10 7 AL10     Undervoltage           1)Power supply voltage is low.                                                            
                                     2)Power supply voltage dropped. MR-J2S-B:160V or less                                     
                                     3)Power supply voltage dropped. MR-J2S-B1:83V or less                                     
                                     4)There was an instantaneous control power failure of 60ms or longer.                     
                                     5)Shortage of power supply capacity caused the power supply voltage to drop at start, etc.
                                     6)Power was restored after the bus voltage had dropped to 200VDC.                         
                                     7)Faulty parts in the servo amplifier                                                     
12 1 AL12     Memory error 1         1)RAM, memory fault                                                                       
13 1 AL13     Clock error            1)Printed board fault                                                                     
15 1 AL15     Memory error 2         1)EEP-ROM fault                                                                           
16 3 AL16     Encoder error 1        1)CN2 connector disconnected.                                                             
                                     2)Encoder fault                                                                           
                                     3)Encoder cable faulty                                                                    
17 1 AL17     Board error            1)CPU/parts fault                                                                         
19 1 AL19     Memory error 3         1)ROM memory fault                                                                        
1A 1 AL1A     Motor comb. error      1)Wrong combination of servo amplifier and servo motor connected.                         
1B 1 AL1B     Converter RD off       1)Servo-on occurred with the ready signal (RD) of the converter off.                      
20 2 AL20     Encoder error 2        1)Encoder connector (CN2) disconnected.                                                   
                                     2)Encoder cable faulty                                                                    
24 4 AL24     Main circuit error     1)Power input wires and servo motor output wires are in contact at main circuit terminal  
                                       block(TE1).                                                                             
                                     2)Sheathes of servo motor power cables deteriorated, resulting in ground fault.           
                                     3)Main circuit of servo amplifier failed.                                                 
25 4 AL25     ABS position erase     1)Reduced voltage of super capacitor in encoder                                           
                                     2)Battery voltage low                                                                     
                                     3)Battery cable or battery is faulty.                                                     
                                     4)Super capacitor of the absolute position encoder is not charged                         
30 7 AL30     Regenerative error     1)Wrong setting of parameter No. 2                                                        
                                     2)Built-in regenerative brake resistor or regenerative brake option is not connected.     
                                     3)High-duty operation or continuous regenerative operation caused the permissible         
                                       regenerative power of the regenerative brake option to be exceeded.                     
                                     4)Power supply voltage is abnormal. MR-J2S-B:260V or more MR-J2S-B1:135V or more          
                                     5)Regenerative transistor faulty.                                                         
                                     6)Built-in regenerative brake resistor or regenerative brake option faulty.               
31 3 AL31     Overspeed              1)Small acceleration/deceleration time constant caused overshoot to be large.             
                                     2)Servo system is instable to cause overshoot.                                            
                                     3)Encoder faulty.                                                                         
32 4 AL32     Overcurrent            1)Short occurred in servo amplifier output phases U, V and W.                             
                                     2)Transistor of the servo amplifier faulty.                                               
                                     3)Ground fault occurred in servo amplifier output phases U, V and W.                      
                                     4)External noise caused the overcurrent detection circuit to misoperate.                  
33 7 AL33     Overvoltage            1)Lead of built-in regenerative brake resistor or regenerative brake option is open or    
                                       disconnected.                                                                           
                                     2)Regenerative transistor faulty.                                                         
                                     3)Wire breakage of built-in regenerative brake resistor or regenerative brake option      
                                     4)Capacity of built-in regenerative brake resistor or regenerative brake option is        
                                       insufficient.                                                                           
                                     5)Power supply voltage high.                                                              
34 5 AL34     CRC error              1)Bus cable disconnected.                                                                 
                                     2)Bus cable fault                                                                         
                                     3)Noise entere bus cable.                                                                 
                                     4)Termination connector disconnected.                                                     
                                     5)The same No. exists in the servo amplifier side axis setting.                           
35 3 AL35     Command frequency err. 1)Command given is greater than the maximum speed of the servo motor.                     
