YASKAWA SI-S3 Installation Manual

Also see for CANopen SI-S3: Installation manual Technical manual Installation manual

Contents

44 YASKAWA ELECTRIC TOBP C730600 85D YASKAWA AC Drive Option SI-S3 Installation Manual9 Troubleshooting9 Troubleshootingu Drive-Side Error CodesDrive-side error codes appear on the drive keypad. Table 8 lists causes of the errors andpossible corrective actions. Refer to the drive Technical Manual for additional error codesthat may appear on the drive keypad.n FaultsBoth bUS (option communication error) and EF0 (Option Card External Fault) can appear asan alarm or as a fault. When a fault occurs, the keypad ALM LED remains lit. When analarm occurs, the ALM LED flashes.If communication stops while the drive is running, use the following questions as a guide tohelp remedy the fault:• Is the option properly installed?• Is the communication line properly connected to the option? Is it loose?• Is the controller program working? Has the controller/PLC CPU stopped?• Did a momentary power loss interrupt communications?Table 8 Fault Display and Possible SolutionsKeypad Display Fault NamebUSOption Communication Error• After establishing initial communication, the connection was lost.• Only detected when the run command or frequency reference is assigned to theoption (b1-01=3 or b1-02=3).Cause Possible SolutionNo signal was received fromthe PLC. • Check for faulty wiring.• Correct any wiring problems.Faulty communicationswiringAn existing short circuit orcommunicationsdisconnectionCheck disconnected cables and short circuits and repair as needed.A data error occurred due toelectric interference• Counteract noise in the control circuit, main circuit, and ground wiring.• If a magnetic contactor is identified as a source of noise, install a surge absorber tothe contactor coil.• Use only recommended cables or other shielded line. Ground the shield on thecontroller side or the drive input power side.• Separate all communication wiring from drive power lines. Install an EMC noisefilter to the drive power supply input.• Counteract noise in the master controller (PLC).