Mitsubishi Electric FR-A820-00046 Instruction Manual page 595

Parameters
NOTES In the initial setting, the FU signal is assigned to the terminal FU, and the SU signal is assigned to
the terminal SU.
All signals turn OFF during DC injection brake, pre-excitation (zero speed control, servo lock) and
tuning at start-up.
Each signal's reference frequency differs by the control method.
Control method
V/F control
Advanced magnetic flux vector
control
Real sensorless vector control
Encoder feedback control
Vector control
PM sensorless vector control
Setting a higher value in Pr. 870 slows the response of frequency detection signals (SU, FB, FB2,
FB3, and LS).
The ON/OFF logic for the LS signal is opposite for the FB signal.
Changing the terminal assignment using Pr. 190 to Pr. 196 (output terminal function selection)
may affect the other functions. Set parameters after confirming the function of each terminal.
Parameters referred to
Pr. 190 to Pr. 196
Pr. 874
FR-A800
FU, FU2, FU3
Output frequency
Output frequency before the slip
compensation
Frequency command value
Actual motor speed converted as
frequency
Frequency command value
Frequency command value
(output terminal function selection)
OLT level setting
(M) Monitor display and monitor output signal
Compared frequency
FB, FB2, FB3, SU, LS
Output frequency
Output frequency before the slip
compensation
Estimated frequency (estimated from
the actual motor speed)
Actual motor speed converted as
frequency
Actual motor speed converted as
frequency
Estimated frequency (actual motor
speed)
=>
=>
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page 5-90
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