L8: Drive Protection

L8-01

(04AD)

3% ERF DB Resistor Protection

Sets the function to enable braking resistor protection with a Yaskawa ERF series braking resistor (3% ED) installed on the heatsink.

0

Disabled

Disables braking resistor protection. Use this setting for dynamic braking options that are not Yaskawa ERF series braking resistors.

1

Enabled

Enables protection for Yaskawa ERF series braking resistors.

Note:

Set L8-01 = 1 and H2-01 to H2-04 = D [MFDO Function Select = Braking Resistor Fault]. Use a sequence to turn OFF power with MFDO.

0

(0, 1)

Details

L8-02

(04AE)

Overheat Alarm Level

Sets the oH detection level in temperature.

Determined by o2-04, C6-01

(50 - 150 °C)

Details

L8-03

(04AF)

Overheat Pre-Alarm Selection

Sets the operation of drives when an oH alarm is detected.

0

Ramp to Stop

 

1

Coast to Stop

 

2

Fast Stop (Use C1-09)

 

3

Alarm Only

 

4

Operate at Reduced Speed (L8-19)

 

3

(0 - 4)

Details

L8-05

(04B1)

Input Phase Loss Protection Sel

Sets the function to enable and disable input phase loss detection.

0

Disabled

 

1

Enabled

 

0

(0, 1)

Details

L8-07

(04B3)

Output Phase Loss Protection Sel

Sets the function to enable and disable output phase loss detection. The drive starts output phase loss detection when the output current decreases to less than 5% of the drive rated current.

0

Disabled

 

1

Fault when one phase is lost

 

2

Fault when two phases are lost

 

0

(0 - 2)

Details

L8-09

(04B5)

Output Ground Fault Detection

Sets the function to enable and disable ground fault protection.

0

Disabled

 

1

Enabled

 

Determined by o2-04

(0, 1)

Details

L8-10

(04B6)

Heatsink Fan Operation Selection

Sets operation of the heatsink cooling fan.

0

During Run, w/ L8-11 Off-Delay

The drive turns on the fan when a Run command is active.

1

Always On

The fan turns on when you supply power to the drive.

2

Temperature-Dependent Fan Ctrl.

The fan turns on when the drive detects that the main circuit is overheating.

0

(0 - 2)

Details

L8-11

(04B7)

Heatsink Fan Off-Delay Time

Sets the length of time that the drive will wait before it stops the cooling fan after it cancels the Run command when L8-10 = 0 [Heatsink Fan Operation Selection = During Run, w/ L8-11 Off-Delay].

60 s

(0 - 300 s)

Details

L8-12

(04B8)

Ambient Temperature Setting

Sets the ambient temperature of the drive installation area.

40 °C

(-10 °C - +50 °C)

Details

L8-15

(04BB)

Drive oL2 @ Low Speed Protection

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.

0

Disabled (No Additional Derate)

 

1

Enabled (Reduced oL2 Level)

 

1

(0, 1)

Details

L8-18

(04BE)

Software Current Limit Selection

Set the software current limit selection function to prevent damage to the main circuit transistor caused by too much current.

0

Disabled

When the output current is at the software current limit value, the drive does not restrict the output voltage.

1

Enabled

When the output current is at the software current limit value, the drive decreases output voltage to decrease output current.

0

(0, 1)

Details

L8-19

(04BF)

Freq Reduction @ oH Pre-Alarm

Sets the ratio at which the drive derates the frequency reference during an oH alarm.

0.8

(0.1 - 0.9)

Details

L8-20

(04C0)

Expert

Control Fault & Step Out Detect

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

 

1

(0 - 2)

Details

L8-27

(04DD)

Overcurrent Detection Gain

Sets the PM motor overcurrent detection level as a percentage of the motor rated current value.

300.0%

(0.0 - 1000.0%)

Details

L8-29

(04DF)

Output Unbalance Detection Sel

Sets the function to detect LF2 [Output Current Imbalance].

0

Disabled

 

1

Enabled

 

1

(0, 1)

Details

L8-31

(04E1)

LF2 Detection Time

Sets the LF2 [Output Current Imbalance] detection time.

3

(1 – 100)

Details

L8-35

(04EC)

Installation Method Selection

Sets the type of drive installation.

