Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 595 / 1218

Parameters (M) Monitor display and monitor output signal
FR-A800 5 - 393
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.
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 (output terminal function selection) => page 5-378
Pr. 874 OLT level setting => page 5-90
Control method
Compared frequency
FU, FU2, FU3 FB, FB2, FB3, SU, LS
V/F control Output frequency Output frequency
Advanced magnetic flux vector
control Output frequency before the slip
compensation Output frequency before the slip
compensation
Real sensorless vector control Frequency command value
Estimated frequency (estimated from
the actual motor speed)
Encoder feedback control
Actual motor speed converted as
frequency Actual motor speed converted as
frequency
Vector control Frequency command value
Actual motor speed converted as
frequency
PM sensorless vector control Frequency command value
Estimated frequency (actual motor
speed)