Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 420

• 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.)
Frequency(Hz)
f5(Pr.1486)
f4
f3
f2
f1(Pr.1487)
STF＝ON
Pr.1480=1
Measurement start
Read value of Pr.1480
STF
Y213
SU signal
NOTE
• Even if the load measurement is not properly completed, the load characteristics fault is detected based on the load
characteristics found by the already-completed portion of the measurement.
• During the load characteristics measurement, the load characteristics fault detection is not performed.
• During the load characteristics measurement, linear acceleration/deceleration is performed even if the S-pattern acceleration/
deceleration is set.
• 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.
 Load fault detection setting (Pr.1488 to Pr.1491)
• When the load is deviated from the detection width set in Pr.1488 Upper limit warning detection width, the Upper limit
warning detection (LUP) signal is output. When the load is deviated from the detection width set in Pr.1489 Lower limit
warning detection width, the Lower limit warning detection (LDN) signal is output. At the same time, the Load fault
warning (LDF) appears on the operation panel.
• For the LUP signal, assign the function by setting "211 (positive logic)" or "311 (negative logic)" in any of Pr.190 to Pr.196
(Output terminal function selection). For the LDN signal, assign the function by setting "212 (positive logic)" or "312
(negative logic)" in any of Pr.190 to Pr.196 (Output terminal function selection).
• When the load is deviated from the detection width set in Pr.1490 Upper limit fault detection width, the protective
function (E.LUP) is activated and the inverter output is shut off. When the load is deviated from the detection width set in
Pr.1491 Lower limit fault detection width, the protective function (E.LDN) is activated and the inverter output is shut off.
Example of starting measurement from the stop state
Load reference 4 recorded
Load reference 3 recorded
Load reference 2 recorded
Pr.41
Load reference
1 recorded
Pr.41
Pr.1492 Pr.1492
1 2
ON
ON
ON ON
Load reference 5 recorded
Pr.41
Pr.41
Pr.1492 Pr.1492 Pr.1492
3 4 5
ON ON ON
5.10 (H) Protective function parameter
Pr.41
Operation at the
set frequency
Time
0
ON
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10
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