Setting 7: UL3 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 fault.
Setting 8: UL3 at Run (Fault)
Undertorque detection works as long as a Run command is active. The operation stops and triggers a UL3 fault.
n
L6-02: Torque Detection Level 1
Sets the detection levels for torque detection function 1 as a percentage of the drive rated output current.
No.
Name
Setting Range
Default
L6-02
Torque Detection Level 1
0 to 300%
15%
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.
n
L6-03: Torque Detection Time 1
Determines the time required to trigger an alarm or fault after exceeding the level in L6-02.
No.
Name
Setting Range
Default
L6-03
Torque Detection Time 1
0.0 to 10.0 s
10.0 s
n
L6-13: Motor Underload Protection Selection
Sets Motor Underload Protection (UL6) based on motor load and determines whether the level of L6-02 refers to fbase or
fmax.
Selects the operation of underload detection UL6. Underload is detected when the output current falls below the underload
detection level defined by L6-14 and L2-02
<1>
.
<1> Details on this function can be found in the standard Z1000 Programming Manual (SIEPC71061645) at
www.yaskawa.com.
No.
Name
Setting Range
Default
L6-13
Motor Underload Protection Selection
0, 1
0
Setting 0: Fbase Motor Load Enabled
Setting 1: Fmax Base Motor Load Enabled
UL Detection Level
L6-02
(0 to 300%)
0
Fmin
Fbase
1/f
Fmax
Output
Frequency
L6-14
Motor Underload
Protection at Fmin
Figure 5.50 Motor Underload Protection
n
L6-14: Motor Underload Protection Level at Minimum Frequency
Sets the UL6 detection level at minimum frequency by percentage of drive rated current
5.9 L: Protection Functions
178
YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual
