PowerFlex 750-Series AC Drives User Manual

Troubleshooting 4-13Dual Incremental EncoderFaults and AlarmsThe table below contains a list of encoder-specific faults and alarms, thetype of fault or alarm, the action taken when the drive faults, the parameterused to configure the fault or alarm (if applicable), and a description andaction (where applicable).Table 4.H Dual Incremental Encoder Fault and Alarm Types, Descriptions andActionsEventNo. (1) Fault/Alarm Text TypeFaultActionConfigurationParameterAutoReset Description/Action(s)xx000 Enc0 Open Wire Configurable P3[Enc 0 FB Lss Cfg]The dual encoder module has detected an encoder 0 inputsignal (A, B, or Z) in the same state as its complement (ANot, B Not, or Z Not). For open wire detection to work, theencoder signals must be differential (not single ended). TheZ channel is only checked when enabled. See P1 [Enc 0Cfg].xx001 Enc0 Phase Loss Configurable P3[Enc 0 FB Lss Cfg]More than 30 encoder 0 phase loss (open wire) events haveoccurred over an 8 millisecond time period. The samerestrictions as for Enc0 Open Wire detection apply.xx002 Enc0 Quad Loss Configurable P3[Enc 0 FB Lss Cfg]Encoder 0 Quadrature loss events occur when simultaneousedge transitions occur on both the A and B channels ofencoder 0. This fault will occur when more than 10 quad lossevents over a 10 millisecond time period are detected. Onlyvalid when both A and B channels are used (not Bit 1 “AChan Only”) in P1 [Enc 0 Cfg].xx030 Enc1 Open Wire Configurable P13[Enc 1 FB Lss Cfg]The dual encoder module has detected an encoder 1 inputsignal (A, B, or Z) in the same state as its complement (ANot, B Not, or Z Not). For open wire detection to work, theencoder signals must be differential (not single ended). TheZ channel is only checked when enabled. See P11 [Enc 1Cfg].xx031 Enc1 Phase Loss Configurable P13[Enc 1 FB Lss Cfg]More than 30 encoder 1 phase loss (open wire) events haveoccurred over an 8 millisecond time period. The samerestrictions as for Enc1 Open Wire detection apply.xx032 Enc1 Quad Loss Configurable P13[Enc 1 FB Lss Cfg]Encoder 1 Quadrature loss events occur when simultaneousedge transitions occur on both the A and B channels ofencoder 1. This fault will occur when more than 10 quad lossevents over a 10 millisecond time period are detected. Onlyvalid when both A and B channels are used (not Bit 1 “AChan Only”) in P11 [Enc 1 Cfg].xx058 Module Defaulted Fault Coast Module was commanded to write default values.(1) xx indicates the port number. Refer to Fault and Alarm Display Codes on page 4-4 for an explanation.PowerFlex 750-Series User Manual – Publication 750-UM001C-EN-P – September 2009