Parameter Details
12
12.9 L: Protection Functions
YASKAWA SIEPC71061705H GA700 Series Technical Manual 905
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.
■ L6-10: Mech Fatigue Detect Delay Time
No.
(Hex.)
Name Description
Default
(Range)
L6-10
(046A)
Mech Fatigue Detect Delay
Time
Sets the time for mechanical deterioration detection.
0.1 s
(0.0 - 10.0 s)
When the detection conditions set in L6-08 [Mechanical Weakening Detect Ope] continue for the time set in L6-
10, the drive will detect mechanical weakening.
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