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 a Yaskawa 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.
CyC
MECHATROLINK Comm. Cycle Setting Error
Comm. Cycle Setting Error was detected.
dEv
Speed Deviation (when using a PG option card and AOLV/PM without PG)
The deviation between the speed reference and speed feedback is greater than the setting in F1-10 for longer
than the time in F1-11.
Digital Operator Display Minor Fault Name
dnE Drive Disabled
Cause Possible Solutions
“Drive Enable” is set to a multi-function
contact input (H1-oo = 6A) and that
signal was switched off.
Check the operation sequence.
5.3 Alarm Detection
YASKAWA ELECTRIC TOEP C710616 41G YASKAWA AC Drive - A1000 Quick Start Guide
197
5
Troubleshooting
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