Register No. Contents0021HFault Contents 1bit 0 Overcurrent (oC), Ground fault (GF)bit 1 Overvoltage (ov)bit 2 Drive Overload (oL2)bit 3 Overheat 1 (oH1), Drive Overheat Warning (oH2)bit 4 Dynamic Braking Transistor Fault (rr), Braking Resistor Overheat (rH)bit 5 Reservedbit 6 PID Feedback Loss (FbL / FbH)bit 7 EF to EF8: External Faultbit 8 CPFoo: Hardware Fault (includes oFx)bit 9 Motor Overload (oL1), Overtorque Detection 1/2 (oL3/oL4), Undertorque Detection 1/2 (UL3/UL4)bit A Reservedbit B Main Circuit Undervoltage (Uv)bit C Undervoltage (Uv1), Control Power Supply Undervoltage (Uv2), Soft Charge Circuit Fault (Uv3)bit D Output Phase Loss (LF), Input Phase Loss (PF)bit E MEMOBUS/Modbus Communication Error (CE), Option Communication Error (bUS)bit F Operator Connection Fault (oPr)0022HData Link Statusbit 0 Writing data or switching motorsbit 1 Reservedbit 2bit 3 Upper or lower limit errorbit 4 Data conformity errorbit 5 Writing to EEPROMbit 6 to bit F Reserved0023H Frequency Reference <1>0024H Output Frequency <1>0025H Output Voltage Reference, 0.1 V units (units are determined by parameter H5-10)0026H Output Current, 0.1 A units0027H Output Power0028H Reserved0029HFault Contents 2bit 0 IGBT Short Circuit (SC)bit 1 Ground Fault (GF)bit 2 Input Phase Loss (PF)bit 3 Output Phase Loss (LF)bit 4 Braking Resistor Overheat (rH)bit 5 Reservedbit 6 Motor Overheat 2 (PTC input) (oH4)bit 7 to bit F ReservedC.9 MEMOBUS/Modbus Data Table522 YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual