parameters referred to
Pr.73 Analog input selection
Pr.125, Pr.902, Pr.903 (bias and gain of the terminal 2 frequency setting)
Slope determined
according to Pr.125,
Pr.902 and Pr.903
Slope does not
change.
Speed setting
100%
signal
(10 V or 5 V)
200% Pr.849 setting
page 318
*1
)  (Pr.849 - 100)/100
page 328
5.9 (T) Multi-Function Input Terminal Parameters
3
4
5
5
5
6
7
8
9
10
327
5. PARAMETERS