Technical Manual for EA350 Analog Pulse Type Servo Driver V101 Chapter 11 Warning, alarm and handling 11.1 Alarm diagnosis and handling measures When the servo driver becomes subject to an alarm, the digital manipulator will display for the alarm; and the motor will automatically brake or brake at zero speed (according to setting of P0-08; but zero-speed braking only applies to a second-level alarm). The driver will record information on the latest four alarms, which can be viewed via group d1. Alarm display and its handling measures are provided below: : Output short circuit : Hardware over-current 1 : Hardware over-current 2 : Software over-current : Storage abnormality alarm :
System parameter abnormal : Zero drift anomaly : Encoder abnormality 1 : Encoder abnormality 2 241 Reason for alarm Inspection Handling method Motor wiring error Check the wiring phase between the motor and the driver Reconnect the wire according to the instructions Control parameter setting abnormal Check whether the setting is far greater than the default value Restore the default value and make corrections step by step Command changes too sharp Check if the control input command changes too wildly Correct the input command change rate or enable the filtering function Driver output short circuit 1:
Check the wiring status between the motor and the driver or check the conductor against short circuit 2: Check if the motor is damaged 1: Rule out short circuit, and prevent exposure of the metal conductor 2:
Replace the damaged motor The external braking resistor has too small resistance or is short- circuited Check if the external braking resistor conforms to the specification Use a braking resistor conforming to the instructions, and properly set parameters P8-10, P8-11 and P8-13 Driver hardware failure Alarm still remains after all problems above are eliminated Send it to the distributor or manufacturer for repair Reason for alarm Inspection Handling method Abnormal write of parameter data Cut off the power and restart; check whether the alarm still occurs Replace the driver Highly frequent storage Check the upper computer program to see whether frequent write operations are performed to the EEPROM of the driver Correct the upper computer program, and use the RAM address for parameters requiring frequent write operations.
The address direction can be adjusted through group P7. Reason for alarm Inspection Handling method Parameters set have conflicts Check parameters set before the alarm 1: When a DO terminal is set to BK function, instantaneous outage holding function is enabled (by setting P8-18 bit1 as 1). 2: When homing method is selected as 31 or 32, the locked- rotor protection function (P8-15≠0) is not enabled for the motor. Or, though it’s enabled, the parameters related to locked-rotor protection (P8-15≥Pb-04 or P8-14≥Pb-14) are set improperly.
Correct wrong parameters Reason for alarm Inspection Handling method An abnormal value i detected by the outpu current detection circui during power-on self inspection. s 1: Cut off the power and restart; check whether the alarm t still occurs t 2: In non-enabled state, set AF04 as 2 and perform zero - drift self-learning. Upon zero drift self-learning, check if the d0-67 combination of the units place and the tens place, or the hundred’s place and the thousand’s place, is greater than 50. If yes, return the product to the distributor or the manufacturer for repairing.
Reason for alarm Inspection Handling method Encoder released Check the CN5 and encoder connector of the driver Reinstallation Encoder wiring error Check is the encoder is wired following the recommended route in the instructions Correct wiring Poor encoder wiring Check whether the CN5 and encoder of the driver are properly connected and if the shielding layer is sound Reconnect the wire The encoder is damaged. After the wiring problem is eliminated, this alarm still occurs Replace the motor Reason for alarm Inspection Handling method