YASKAWA GA700 Series Technical Manual page 556

11.11 L: Protection Functions
No.
Name
(Hex.)
L8-15 Drive oL2 @ Low Speed
Protection
(04BB)
L8-18 Software Current Limit
Selection
(04BE)
L8-19 Freq Reduction @ oH
Pre-Alarm
(04BF)
L8-20 Control Fault & Step Out
Detect
(04C0)
Expert
L8-27 Overcurrent Detection
Gain
(04DD)
L8-29 Output Unbalance
Detection Sel
(04DF)
L8-31 LF2 Detection Time
(04E1)
L8-32 Cooling Fan Failure
Selection
(04E2)
L8-35 Installation Method
Selection
(04EC)
L8-38 Carrier Frequency
Reduction
(04EF)
L8-40 Carrier Freq Reduction
Off-Delay
(04F1)
L8-41 High Current Alarm
Selection
(04F2)
556
Description
V/f CL-V/f OLV CLV AOLV
Sets the function to decrease the drive overload level at which the drive will trigger oL2
[Drive Overload] during low speed operation (6 Hz or slower) to prevent damage to the
main circuit transistors.
Note:
Contact Yaskawa or your nearest sales representative before disabling this function
at low speeds. If you frequently operate drives with high output current in low
speed ranges, it can cause heat stress and decrease the life span of drive IGBTs.
0 : Disabled (No Additional Derate)
1 : Enabled (Reduced oL2 Level)
V/f CL-V/f OLV CLV AOLV
Set the software current limit selection function to prevent damage to the main circuit
transistor caused by too much current.
0 : Disabled
1 : Enabled
V/f CL-V/f OLV CLV AOLV
Sets the ratio at which the drive derates the frequency reference during an oH alarm.
V/f CL-V/f OLV CLV AOLV
Sets operation after the drive detects a CF fault when A1-02 = 4 [Control Method
Selection = Advanced Open Loop Vector].
0 : Disabled
1 : CF/STPo Detection Enabled
2 : CF ALM/Stop
V/f CL-V/f OLV CLV AOLV
Sets the PM motor overcurrent detection level as a percentage of the motor rated current
value.
Note:
Parameter A1-02 [Control Method Selection] selects which parameter is the motor
rated current.
• A1-02 ≠ 8 [EZOLV]: E5-03 [PM Motor Rated Current (FLA)]
• A1-02 = 8: E9-06 [Motor Rated Current (FLA)]
V/f CL-V/f OLV CLV AOLV
Sets the function to detect LF2 [Output Current Imbalance].
0 : Disabled
1 : Enabled
V/f CL-V/f OLV CLV AOLV
Sets the LF2 [Output Current Imbalance] detection time.
V/f CL-V/f OLV CLV AOLV
Sets operation when the drive detects FAn [Internal Fan Fault].
0 : Ramp to Stop
1 : Coast to Stop
2 : Fast Stop (Use C1-09)
3 : Alarm Only
4 : Operate at Reduced Speed (L8-19)
V/f CL-V/f OLV CLV AOLV
Sets the type of drive installation.
0 : IP20/UL Open Type/Ex Heatsink
1 : Side-by-Side Mounting
2 : IP20/UL Type 1
3 : Finless
V/f CL-V/f OLV CLV AOLV
Sets the carrier frequency reduction function. The drive reduces the carrier frequency
when the output current is more than a specified level.
0 : Disabled
1 : Enabled below 6 Hz
2 : Enabled for All Speeds
V/f CL-V/f OLV CLV AOLV
Sets the length of time until the automatically reduced carrier frequency returns to the
condition before the reduction.
V/f CL-V/f OLV CLV AOLV
Sets the function to cause an HCA [Current Alarm] when the output current is more
than 150% of the drive rated current.
0 : Disabled
1 : Enabled
OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
YASKAWA SIEPC71061705H GA700 Series Technical Manual
Default
Ref.
(Range)
1 912
(0, 1)
0 912
(0, 1)
0.8 912
(0.1 - 0.9)
1 913
(0 - 2)
300.0% 913
(0.0 - 1000.0%)
1 913
(0, 1)
3 913
(1 – 100)
1 914
(0 - 4)
Determined by the drive 444
(0 - 3)
Determined by A1-02, 915
C6-01 and o2-04
(0 - 2)
Determined by A1-02 915
(0.00 - 2.00 s)
0 915
(0, 1)