Mitsubishi Electric 800 Series, Instruction Manual, Page: 342 / 727

(H) Protective function parameter
PARAMETERS
341
5
GROUP
H
• 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.)
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.
f2
f1( Pr.1487 )
f3
f4
f5( Pr.1486 )
Frequency(Hz)
Time
Pr.1492
Load reference
1 recorded
Load reference 2 recorded
Load reference 3 recorded
Load reference 4 recorded
Load reference 5 recorded
STF
＝
ON
Pr.1480 =1
Measurement start
Example of starting measurement from the stop state
SU signal
Y213
1 2 3 4 5 0
Read value of Pr.1480
Pr.41
Pr.41
Pr.41
Pr.41
Pr.41
Pr.1492 Pr.1492 Pr.1492 Pr.1492
STF ON
ON
ON ON ON ON ON ON
Operation at the
set frequency