Mitsubishi Electric 800 Series Instruction Manual page 269

 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 (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.
• 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
NOTE
• 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.
268
5. PARAMETERS
5.7 (H) Protective function parameter
Load status
Pr.1492
Pr.1492
ON
ON
ON ON
Upper limit fault detection width (Pr.1490)
Upper limit warning detection width (Pr.1488)
Pr.1492 Lower limit warning detection width (Pr.1489)
Lower limit warning detection width (Pr.1491)
Pr.1492
ON
Output shutoff
ON