Mitsubishi Electric FR-A700 Instruction Manual page 690

Special operation
Fig. 6-254: Connection diagram (source logic, Pr. 186 = 19)
The used terminal changes according to the Pr. 180 to Pr. 189 (input terminal function
selection) settings
Load torque high speed frequency control setting
● Set "2 or 3" in Pr. 270 "Stop-on contact/load torque high-speed frequency control selection."
● When operating with the load torque high speed frequency function selection signal (X19)
on, the inverter automatically changes the maximum frequency within the setting range of
Pr. 4 "Multi-speed setting (high speed)" and Pr. 5 according to the magnitude of the average
current during the time to accelerate from 1/2 of the frequency set in Pr. 5 "Multi-speed
setting (middle speed)" to the frequency set in Pr. 5 .
● Set "19" in Pr. 178 to Pr. 189 (input terminal function selection) and assign the X19 signal
function to the input terminal.
● This function cab made valid only in the external operation mode.
● This control can be activated at every start.
Fig. 6-255: Output frequency vs. average current
6 - 510
MCCB
Power supply
Start signal
Load torque high-speed
frequency
Current averaging range
Less than
Pr. 271 × rated current
MC
Power running
ON OFF
ON OFF
Mechanical
brake
Motor
Regenerating
Zeit
Current averaging range
Pr. 272 × rated current
or more
ON
ON
Parameter
I001624E
I001625E