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

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Parameters (H) Protective function parameter
FR-A800 5 - 337
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.
I003028E
Fig. 5-147: Load status and fault detection
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.
LUP
LDN
E.LDN
Load status
Load
reference
Output shutoff
Pr. 1492
Pr. 1492
Pr. 1492
Pr. 1492
LDF warning
indication
Lower limit warning detection
width (Pr. 1489)
Lower limit fault detection
width (Pr. 1491)
Upper limit fault detection
width (Pr. 1490)
Upper limit warning
detection width (Pr. 1488)
ON
ON
ON
ON
ON ON