Mitsubishi Electric FR-A800 Series Instruction Manual page 237

 Control block diagram
Terminal 2
Terminal 4
[Pr.858 = 0]
Terminal 1
[Pr.868 = 0]
RL
RM
RH
REX
Option
Operation panel
DC injection brake operation
NOTE
• The RT (Second function selection) signal and the X9 (Third function selection) signal are used to enable switching between
acceleration/deceleration time settings. The acceleration/deceleration time after switching depends on the settings in Pr.44
Second acceleration/deceleration time and Pr.45 Second deceleration time, or Pr.110 Third acceleration/deceleration
time and Pr.111 Third deceleration time. The acceleration/deceleration time is a period of time taken to reach Pr.20
Acceleration/deceleration reference frequency.
• Pr.21 Acceleration/deceleration time increments is used to change the setting increment.
• When the automatic restart after instantaneous power failure is selected, the inverter accelerates the motor from the frequency
search result frequency to the set frequency. (Pr.57 Restart coasting time ≠ 9999, Pr.162 Automatic restart after
instantaneous power failure selection = "10, 12, 13, 1010, 1012, or 1013")
• Pr.811 Set resolution switchover is used to change the setting increment for speed setting, operation speed monitoring, and
torque limit setting.
• Pr.862 Encoder option selection is used to change the Vector control compatible plug-in option or the control terminal option
for the first and second motors.
• To avoid overdriving the motor due to incorrect encoder pulse settings, the output frequency can be limited with the set
frequency plus the value set in Pr.873 Speed limit.
236
5. PARAMETERS
5.3 Speed control under Real sensorless vector control, vector control, PM sensorless vector control
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AU signal
Terminal 2 bias [C2, C3(Pr.902)]
Terminal 2 gain [Pr.125, C4(Pr.903)]
OFF
Terminal 4 bias [C5, C6(Pr.904)]
Terminal 4 gain [Pr.126, C7(Pr.905)]
ON
RT signal [Pr.822]
OFF ≠9999
Speed setting
=9999
filter
[Pr.832]
ON
≠9999
=9999
Multi-speed
selection
[Pr.4 to 6,
24 to 27,
232 to 239]
Upper/lower limit setting
[Pr.1]
[Pr.2]
Pre-excitation selection
[Pr.802]
1
Servo lock
0
Zero speed control
Deceleration stop
Zero speed control
Brake operation selection
[Pr.850]
Deceleration stop
1
Servo lock
0
search engine
Analog input offset adjustment
[Pr.849]
[Pr.822]
[Pr.74]
[Pr.822]
[Pr.74]
Acceleration/deceleration
[Pr.13]
[Pr.7]
LX signal ON Vector control
LX signal
Real sensorless
[Pr.11]
vector control
ON
[Pr.11]
OFF
Operation mode
[Pr.79]
Analog input
selection
[Pr.73]
Running
[Pr.10]
[Pr.8]
During stop
Control mode
A