Load Characteristics Fault Detection - Mitsubishi Electric 800 Series Instruction Manual

10.11

Load characteristics fault detection

This function is used to monitor whether the load is operating in normal condition by storing the speed/torque relationship in
the inverter to detect mechanical faults or for maintenance. When the load operating condition deviates from the normal range,
the protective function is activated or the warning is output to protect the inverter or the motor.
Pr. Name
1480 Load characteristics
H520 measurement mode
1481 Load characteristics load
H521 reference 1
1482 Load characteristics load
H522 reference 2
1483 Load characteristics load
H523 reference 3
1484 Load characteristics load
H524 reference 4
1485 Load characteristics load
H525 reference 5
1486 Load characteristics
H526 maximum frequency
1487 Load characteristics
H527 minimum frequency
1488 Upper limit warning detection
H531 width
1489 Lower limit warning detection
H532 width
1490 Upper limit fault detection
H533 width
1491 Lower limit fault detection
H534 width
Load status detection signal
1492
delay time / load reference
H535
measurement waiting time
*1 Gr.1 and Gr.2 are the parameter initial value groups. (Refer to
 Load characteristics reference setting (Pr.1481 to Pr.1487)
• Use Pr.1481 to Pr.1485 to set the reference value of load characteristics.
*1
Initial value
Setting
range
Gr.1 Gr.2
0
1
0
2, 3, 4, 5,
81, 82, 83,
84, 85
9999
9999
9999 0% to 400%
9999
9999
60 Hz 50 Hz 0 to 590 Hz
6 Hz 0 to 590 Hz
0% to 400%
20%
9999
0% to 400%
20%
9999
0% to 400%
9999
9999
0% to 400%
9999
9999
1 s 0 to 60 s
page 82).
Description
Load characteristics measurement mode does not start.
(Measurement of load characteristics complete without fault.)
Load characteristics measurement mode is started.
The load characteristics measurement status is displayed.
(Read-only)
Used to set the reference value of normal load characteristics.
8888: The present load status is written as reference status.
9999: The load reference is invalid.
Used to set the upper frequency limit of the load characteristics
fault detection range.
Used to set the lower frequency limit of the load characteristics
fault detection range.
Used to set the detection range of when the upper limit load fault
warning is output.
Function disabled
Used to set the detection range of when the lower limit load fault
warning is output.
Function disabled
Used to set the detection range of when output is shut-off when
the upper limit load fault occurs.
Function disabled
Used to set the detection range of when output is shut-off when
the lower limit load fault occurs.
Function disabled
Used to set the waiting time after the load fault is detected until
warning output or output shutoff.
In the load characteristics measurement mode, set the waiting
time after the load measurement frequency is reached until the
load reference is set.
10. (H) Protective Function Parameters
10.11 Load characteristics fault detection
1
2
3
4
5
6
7
8
9
10
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