Digital Operator Display
Minor Fault Name
A 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 or
on the input power side.
• Separate the wiring for communication devices from the drive input power lines. Install an EMC noise
filter to the drive input power.
Digital Operator Display
Minor Fault Name
CALL
Serial Communication Transmission Error
Communication has not yet been established.
Cause
Possible Solutions
Communications wiring is faulty, there is a
short circuit, or something is not connected
properly.
• 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 replacing
the 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 switch
correctly on slave drives. Place DIP switch S2 to the ON position.
Digital Operator Display
Minor Fault Name
CE
MEMOBUS/Modbus Communication Error
Control data was not received correctly for two seconds.
Cause
Possible Solutions
A 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 power
side.
• Separate all wiring for communication devices from drive input power lines. Install an EMC noise filter
to 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 set
shorter than the time required for a
communication 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 or
there is a hardware problem.
• Check the PLC.
• Remove the cause of the error on the controller side.
Communications cable is disconnected or
damaged.
• Check the connector to make sure the cable has a signal.
• Replace the communications cable.
Digital Operator Display
Minor Fault Name
CrST
Cannot Reset
Cause
Possible Solutions
Fault reset was being executed when a Run
command 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 Name
CyC
MECHATROLINK Comm. Cycle Setting Error
Comm. Cycle Setting Error was detected.
Cause
Possible Solutions
The controller is using a comm. cycle
beyond the allowable setting range for the
MECHATROLINK option.
Set the comm. cycle for the upper controller within the allowable setting range for the MECHATROLINK
option.
6.5 Alarm Detection
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
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6
Troubleshooting
Summary of Contents for U1000 iQpump Drive
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