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L8: Hardware Protection
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L8-01: Internal Dynamic Braking Resistor Protection Selection (ERF type)
This parameter selects the dynamic braking resistor protection when using an optional heatsink mounted braking resistor
(ERF type, 3% ED).
No.
Name
Setting Range
Default
L8-01
Internal Braking Resistor Protection
0 or 1
0
Setting 0: Disabled
Disables the braking resistor protection. Use this setting for any braking option other than the OYMC ERF Type resistor.
Setting 1: Enabled
Enables the protection for ERF type resistors.
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L8-05: Input Phase Loss Protection Selection
Enables or disables the input phase loss detection.
No.
Name
Setting Range
Default
L8-05
Input Phase Loss Detection Selection
0 or 1
1
Setting 0: Disabled
Setting 1: Enabled
Enables the input phase loss detection. As detection is performed by measuring the DC bus ripple, a phase loss fault (PF)
can also be triggered by power supply voltage imbalance or main circuit capacitor deterioration. Detection is disabled
when:
• The drive is decelerating.
• No Run command is active.
• Output current is less than or equal to 30% of the drive rated current.
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L8-10: Heatsink Cooling Fan Operation Selection
Selects the heatsink cooling fan operation.
No.
Name
Setting Range
Default
L8-10
Fan Operation Selection
0 or 1
0
Setting 0: Run with Timer
The fan is switched on when a Run command is active. It is switched off 60 s after the Run command has been released.
Using this setting extends the fan lifetime.
Setting 1: Run always
The fan runs whenever power is supplied to the drive.
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L8-12: Ambient Temperature Setting
If the temperature where the drive is mounted is above the specified values, the drive rated current must be reduced for
optimal performance life. By setting the ambient temperature to parameter L8-12 and adjusting the installation method
setting in L8-35, the drive rating automatically adapts to safe values.
No.
Name
Setting Range
Default
L8-12
Ambient Temperature Setting
-10 to +50 °C
30 °C
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L8-18: Software CLA Selection
The Software Current Limit (CLA) is a drive protection function that prevents output transistor failures caused by high
current. Parameter L8-18 enables or disables this function.
Note:
This setting should not be changed unless absolutely necessary. For proper drive protection and operation leave the Software CLA function
enabled.
No.
Name
Setting Range
Default
L8-18
Software Current Limit Selection
0 or 1
1
Setting 0: Disabled
The drive may trip on an oC fault if the load is too heavy or the acceleration is too short.
5.7 L: Protection Functions
SIEP C710606 33A OYMC AC Drive – J1000 User Manual
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Parameter Details