YASKAWA D1000 Series Instruction Manual page 119

Digital Operator
Minor Fault Name
Display
Option Communication
bUS
Cause
Connection is broken or master controller
stopped communicating.
Option is damaged.
The option is not properly connected to the
converter.
A data error occurred due to noise.
Digital Operator
Minor Fault Name
Display
Serial Communication
CALL
Transmission Error
Cause
Communications wiring is faulty, there is a
short circuit, or something is not connected
properly.
Programming error on the master side.
Communications circuitry is damaged.
Termination resistor setting is incorrect.
Digital Operator
Minor Fault Name
Display
MEMOBUS/Modbus
CE
Communication Error
Cause
A data error occurred due to noise.
Communication protocol is incompatible.
The CE detection time (H5-09) is set shorter
than the time required for a communication
cycle to take place.
YASKAWA ELECTRIC TOEP C710656 07A YASKAWA Power Regenerative Converter - D1000 Instruction Manual
• The connection was lost after initial communication was established.
• Assign a Run command frequency reference to the option.
Error
• Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as needed.
If there are no problems with the wiring and the fault continues to occur, replace the option.
• The connector pins on the option are not properly lined up with the connector pins on the
converter.
• Reinstall the option.
• 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 converter input power lines. Install an
EMC noise filter to the converter input power.
Communication has not yet been established.
• Check for wiring errors.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as needed.
Check communications at start-up and correct programming errors.
• Perform a self-diagnostics check.
• If the problem continues, replace either the control board or the entire converter. For
instructions on replacing the control board, contact Yaskawa or your nearest sales representative.
Install a termination resistor at both ends of a communication line. Set the internal termination
resistor switch correctly on slave converters. Place DIP switch S2 to the ON position.
Control data was not received correctly for two seconds.
• 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
converter input power side.
• Separate all wiring for communication devices from converter input power lines. Install an
EMC noise filter to the converter input power supply.
• Check the H5 parameter settings and the protocol setting in the controller.
• Ensure settings are compatible.
• Check the PLC.
• Change the software settings in the PLC.
• Set a longer CE detection time using parameter H5-09.
5.3 Alarm Detection
Detail
Possible Solutions
Detail
Possible Solutions
Detail
Possible Solutions
Alarm
Output
(H2- =10)
YES
Alarm
Output
(H2- =10)
YES
Alarm
Output
(H2- =10)
YES
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