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

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Torque control under Real sensorless vector control and vector control Parameters
5 - 146
Speed limit mode 2 (Pr. 1113 = "0", initial value)
●
Following the polarity change in the torque command, the polarity of the speed limit value
changes. This prevents the speed from increasing in the torque polarity direction. (When the
torque command is 0, the polarity of the speed limit value is positive.)
●
When Pr. 807 "Speed limit selection" = "0 or 2", the speed setting value for speed control is applied
for the speed limit. When Pr. 807 "Speed limit selection" = "1", the setting of Pr. 808 "Forward
rotation speed limit/speed limit" is applied for the speed limit.
●
When the load has reversed the rotation opposite to the torque polarity, the setting of Pr. 809
"Reverse rotation speed limit/reverse-side speed limit" is applied for the speed limit. (The speed
limit value and reverse-side speed limit value are limited at Pr. 1 "Maximum frequency" (maximum
400 Hz under vector control).)
I002817E
Fig. 5-52: Speed limit mode 2
ON
Time
When the torque command value is positive When the torque command value is negative
Speed limit value
Torque
command value
Range where torque
control is available
Speed limit value
Reverse side speed
limit value
Pr. 809
Range where torque
control is available
Rotation speed
Rotation speed
Range where torque
control is available
Reverse side speed
limit value
Reverse side speed
limit value
Start signal
Start signal
OFF
OFF
ON
Time
Speed limit value
Speed limit value
Reverse side speed
limit value
Pr. 809
Pr. 809
Pr. 809
Pr. 7
Pr. 8
Pr. 8
Pr. 7
Rotation speed