Chapter 6 Troubleshooting                                                                                            IS620P User Manual                                                 
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6.2 During Running
6.2.1 Fault and Alarm Code List
 
■
Fault and Alarm Grading
The faults and alarms are graded into the following four levels based on the degree of severity: 
 
•
No.1 non-resettable fault
 
•
No.1 resettable fault
 
•
No.2 resettable fault
 
•
No.3 resettable alarm
"Resettable" means that the operating panel stops display of the fault/alarm once the reset 
signal is input. To reset a fault/alarm, set H0D-01 = 1 (fault reset enabled) or set the DI terminal 
allocated with the function FunIN.2 (ALM-RST) to ON.
 
•
To reset No.1 fault and No.2 fault, cut off the servo enabled signal (set S-ON to OFF) and 
then set H0D-01 = 1 or set the DI terminal allocated with the function FunIN.2 (ALM-RST) 
to ON.
 
•
To reset No.3 alarm, set H0D-01 = 1 or set the DI terminal allocated with the function 
FunIN.2 (ALM-RST) to ON.
 
•
Some faults/alarms can only be reset after the cause is removed by modifying related parameter 
setting. The parameter modication will not become effective until you re-connect the control 
power (L1C, L2C) or stop the servo drive. In the scenario where you need to stop the servo drive, 
set the servo enabled signal (S-ON) to OFF. Once the modication becomes effective, the servo 
drive can run normally.
 
•
When faults/alarms (Er.610, Er.620, Er.630, Er.650, Er.690, Er.909, Er.922) occur, stop the drive 
and remove the cause, wait for 30 minutes and then start running the drive again.
 ▐ Related function parameter
Function 
Code
Parameter 
Name 
Setting Range Function Description Property
Effective 
Time
Default
H0D 01 Fault reset
0: No operation
1: Enabled
When a resettable fault/
alarm occurs, set H0D-01 to 
1 to reset it. When resetting 
is completed, immediately 
set H0D-01 to 0.
At stop Immediate 0
 ▐ Related function
No. Function Symbol Function Name Description
FunIN.2 ALM-RST
Fault/Alarm reset 
signal
When this function is used, the logic of the 
corresponding terminal is rising/falling edge 
effective rather than high/low level effective.
Ineffective: Not reset fault/alarm
Effective: Reset fault/alarm