Mitsubishi Electric FR-A700 EC, Instruction Manual

Page: 690 / 826

Special operation Parameter
6 - 510
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.
I001624E
Fig. 6-254: Connection diagram (source logic, Pr. 186 = 19)
I001625E
Fig. 6-255: Output frequency vs. average current
Start signal
Load torque high-speed
frequency
MC
Mechanical
brake
Motor
MCCB
Power supply
Power running Regenerating
Zeit
Output frequency
ON
ON
ON
ON OFF
OFF
Current averaging range
Less than
Pr. 271
×
rated current
Current averaging range
Pr. 272
×
rated current
or more