0

IP00/IP20/UL Open Type/Ex Heatsink

 

1

Side-by-Side Mounting

 

2

IP20/UL Type 1

 

3

Finless

 

Determined by the drive

(0 - 3)

Details

L8-38

(04EF)

Carrier Frequency Reduction

Sets the carrier frequency reduction function. The drive reduces the carrier frequency when the output current is more than a specified level.

0

Disabled

The drive will not decrease the carrier frequency at high current.

1

Enabled below 6 Hz

The drive decreases the carrier frequency at speeds less than 6 Hz when the current is more than 100% of the drive rated current.

2

Enabled for All Speeds

The drive decreases the carrier frequency at these speeds:

• Output current is a minimum of 100% of the drive rated current and the frequency reference is less than 6 Hz.

• Output current is a minimum of 109% of the drive rated current, the drive is in Normal Duty mode, and the frequency reference is 7 Hz or more.

• Output current is a minimum of 112% of the drive rated current, the drive is in Heavy Duty mode, and the frequency reference is 7 Hz or more.

Determined by A1-02, C6-01 and o2-04

(0 - 2)

Details

L8-40

(04F1)

Carrier Freq Reduction Off-Delay

Sets the length of time until the automatically reduced carrier frequency returns to the condition before the reduction.

Determined by A1-02

(0.00 - 2.00 s)

Details

L8-41

(04F2)

High Current Alarm Selection

Sets the function to cause an HCA [Current Alarm] when the output current is more than 150% of the drive rated current.

0

Disabled

The drive will not detect HCA [High Current Alarm].

1

Enabled

If the output current is more than 150% of the drive rated current, the drive will detect HCA.

0

(0, 1)

Details

L8-51

(0471)

Expert

STPo I Detection Level

Sets the STPo [Motor Step-Out Detected] detection level as a percentage of the motor rated current.

0.0%

(0.0 - 300.0%)

Details

L8-52

(0472)

Expert

STPo Integration Level

Sets the detection level for STPo [Motor Step-Out Detected] related to the ACR integral value.

1.0

(0.1 - 2.0)

Details

L8-53

(0473)

Expert

STPo Integration Time

Sets the length of time until the drive detects STPo after it is more than the value of L8-51 [STPo I Detection Level].

1.0 s

(1.0 - 10.0 s)

Details

L8-54

(0474)

Expert

STPo Id Diff Detection

Sets the Id deviation detection function for STPo [Motor Step-Out Detected].

0

Disabled

 

1

Enabled

 

1

(0, 1)

Details

L8-55

(045F)

Internal DB TransistorProtection

Sets the protection function for the internal braking transistor.

0

Disable

Use this setting when not using a built-in braking transistor, such as when connecting a regenerative converter (D1000), regenerative unit (R1000), or an optional braking unit.

1

Protection Enabled

Protects internal braking transistor when using a braking transistor or optional braking resistors.

1

(0, 1)

Details

L8-56

(047D)

Expert

Stall P @ Accel Activation Time

Sets the length time that the acceleration stall prevention function can continue to operate before the drive detects an STPo [Motor Step-Out Detected].

5000 ms

(100 - 5000 ms)

Details

L8-57

(047E)

Expert

Stall Prevention Retry Counts

Sets the number of times the acceleration stall prevention function can operate until speeds agree before the drive detects an STPo [Motor Step-Out Detected].

10

(1 - 10 times)

Details

L8-90

(0175)

Expert

STPo Detection Level (Low Speed)

Sets the detection level that the control fault must be equal to or more than to cause an STPo [Motor Step-Out Detected].

Determined by A1-02

(0 - 5000 times)

Details

L8-93

(073C)

Expert

Low Speed Pull-out DetectionTime

Sets the length of time the drive will wait to start baseblock after detecting LSo [Low Speed Motor Step-Out].

1.0 s

(0.0 - 10.0 s)

Details

L8-94

(073D)

Expert

Low Speed Pull-out Detect Level

Sets the detection level for LSo [Low Speed Motor Step-Out] as a percentage of E1-04 [Maximum Output Frequency].

3%

(0 - 10%)

Details

L8-95

(077F)

Expert

Low Speed Pull-out Amount

Sets the average count of LSo [Low Speed Motor Step-Out] detections.

10

(1 - 50 times)

Details