YASKAWA A1000 Technical Manual page 500

B.3 Parameter Table
No. (Addr.) Name
L8-15 oL2 Characteristics Selection at
(4BBH) Low Speeds
L8-18
Software Current Limit Selection
(4BEH)
L8-19 Frequency Reduction Rate during
(4BFH) Overheat Pre-Alarm
L8-27
Overcurrent Detection Gain
(4DDH)
L8-29 Current Unbalance Detection
(4DFH) (LF2)
L8-32
Cooling Fan Failure Selection
(4E2H)
L8-35
Installation Method Selection
(4ECH)
L8-38 Carrier Frequency Reduction
(4EFH) Selection
Carrier Frequency Reduction 
L8-40
(4F1H) Off-Delay Time
L8-41
High Current Alarm Selection
(4F2H)
L8-55 Internal Braking Transistor
(45FH) Protection
L8-78 Power Unit Output Phase Loss
(2CCH) Protection
L8-93
LSo Detection Time at Low Speed
(73CH)
L8-94
LSo Detection Level at Low Speed
(73DH)
500
All Modes
0: No oL2 level reduction below 6 Hz.
1: oL2 level is reduced linearly below 6 Hz. It is halved at 0 Hz.
V/f V/f w/PG
OLV/PM AOLV/PM
0: Disabled
1: Enabled
All Modes
Specifies the frequency reference reduction gain at overheat pre-alarm when L8-03 = 4.
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the gain for overcurrent detection as a percentage of the motor rated current. Overcurrent is
detected using the drive's overcurrent level or the value set to L8-27, whichever is lower.
V/f V/f w/PG
OLV/PM AOLV/PM
For models CIMR-A2A0004 to 2A0415, 4A0002 to 4A0630
0: Disabled
1: Enabled (current and voltage detection)
2: Enabled (current detection)
3: Enabled (voltage detection)
For models CIMR-A4A0930 and 4A1200
0: Disabled
1: Enabled (current detection)
All Modes
Determines the action the drive should take when a fault occurs with the internal cooling fan.
0: Ramp to stop
1: Coast to stop
2: Fast Stop (decelerate to stop using the deceleration time in C1-09)
3: Alarm only ("FAn" will flash)
4: Continue operation at reduced speed as set in L8-19.
All Modes
0: IP00 enclosure drive
1: Side-by-Side mounting
2: IP20/NEMA 1, UL Type 1 enclosure
3: Finless model drive or external heatsink installation
V/f V/f w/PG
OLV/PM AOLV/PM
0: Disabled
1: Enabled below 6 Hz
2: Enabled for the entire speed range
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the time that the drive continues running with reduced carrier frequency after the carrier
reduction condition is gone. Setting 0.00 s disables the carrier frequency reduction time.
All Modes
0: Disabled
1: Enabled. An alarm is triggered at output currents above 150% of the drives rated current.
All Modes
0: Disabled. L8-55 should be disabled when using a regen converter or an optional braking unit.
1: Protection enabled.
Note: This parameter is not available in models CIMR-A4A0930 and 4A1200.
All Modes
Enables motor protection if output phase loss occurs.
0: Disabled
1: Enabled
Note: This parameter is available in models CIMR-A4A0930 and 4A1200.
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the amount of time until baseblock is executed once LSo has been detected at low speed.
V/f V/f w/PG
OLV/PM AOLV/PM
Determines the detection level of LSo at low speed.
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Description
OLV
CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
Setting Page
Default: 1
Min: 0 298
Max: 1
Default: 0
Min: 0 298
Max: 1
Default: 0.8
Min: 0.1 296
Max: 0.9
Default: 300.0%
Min: 0.0% 298
Max: 400.0%
For models
CIMR-A2A0004 to
2A0415, 4A0002 to
4A0630
Default: 1
Min: 0
Max: 3
299
For models
CIMR-A4A0930 and
4A1200
Default: 1
Min: 0
Max: 1
Default: 1
Min.: 0 299
Max.: 4
Default:
<6>
Min: 0 299
Max: 3

Default:
<16>
Min: 0 300
Max: 2

Default:
<10>
Min: 0.00 s 300
Max: 2.00 s
Default: 0
Min: 0 300
Max: 1
Default: 1
Min: 0 300
Max: 1
Default: 1
Min: 0 301
Max: 1
Default: 1.0 s
Min: 0.0 s 301
Max: 10.0 s
Default: 3%
Min: 0% 301
Max: 10%