YASKAWA Z1000 User Manual page 217

Digital Operator Display
CALL
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 Display
CE
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.
Incompatible PLC software settings or
there is a hardware problem.
Communications cable is disconnected or
damaged.
Digital Operator Display
CrST
Cause
Fault reset was being executed when a Run
command was entered.
Digital Operator Display
dnE
Cause
"Drive Enable" is set to a multi-function
contact input (H1-oo = 6A) and that
signal was switched off.
Digital Operator Display
Cause
Sequence error
YASKAWA TOEP YAIZ1U 03B YASKAWA AC Drive – Z1000 User Manual
Serial Communication Transmission Error
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 drive. 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 drives. Place DIP switch S2 to the ON position.
MEMOBUS/Modbus Communication Error
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 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.
• 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.
• Check the PLC.
• Remove the cause of the error on the controller side.
• Check the connector to make sure the cable has a signal.
• Replace the communications cable.
Cannot Reset
• Ensure that a Run command cannot be entered from the external terminals or option during fault reset.
• Turn off the Run command.
Drive Disabled
Check the operation sequence.
Forward/Reverse Run Command Input Error
EF
Both forward run and reverse run closed simultaneously for longer than 0.5 s.
Check the forward and reverse command sequence and correct the problem.
Note: When minor fault EF detected, motor ramps to stop.
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
5.5 Alarm Detection
217
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