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5.8 L: Protection Functions
n
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 to L5-01.
Setting 1: Count Restart Attempts
The drive will attempt to restart using the time interval set to parameter L5-04. A record is kept of the number of attempts to
restart to the drive, regardless of whether those attempts were successful. When the number of attempted restarts exceeds the
value set to L5-01, the drive stops attempting to restart.
u
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). These functions are set up using the L6-oo parameters. Program the digital outputs as shown
below to indicate the underload or overload condition to an external device:
Note:
When overtorque occurs in the application, the drive may stop due to overcurrent (oC) or overload (oL1). To prevent the drive from stopping,
use torque detection to indicate an overload situation to the controller before oC or oL1 occur. Use undertorque detection to discover
application problems like a torn belt, a pump shutting off, or other similar trouble.
H2-01, H2-02, H2-03
Setting
B
17
Figure 5.47
and
Figure 5.48
Note:
1. The torque detection function uses a hysteresis of 10% of the drive rated output current and motor rated torque.
2. The level is set as a percentage of the drive rated output current.
n
L6-01: Torque Detection Selection 1
The torque detection function is triggered when the current or torque exceed the levels set to L6-02 for longer than the time
set to L6-03. L6-01 selects the conditions for detection and the operation that follows.
158
Name
Fault Reset Operation Selection
Torque detection 1, N.O. (output closes when overload or underload is detected)
Torque detection 1, N.C. (output opens when overload or underload is detected)
illustrate the functions of overtorque and undertorque detection.
Motor current / torque
L6-02
Torque detection 1 (NO)
or
Torque detection 2 (NO)
Figure 5.47 Overtorque Detection Operation
Motor current / torque
L6-02
Torque detection 1 (NO)
or
Torque detection 2 (NO)
Figure 5.48 Undertorque Detection Operation
Description
10 % hysteresis
L6-03
ON
10 % hysteresis
L6-03
ON
YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual
Setting Range
0, 1
10 % hysteresis
L6-03
ON
L6-03
ON
Default
1
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