Parameter Details
12
12.9 L: Protection Functions
YASKAWA SIEPC71061753C GA500 Technical Manual 725
When the Run command is enabled, the drive constantly detects undertorque. The drive outputs a UL4 and
operation stops
■ L6-05: Torque Detection Level 2
No.
(Hex.)
Name Description
Default
(Range)
L6-05
(04A5)
Torque Detection Level 2
Sets the detection level for Overtorque/Undertorque Detection 2. In V/f control, drive rated output
current = 100% value. In vector control, motor rated torque = 100% value.
150%
(0 - 300%)
Note:
Overtorque/Undertorque Detection 2 cannot set the detection level for the analog input terminal.
■ L6-06: Torque Detection Time 2
No.
(Hex.)
Name Description
Default
(Range)
L6-06
(04A6)
Torque Detection Time 2
Sets the detection time for Overtorque/Undertorque Detection 2.
0.1 s
(0.0 - 10.0 s)
■ L6-07: Torque Detection Filter Time
No.
(Hex.)
Name Description
Default
(Range)
L6-07
(04E5)
Torque Detection Filter
Time
Sets the time constant for a primary filter to the torque reference or to the output current used to
detect overtorque/undertorque.
0 ms
(0 - 1000 ms)
■ 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
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