Omron Q2A Series Technical Manual page 767

Note:
The drive applies a hysteresis of approximately 10% of the drive rated output current or the motor rated torque to the overtorque/
undertorque detection function.
Undertorque Detection Time Chart
When you use Overtorque/Undertorque Detection 1, the drive detects undertorque if the motor current or motor
torque is less than or equal to the detection level set in L6-02 for the time set in L6-03.
Parameter L6-01 sets the operation after detection. When you use Overtorque/Undertorque Detection 2, set the
operation in L6-05, L6-06, and L6-04.
Set the terminal that outputs an alarm in H2-01 to H2-03.
Note:
The drive applies a hysteresis of approximately 10% of the drive rated output current or the motor rated torque to the overtorque/
undertorque detection function.
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Mechanical Weakening Detection
The Mechanical Weakening Detection function detects the mechanical weakening of a machine that can cause
overtorque or undertorque because of motor speed and total drive operation time.
The drive activates the function if the drive total operation time is longer than the time set in L6-11 [MechFatigue
Hold Off Time]. You can use U4-01 [Cumulative OpeTime] to monitor the total operation time.
Parameter Settings
The drive detects Mechanical Weakening if overtorque or undertorque occur during the speed range set in L6-08
[MechF Enable] and L6-09 [MechFatigue Speed Detect Level] for the length of time set in L6-10 [MechFatigue
Delay Time]. The drive uses L6-01 to L6-03 [Trq Det1 Select to Trq Det1 Time] to detect oL5 [Mechanical
Weakening Detection 1] or UL5 [Mechanical Weakening Detection 2]. Parameter L6-08 sets the operation after
detection.
Set the terminal that outputs the fault in H2-01 to H2-03 [DO Function Select].
Table 12.56 Mechanical Weakening Detection Settings Parameters
DO Function Select
• Terminals 2NO-2CM
• Terminals 3NO-3CM
• Terminals 4NO-$CM
Operation Selection after Detection
Detection Start Time
Speed Range
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
Figure 12.136 Overtorque Detection Time Chart
Figure 12.137 Undertorque Detection Time Chart
Configuration Parameter
Detection Criteria
Detection Level
Detection Time
12.8 L: PROTECTION
Mechanical Deterioration Detection
H2-01, H2-02, and H2-03 = 66
L6-08
L6-11
L6-08
L6-09
L6-10
12
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