YASKAWA 1000 Series Installation Manual

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Contents

YASKAWA ELECTRIC TOBP C730600 42D 1000-Series Option SI-P3 Installation Manual 338 Troubleshooting8 Troubleshooting◆ Drive-Side Error CodesTable 13 lists the various fault codes related to the option. Further details on various faultscan be found in the drive Technical Manual.■ FaultsBoth bUS (Option Communication Error) and EF0 (External Fault Input from the option)can appear as either an alarm or as a fault. When a fault occurs, the digital operator ALMLED remains lit. When an alarm occurs, the digital operator ALM LED flashes.Check the following items first when an error code occurs on the drive:• Communication cable connections• Make sure the option is properly installed to the drive• Operation status of the controller program and controller CPU• Did a momentary power loss interrupt communications?Table 13 Fault Displays, Causes, and Possible SolutionsDigital Operator Display Fault NamebUSOption Communication ErrorThe connection was lost after establishing initial communication.Only detected when the run command frequency reference is assigned to the option(bl-01 = 3 or bl-02 = 3).Cause Possible SolutionMaster controller (PLC) hasstopped communicating. Check for faulty wiring.Correct any wiring problems.Communication cable is notconnected properly.A data error occurred due tonoise.• Counteract noise in control circuit wiring, main circuit lines, and ground wiring.• If a magnetic contactor is the noise source, install a surge absorber to thecontactor coil.• Use cables recommended by Yaskawa or another type of shielded line. Groundthe shield on the controller side and on the option side.Option is damaged. If there are no wiring problems and the error continues to occur, replace the option.Digital Operator Display Fault NameEF0 External Fault Input from the optionThe alarm function for an external device has been triggered.Cause Possible SolutionAn external fault is being sentfrom the main controller (PLC).• Remove the cause of the external fault.• Reset the external fault input from the PLC device.Problem with the PLC program. Check the program used by the PLC and make the appropriate corrections.