                                     2)Noise entered bus cable.                                                                
                                     3)Servo system controller failure                                                         
36 4 AL36     Transfer error         1)Bus cable is disconnected.                                                              
                                     2)Bus cable fault.                                                                        
                                     3)Printed board is faulty.                                                                
                                     4)Terimination connector disconnected                                                     
37 3 AL37     Parameter error        1)Servo amplifier fault caused the parameter setting to be rewritten.                     
                                     2)Please contact Mitsubishi if the error parameter is unknown.                            
                                       Parameter data setting is incorrect. Parameter No.                                      
45 3 AL45     Main crct dvc overheat 1)Servo amplifier faulty.                                                                 
                                     2)The power supply was turned on and off continuously by overloaded status.               
                                     3)Air cooling fan of servo amplifier stops.                                               
46 3 AL46     Servo motor overheat   1)Ambient temperature of servo motor is over degrees C.                                   
                                     2)Servo motor is overloaded.                                                              
                                     3)Thermal protector in encoder is faulty.                                                 
50 6 AL50     Overload 1             1)Servo amplifier is used in excess of its continuous output current.                     
                                     2)Servo system is instable and hunting.                                                   
                                     3)Machine struck something.                                                               
                                     4)Wrong connection of servo motor. Servo amplifier's output terminals U, V, W do not match
                                       servo motor's input terminals U, V, W.                                                  
                                     5)Encoder faulty.                                                                         
51 5 AL51     Overload 2             1)Machine struck something.                                                               
                                     2)Wrong connection of servo motor. Servo amplifier's output terminals U, V, W do not match
                                       servo motor's input terminals U, V, W.                                                  
                                     3)Servo system is instable and hunting.                                                   
                                     4)Encoder faulty.                                                                         
52 9 AL52     Error excessive        1)Acceleration/deceleration time constant is too small.                                   
                                     2)Torque limit value is too small.                                                        
                                     3)Motor cannot be started due to torque shortage caused by power supply voltage drop.     
                                     4)Position control gain 1 (parameter No.13) value is small.                               
                                     5)Servo motor shaft was rotated by external force.                                        
                                     6)Machine struck something.                                                               
                                     7)Encoder faulty                                                                          
                                     8)Wrong connection of servo motor. Servo amplifier's output terminals U, V, W do not match
                                       servo motor's input terminals U, V, W.                                                  
8E 2 AL8E     Serial com. error      1)Communication cable fault                                                               
                                     2)Communication device (e.g. personal computer) faulty                                    
92 2 AL92     Open battery cable wrg.1)Battery cable is open.                                                                  
                                     2)Battery voltage dropped to 2.8V or less.                                                
96 3 AL96     Home posi. setting wrg.1)Droop pulses remaining are greater than the in-position range setting.                  
                                     2)Home position return was executed during operation command                              
                                     3)Creep speed high.                                                                       
9F 1 AL9F     Battery warning        1)Battery voltage fell to 3.2V or less.                                                   
E0 2 ALE0     Excessive reg. wrg.    1)Regenerative power increased to 85% or more of permissible regenerative power of        
                                       built-in regenerative brake resistor or regenerative brake option.                      
E1 1 ALE1     Overload warning       1)Load increased to 85% or more of overload alarm 1 or 2 occurrence level.                
E3 2 ALE3     ABS posi.counter wrg.  1)Noise entered the encoder.                                                              
                                     2)Encoder faulty.                                                                         
E4 1 ALE4     Parameter warning      1)Parameter value set from servo system controller is outside setting range               
E6 1 ALE6     Servo forced stop wrg. 1)External forced stop was made valid.                                                    
E7 1 ALE7     Cont. emg. stop wrg.   1)Emergency stop signal was entered into the servo system controller.                     
E9 1 ALE9     Main circuit off wrg.  1)Servo was switched on with main circuit power off.                                      
EE 1 ALEE     SCCNET error warning   1)The servo system controller connected is not SSCNET-compatible.                         
