Panasonic MDDDT5540 User Manual

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Protective  Functions

What  are  the  Protective  Functions?

     The amplifier has various protective functions. When one of the protections is activated, the motor

trips according to the timing chart shown in "Error Handling" in Appendix, and the Servo Alarm

Output (ALM) is turned off.

    Actions to be taken after trip events

•  After a trip event, the status LED (STATUS) on the front panel will be turned in red, and the alarm

code LED display (ALM CODE) will start flashing. No servo-ON occurs.

For meaning of flashing of alarm code LED, see page 49.

•  Any trip status can be cleared by keeping A-CLR (Alarm Clear Input) on for at least 120 ms.

•  The overload protection can be cleared by A-CLR at least 10 seconds after the occurrence of the

event. If the main power supply of amplifier turns off, the time limiting operation is cleared.

•  The alarms mentioned above can also be cleared by using PANATERM

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Protections  marked  with  *  cannot  be  cleared  with  A-CLR  (Alarm  Clear  Input).  They  should  be

cleared  by  turning  the  power  off,  removing  the  causes,  and  then  turning  the  power  on  again.

Alarms  of  undervoltage  protection  (Alarm  Code  No.  11),  EEPROM  parameter  error  protection

(Alarm  Code  No.  36),  EEPROM  check  code  error  protection  (Alarm  Code  No.  37)  and  drive

inhibit  input  protection  (Alarm  Code  No.  38)  are  not  stored  in  the  Alarm  History.