12.9 L: Protection Functions
994 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
■ L6-08: Mechanical Fatigue Detect Select
No.
(Hex.)
Name Description
Default
(Range)
L6-08
(0468)
Mechanical Fatigue Detect
Select
Sets the speed where the drive detects mechanical deterioration and how the drive operates (operation
status) after detection.
0
(0 - 8)
The drive detects mechanical weakening through overtorque or undertorque as specified by the conditions set in L6-
08 to L6-11 [Mechanical Deterioration Detection Settings Parameters]. Set overtorque/undertorque detection
conditions in L6-01 to L6-03 [Torque Detection 1 Settings Parameters]. The drive disables the operation selection set
in L6-01 [Torque Detection Selection 1].
0 : Disabled
The drive does not detect mechanical weakening.
1 : oL5 @ Speed > L6-09 - Alarm
When the speed (signed) ≥ L6-09 [Mech Fatigue Detect Speed Level], the drive detects mechanical weakening. The
drive will detect oL5 [Mechanical Weakening Detection 1] and continue operation.
2 : oL5 @ |Speed| > L6-09 - Alarm
When the speed (absolute value) ≥ L6-09, the drive detects mechanical weakening. The drive will detect oL5 and
continue operation.
3 : oL5 @ Speed > L6-09 - Fault
When the speed (signed) ≥ L6-09, the drive detects mechanical weakening. The drive will detect oL5 and stop
operation.
4 : oL5 @ |Speed| > L6-09 - Fault
When the speed (absolute value) ≥ L6-09, the drive detects mechanical weakening. The drive will detect oL5 and stop
operation.
5 : UL5 @ Speed < L6-09 - Alarm
When the speed (signed) ≤ L6-09, the drive detects mechanical weakening. The drive will detect UL5 [Mechanical
Weakening Detection 2] and continue operation.
6 : UL5 @ |Speed| < L6-09 - Alarm
When the speed (absolute value) ≤ L6-09, the drive detects mechanical weakening. The drive will detect UL5 and
continue operation.
7 : UL5 @ Speed < L6-09 - Fault
When the speed (signed) ≤ L6-09, the drive detects mechanical weakening. The drive will detect UL5 and stop
operation.
8 : UL5 @ |Speed| < L6-09 - Fault
When the speed (absolute value) ≤ L6-09, the drive detects mechanical weakening. The drive will detect UL5 and stop
operation.
■ L6-09: Mech Fatigue Detect Speed Level
No.
(Hex.)
Name Description
Default
(Range)
L6-09
(0469)
Mech Fatigue Detect Speed
Level
Sets the speed level where the drive will operate the mechanical deterioration detection function, as a
percentage of the Maximum Output Frequency.
110.0%
(-110.0 - 110.0%)
Parameters L6-01 to L6-03 [Torque Detection 1 Settings Parameters] set the overtorque/undertorque detection
conditions.
When L6-08 = 2, 4, 6, 8 [Mechanical Fatigue Detect Select = Speed : unsigned], the setting value of L6-09 is the
absolute value. When L6-09 is set to a negative number, the drive processes this value as a positive number.
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