Setting 7: UL3, UL4 at Speed Agree (Fault)
Undertorque detection is active only when the output speed is equal to the frequency reference, i.e., no detection during
acceleration and deceleration. The operation stops and triggers a UL3/UL4 fault.
Setting 8: UL3, UL4 at Run (Fault)
Undertorque detection works as long as a Run command is active. The operation stops and triggers a UL3/UL4 fault.
n
L6-02, L6-05: Torque Detection Level 1, 2
These parameters set the detection levels for torque detection functions 1 and 2. In V/f and OLV/PM control modes, these
levels are set as a percentage of the drive rated output current. In vector control modes, these levels are set as a percentage of
the motor rated torque.
When Mechanical Weakening detection is enabled (L6-08
≠
0), the level for L6-02 is set as a percentage of the drive rated
output current in all control modes.
No.
Name
Setting Range
Default
L6-02
Torque Detection Level 1
0 to 300%
150%
L6-05
Torque Detection Level 2
0 to 300%
150%
Note:
The torque detection level 1 (L6-02) can also be supplied by an analog input terminal set to H3-
oo
= 7. Here, the analog value has priority
and the setting in L6-02 is disregarded. Torque detection level 2 (L6-05) cannot be set by an analog input.
n
L6-03, L6-06: Torque Detection Time 1, 2
These parameters determine the time required to trigger an alarm or fault after exceeding the levels in L6-02 and L6-05.
No.
Name
Setting Range
Default
L6-03
Torque Detection Time 1
0.0 to 10.0 s
10.0 s
L6-06
Torque Detection Time 2
0.0 to 10.0 s
0.1 s
n
Mechanical Weakening Detection
This function detects the mechanical weakening of a machine that leads to overtorque or undertorque situations after a set
machine operation time has elapsed.
The function is activated in the drive when the cumulative operation counter U4-01 exceeds the time set to parameter L6-11.
Mechanical Weakening Detection uses the torque detection 1 settings (L6-01, L6-02, L6-03) and triggers an oL5 or UL5 fault
when overtorque or undertorque occurs in the speed range determined by parameter L6-08 and L6-09. The oL5 or UL5
operation is set by parameter L6-08.
Set H2-
oo
to 22 to output a signal for Mechanical Weakening Detection.
n
L6-08: Mechanical Weakening Detection Operation
Sets the speed range to detect mechanical weakening and the action to take when mechanical weakening is detected.
No.
Name
Setting Range
Default
L6-08
Mechanical Weakening Detection Operation
0 to 8
0
Setting 0: Disabled
Setting 1: Continue Running if the Speed Is Greater than L6-09 (Signed) (Alarm)
Detection when the speed is above L6-09 (signed). Operation continues and triggers an oL5 alarm after detection.
Setting 2: Continue Running if the Speed Is Greater than L6-09 (Alarm)
Detection when the speed is above L6-09 (unsigned). Operation continues and triggers an oL5 alarm after detection.
Setting 3: Stop when Motor Speed Is Greater than L6-09 (Signed)
Detection when the speed is above L6-09 (signed). Operation stops and triggers an oL5 fault after detection.
Setting 4: Stop when Motor Speed Is Greater than L6-09
Detection when the speed is above L6-09 (unsigned). Operation stops and triggers an oL5 fault after detection.
Setting 5: Continue Running if the Speed Is Less than L6-09 (Signed) (Alarm)
Detection when the speed is below L6-09 (signed). Operation continues and triggers a UL5 alarm after detection.
5.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
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5
Parameter Details
Summary of Contents for U1000 iQpump Drive
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