Digital Operator Display Minor Fault NameA data error occurred due to noise.• Check options available to minimize the effects of noise.• Take steps to counteract noise in the control circuit wiring, main circuit lines and ground wiring.• Try to reduce noise on the controller side.• Use surge absorbers on magnetic contactors or other equipment causing the disturbance.• Use recommended cables or some other type of shielded line. Ground the shield to the controller side oron the input power side.• Separate the wiring for communication devices from the drive input power lines. Install an EMC noisefilter to the drive input power.Digital Operator Display Minor Fault NameCALL Serial Communication Transmission ErrorCommunication has not yet been established.Cause Possible SolutionsCommunications wiring is faulty, there is ashort circuit, or something is not connectedproperly.• Check for wiring errors.• Correct the wiring.• Check for disconnected cables and short circuits. Repair as needed.Programming error on the master side. Check communications at start-up and correct programming errors.Communications circuitry is damaged.• Perform a self-diagnostics check.• If the problem continues, replace either the control board or the entire drive. For instructions on replacingthe control board, contact Yaskawa or your nearest sales representative.Termination resistor setting is incorrect. Install a termination resistor at both ends of a communication line. Set the internal termination resistor switchcorrectly on slave drives. Place DIP switch S2 to the ON position.Digital Operator Display Minor Fault NameCE MEMOBUS/Modbus Communication ErrorControl data was not received correctly for two seconds.Cause Possible SolutionsA data error occurred due to noise.• Check options available to minimize the effects of noise.• Take steps to counteract noise in the control circuit wiring, main circuit lines, and ground wiring.• Reduce noise on the controller side.• Use surge absorbers for the magnetic contactors or other components that may be causing the disturbance.• Use only recommended shielded line. Ground the shield on the controller side or on the drive input powerside.• Separate all wiring for communication devices from drive input power lines. Install an EMC noise filterto the drive input power supply.Communication protocol is incompatible. • Check the H5 parameter settings and the protocol setting in the controller.• Ensure settings are compatible.The CE detection time (H5-09) is setshorter than the time required for acommunication cycle to take place.• Check the PLC.• Change the software settings in the PLC.• Set a longer CE detection time using parameter H5-09.Incompatible PLC software settings orthere is a hardware problem.• Check the PLC.• Remove the cause of the error on the controller side.Communications cable is disconnected ordamaged.• Check the connector to make sure the cable has a signal.• Replace the communications cable.Digital Operator Display Minor Fault NameCrST Cannot ResetCause Possible SolutionsFault reset was being executed when a Runcommand was entered.• Ensure that a Run command cannot be entered from the external terminals or option during fault reset.• Turn off the Run command.Digital Operator Display Minor Fault NamednE Drive DisabledCause Possible Solutions“Drive Enable” is set to a multi-functioncontact input (H1-oo = 6A) and thatsignal was switched off.Check the operation sequence.6.5 Alarm Detection312 YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
