Technical Manual for EA350 Analog Pulse Type Servo Driver V101 Parameter functions: Set the derating of a braking resistor. It cannot be changed when a built-in braking resistor is used. This parameter is intended to prevent damage of the braking resistor due to overheating. When an external braking resistor is used, if the resistor can withstand the power set by P8-11 for a long time, then the parameter can be set to 100; otherwise the setting shall be derated based on the actual conditions of the braking resistor. Parameter functions: Set the minimum output torque for motor locked rotor judgment.
When rotor locking occurs during running of the motor due to mechanical reasons, the motor will continue output according to settings of P0-06 and P0-07 as the motor speed fails to reach the command value. As the motor does not rotate, this will cause heating of the driver and the motor, and further result in damage. The driver is provided with a motor locked rotor protection function to solve this problem. Logic for locked-rotor judgment:
199 P8-13 Braking resistor derating percentage Initial value 40 Communication address 080DH Unit % Time of taking effect Taking effect upon power-on again Setting range 1~100 Data size 16bit Control mode P S T P8-14 Minimum load for judgment of motor locked-rotor Initial value 150.0 Communication address 080EH Unit % Time of taking effect With immediate effect Setting range 10.0~250.0 Data size 16bit Control mode P S T