Mitsubishi Electric FR-A820-00046 Instruction Manual page 537

Parameters
Automatic measurement of the load characteristics reference
(Load characteristics measurement mode) (Pr. 1480)
NOTES Perform measurement under actual environment with the motor connected.
Set the Pr. 1487 "Load characteristics minimum frequency" higher than the Pr. 13 "Starting fre-
quency".
● Setting Pr. 1480 "Load characteristics measurement mode" = "1" enables automatic measurement
of the load characteristics reference. (Load characteristics measurement mode)
● Use Pr. 1486 and Pr. 1487 to set the frequency band for the measurement, and set Pr. 1480 = "1".
After setting, when the inverter is started, the measurement starts.
● The automatically measured load characteristics reference is written in Pr. 1481 to Pr. 1485.
● After the measurement is started, read Pr. 1480 to display the status of the measurement. If "8"
appears in the tens place, the measurement has not properly completed.
Tens place
Tab. 5-127: Display of the status of the measurement (Pr. 1480)
● While measuring automatically, the During load characteristics measurement signal (Y213) is
output. For the Y213 signal, assign the function by setting "213 (positive logic)" or "313 (negative
logic)" in any of Pr. 190 to Pr. 196 (output terminal function selection).
● Setting "8888" in Pr. 1481 to Pr. 1485 enables fine adjustment of load characteristics. When setting
Pr. 1481 to Pr. 1485 = "8888" during operation, the load status at that point is set in the parameter.
(Only when the set frequency is within ±2 Hz of the frequency of the measurement point, and SU
signal is in the ON state).
FR-A800
Read value of Pr. 1480
Ones place
— 1
— 2
— 3
— 4
— 5
— 0
8 1 to 5
Status
During measurement from the starting point to Point 1
During measurement from Point 1 to Point 2
During measurement from Point 2 to Point 3
During measurement from Point 3 to Point 4
During measurement from Point 4 to Point 5
Normal completion
Termination of measurement by an activation of a protective function, inverter
reset, turning ON of MRS signal, turning OFF of the start command, or timeout.
(The value in the ones place represents the above-mentioned measurement
point.)
(H) Protective function parameter
5 - 335