L6: Torque Detection - YASKAWA U1000 Series Technical Manual

5.8 L: Protection Functions
To output a signal during fault restart, set H2-01, H2-02, or H2-03 to 1E.
L5-01: Number of Auto Restart Attempts
■
Sets the number of times that the drive may attempt to restart itself.
The method of incrementing the restart counter is determined by the setting of parameter L5-05. When the counter
reaches the number set in L5-01, the operation stops and the fault has to be reset manually after correcting the cause.
The restart counter is incremented at each restart attempt, regardless of whether the attempt was successful. When the
counter reaches the number set in L5-01, the operation stops and the fault has to be reset manually after correcting the
cause.
The number of fault restarts is reset back to zero when:
• The drive operates normally for ten minutes following a fault restart.
• A fault is cleared manually after protective functions are triggered.
• The power supply is cycled.
No.
L5-01
■ L5-02: Auto Restart Fault Output Operation Selection
Determines if a fault output is triggered (H2- = E) when the drive attempts to restart.
No.
L5-02
Setting 0: No fault output
Setting 1: Fault output is set
L5-04: Fault Reset Interval Time
■
Determines the amount of time to wait between restart attempts when parameter L5-05 is set to 1.
No.
L5-04
L5-05: Fault Reset Operation Selection
■
No.
L5-05
Setting 0: Count successful restarts
The drive will continuously attempt to restart. If it restarts successfully, the restart counter is increased. This operation is
repeated each time a fault occurs until the counter reaches the value set in L5-01.
Setting 1: Count restart attempts
The drive will try to restart using the time interval set in parameter L5-04. A record is kept of the number of attempts to
restart to the drive, regardless of whether or not those attempts were successful. When the number of attempted restarts
exceeds the value set to L5-01, the drive gives up trying to restart.

◆ L6: Torque Detection

The drive provides two independent torque detection functions that trigger an alarm or fault signal when the load is too
heavy (oL), or suddenly drops (UL). They are set up using the L6- parameters. To indicate the underload or overload
condition to an external device, digital outputs should be programmed as shown below.
Note: When overtorque occurs in the application, the drive may stop due to overcurrent (oC) or overload (oL1). To prevent this, an
overload situation should be indicated to the controller before oC or oL1 occur in the drive. Use the torque detection for this
purpose. Use undertorque detection to discover application problems like a torn belt, a pump shutting off, or other similar
trouble.
310
Name
Number of Auto Restart Attempts
Name
Auto Restart Fault Output Operation Selection
Name
Fault Reset Interval Time
Name
Fault Reset Operation Selection
Setting Range
0 to 10 Times
Setting Range
Setting Range
0.5 to 600.0 s
Setting Range
YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
Default
0 Time
Default
0 or 1 0
Default
10.0 s
Default
0 or 1 0