YASKAWA V1000 Series Technical Manual page 175

No. Parameter Name
L6-01
Torque Detection Selection 1, 2
L6-04
L6-02 Torque Detection Level 1
L6-03 Torque Detection Time 1
To cancel an overtorque situation, the current level must fall below about 10% of drive rated output torque (or motor rated torque).
To cancel an undertorque situation, the current level must rise above about 10% of drive minimum output torque (or motor minimum torque).
Setting C: Loss of Reference
The Loss of Reference configured digital output will close when the drive has detected a loss of the analog frequency reference. The frequency reference
is considered lost when the voltage level drops 90% in 0.4 seconds. Parameter L4-05 determines the drive's reaction to a loss of reference state in addition
to turning on the Loss of Reference digital output.
The frequency references to which the Loss of Reference function applies are:
• Analog frequency reference input via terminal A1
• Analog frequency reference input via terminal A2
No. Parameter Name
L4-05 Frequency Reference Loss Detection Selection
L4-06 Frequency Reference at Reference Loss
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
0: Disabled
1: OL4 at Speed Agree - Alarm (Overtorque Detection only active during Speed Agree and Operation continues after
detection).
2: OL4 at RUN - Alarm (Overtorque Detection is always active and operation continues after detection).
3: OL4 at Speed Agree - Fault (Overtorque Detection only active during Speed Agree and drive output will shut
down on an OL4 fault).
4: OL4 at RUN - Fault (Overtorque Detection is always active and drive output will shut down on an OL4 fault).
5: UL4 at Speed Agree - Alarm (Undertorque Detection is only active during Speed Agree and operation continues
after detection).
6: UL4 at RUN - Alarm (Undertorque Detection is always active and operation continues after detection).
7: UL4 at Speed Agree - Fault (Undertorque Detection only active during Speed Agree and drive output will shut
down on an OL4 fault).
8: UL4 at RUN - Fault (Undertorque Detection is always active and drive output will shut down on an OL4 fault).
motor current (output torque)
L6-02 or L6-05
L6-03
Torque Detection 1, N.O.
or
or
L6-06
Torque Detection 2, N.O.
Figure 5.55 Overtorque Detection Timing Diagram
motor current (output torque)
L6-02 or L6-05
Torque Detection 1, N.O. L6-03
or or
Torque Detection 2, N.O.
L6-06
Figure 5.56 Undertorque Detection Timing Diagram
0: Stop - Drive will stop.
1: Run at the value saved to L4-06
Setting Range
0 to 300
0.0 to 10.0
*
L6-03
or
L6-06
ON
*
L6-03
or
L6-06
ON
Setting Range
0.0 to 100.0
5.7 H: Terminal Functions
Default
0
150%
0.1 s
*
ON
ON
Default
0
80.0%
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