Load Fault Detection Setting (Pr.1488 To Pr.1491) - Mitsubishi Electric FR-F800 Instruction Manual

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, Upper limit
warning detection signal (LUP) is output. When the load is deviated from the detection width set in Pr.1489 Lower limit
warning detection width, Lower limit warning detection signal (LDN) is output. At the same time, Load fault warning (LDF)
appears on the operation panel.
• For the LUP signal, assign the function by setting "211 (forward action)" or "311 (reverse action)" in any of Pr.190 to Pr.196
(output terminal function selection). For the LDN signal, assign the function by setting "212 (forward action)" or "312
(reverse action)" 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.
• To prevent the repetitive on/off operation of the signal due to load fluctuation near the detection range, Pr.1492 Load
status detection signal delay time / load reference measurement waiting time can be used to set the delay time. Even
when a fault is detected out of the detection range once, the warning is not output if the characteristics value returns to the
normal range from a fault state within the output delay time.
Load reference
LUP
LDN
E.LDN
LDF warning indication
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 status
Pr.1492
Pr.1492
ON
ON
(H) Protective function parameter
Load reference 5 recorded
Pr.41
Pr.41
Pr.1492 Pr.1492 Pr.1492
3 4 5
ON ON ON
Pr.1492
Pr.1492
ON ON
Output shutoff
ON ON
Pr.41
Operation at the
set frequency
Time
0
ON
Upper limit fault detection width (Pr.1490)
Upper limit warning detection width (Pr.1488)
Lower limit warning detection width (Pr.1489)
Lower limit warning detection width (Pr.1491)
PARAMETERS
5
GROUP
H
257