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5.8 L: Protection Functions
n
L3-06: Stall Prevention Level during Run
Sets the current level to trigger Stall Prevention during run. Depending on the setting of parameter L3-23, the level is
automatically reduced in the constant power range (speed beyond base speed).
The Stall Prevention level can be adjusted using an analog input.
on page 146
for details.
No.
L3-06
<1> The upper limit and default values are determined by parameter L8-38, Carrier Frequency Derating Selection.
u
L4: Reference Detection
These parameters set up the Loss of Frequency Reference function.
n
L4-01, L4-02: Speed Agree Detection Level and Detection Width
Parameter L4-01 sets the detection level for the digital output functions Speed agree 1, User-set speed agree 1, Frequency
detection 1, and Frequency detection 2.
Parameter L4-02 sets the hysteresis level for these functions.
No.
L4-01
L4-02
Refer to H2-01 to H2-03: Terminal M1-M2, M3-M4, and MD-ME-MF Function Selection on page
and 5.
n
L4-03, L4-04: Speed Agree Detection Level and Detection Width (+/-)
Parameter L4-03 sets the detection level for the digital output functions Speed agree 2, User-set speed agree 2, Frequency
detection 3, and Frequency detection 4.
Parameter L4-04 sets the hysteresis level for these functions.
No.
L4-03
L4-04
Refer to H2-01 to H2-03: Terminal M1-M2, M3-M4, and MD-ME-MF Function Selection on page
15, and 16.
n
L4-05: Frequency Reference Loss Detection Selection
The drive can detect a loss of an analog frequency reference from input A1, A2, or A3. Frequency reference loss is detected
when the frequency reference drops below 10% of the reference or below 5% of the maximum output frequency within 400
ms.
154
L3-14
Figure 5.43 Deceleration for Current Limit
Name
Stall Prevention Level During Run
Name
Speed Agree Detection Level
Speed Agree Detection Width
Name
Speed Agree Detection Level (+/-)
Speed Agree Detection Width (+/-)
15% of rated current
Frequency reference
Refer to Multi-Function Analog Input Terminal Settings
Setting Range
Setting Range
Setting Range
-400.0 to 400.0 Hz
YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual
<1>
30 to 150
0.0 to 400.0 Hz
0.0 to 20.0 Hz
135, Settings 2, 3, 4,
0.0 to 20.0 Hz
135, Settings 13, 14,
Default
<1>
Default
0.0 Hz
2.0 Hz
Default
0.0 Hz
2.0 Hz
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