5.7 L: Protection Functions u L8: Hardware Protection n 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). 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. n L8-05: Input Phase Loss Protection Selection Enables or disables the input phase loss detection. 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. n L8-10: Heatsink Cooling Fan Operation Selection Selects the heatsink cooling fan operation. 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.
n L8-12: Ambient Temperature Setting Parameter Details 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. 5 n 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. Setting 0: Disabled The drive may trip on an oC fault if the load is too heavy or the acceleration is too short. SIEP C710606 33A OYMC AC Drive – J1000 User Manual 109 No. Name Setting Range Default L8-01 Internal Braking Resistor Protection 0 or 1 0 No. Name Setting Range Default L8-05 Input Phase Loss Detection Selection 0 or 1 1 No. Name Setting Range Default L8-10 Fan Operation Selection 0 or 1 0 No. Name Setting Range Default L8-12 Ambient Temperature Setting -10 to +50 °C 30 °C No. Name Setting Range Default L8-18 Software Current Limit Selection 0 or 1 1