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 [Mech Fatigue Hold Off Time]. You can use U4-01 [Cumulative Ope Time] 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 [Mechanical Fatigue Detect Select] and L6-09 [Mech Fatigue Detect Speed Level] for the length of time set in L6-10 [Mech Fatigue Detect Delay Time]. The drive uses L6-01 to L6-03 [Torque Detection 1 Setting Parameter] 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 H2-04 [MFDO Function Select].

Table 1. Mechanical Weakening Detection Settings Parameters
Configuration Parameter		Mechanical Deterioration Detection
MFDO Function Select Terminals M1-M2 Terminals M3-M4 Terminals P1-C1 Terminals P2-C2		H2-01, H2-02, H2-03, H2-04 = 22
Operation Selection after Detection		L6-08
Detection Start Time		L6-11
Speed Range	Detection Criteria	L6-08
	Detection Level	L6-09
	Detection Time	L6-10
Overtorque	Detection Criteria	L6-01
	Detection Level	L6-02
	Detection Time	L6-03