Mitsubishi Electric 800 Series Instruction Manual page 260

NOTE
• All signals are OFF during the DC injection brake operation and during tuning at start-up.
• The reference frequency in comparison with the set frequency differs depending on the control method.
Control method or function
V/F control
Advanced magnetic flux vector
control
Real sensorless vector control
PM sensorless vector control
• Setting a higher value in Pr.870 causes a lower responsivity of the signals for frequency detection (SU, FB, and LS signals).
• The logic (ON/OFF switching) of the LS signal is the reverse of that of 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
Pr.874 OLT level settingpage 100
Output frequency
Output frequency before the slip
compensation
Frequency command value
Frequency command value
selection)page 250
Reference frequency
FU
Output frequency
Output frequency before the slip
compensation
Estimated frequency (actual motor
speed)
Estimated frequency (actual motor
speed)
11. (M) Item and Output Signal for Monitoring
11.7 Output frequency detection
11
12
FB, SU, LS
13
14
15
16
17
18
19
20
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