u
Fault History Contents
The table below shows the fault codes that can be read out by MEMOBUS/Modbus commands from the U2-oo monitor
parameters.
Note: Uv1 fault is not saved to the fault history.
Table C.4
Fault History Register Contents
Fault Code Fault Name Fault Code Fault Name
0002H Undervoltage (Uv1) 0042H External Fault 1, input terminal S1 (EF1)
0004H Soft Charge Circuit Fault (Uv3) 0043H External Fault 2, input terminal S2 (EF2)
0007H Overcurrent (oC) 0046H Current Offset Fault (CoF)
0008H Overvoltage (ov) 0083H A/D Conversion Error (CPF02)
000AH Heatsink Overheat (oH1) 0087H
Drive specification mismatch during Terminal Board or
Control Board replacement (CPF06)
000BH Motor Overload (oL1) 0089H EEPROM Serial Communication Fault (CPF08)
000CH Drive Overload (oL2) 008CH RAM fault (CPF11)
000DH Overtorque Detection 1 (oL3) 008DH Flash memory circuit exception (CPF12)
0010H Braking Resistor Overheat (rH) 008FH Control Circuit Fault (CPF14)
0011H External Fault at input terminal S3 (EF3) 0092H Timing Fault (CPF17)
0012H External Fault at input terminal S4 (EF4) 0093H Control Circuit Fault (CPF18)
0013H External Fault at input terminal S5 (EF5) 0095H Hardware fault at power up (CPF20)
001BH Input Phase Loss (PF) 0096H Hardware fault at communication start up (CPF21)
001CH Output Phase Loss (LF) 0097H A/D Conversion Fault (CPF22)
001EH Digital Operator Connection (oPr) 0098H PWM Feedback Fault (CPF23)
001FH EEPROM Write Error (Err) 0099H Drive capacity signal fault (CPF24)
0021H MEMOBUS/Modbus Communication Error (CE) 0101H Option compatibility error (oFA00)
0027H PROFIBUS-DP Option External Fault (EF0)
u
Alarm Register Contents
The table below shows the alarm codes that can be read out from MEMOBUS/Modbus register 007FH.
Table C.5
Alarm Register 007FH Contents
Alarm Code Fault Name Alarm Code Fault Name
0001H Undervoltage (Uv) 000BH External Fault 5, input terminal S5 (EF5)
0002H Overvoltage (ov) 0014H MEMOBUS/Modbus Communication Error (CE)
0003H Heatsink Overheat (oH) 0017H Motor Overload (oL1)
0005H Overtorque 1 (oL3) 0018H Drive Overload (oL2)
0007H Run commands input error (EF) 0020H MEMOBUS/Modbus Test Mode Fault (SE)
0008H Drive Baseblock (bb) 0039H External Fault (input terminal S1) (EF1)
0009H External Fault 3, input terminal S3 (EF3) 003AH External Fault (input terminal S2) (EF2)
000AH External Fault 4, input terminal S4 (EF4)
C.10 MEMOBUS/Modbus Data Table
YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual
229
C
MEMOBUS/Modbus
Communications
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