YASKAWA A1000 Technical Manual page 351

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
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
A fault reset command was entered while the Run
command was still present.
Digital Operator Display
CyC
Cause
The controller is using a comm. cycle beyond the
allowable setting range for the MECHATROLINK
option.
Digital Operator Display
dEv
Cause
Load is too heavy
Acceleration and deceleration times are set too short. Increase the acceleration and deceleration times (C1-01 through C1-08).
The load is locked up.
Parameter settings are inappropriate.
Incorrect speed feedback scaling if terminal RP is
used as speed feedback input in V/f Control.
The motor brake engaged.
Digital Operator Display
dnE
Cause
"Drive Enable" is set to a multi-function contact
input (H1- = 6A) and that signal was switched
off.
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical 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.
A termination resistor must be installed at both ends of a communication line. Slave drives must have the internal
termination resistor switch set correctly. Place DIP switch S2 to the ON position.
MEMOBUS/Modbus Communication Error
CE
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 comm. devices from drive input power lines. Install an EMC noise filter to the drive input
power supply.
• Check the H5 parameter settings as well as 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 (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 card during fault reset.
• Turn off the Run command.
MECHATROLINK Comm. Cycle Setting Error
Comm. Cycle Setting Error was detected.
Set the comm. cycle for the upper controller within the allowable setting range for the MECHATROLINK option.
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.
Reduce the load.
Check the machine.
Check the settings of parameters F1-10 and F1-11.
• Set H6-02 to value of the speed feedback signal frequency when the motor runs at the maximum speed.
• Adjust the speed feedback signal using parameters H6-03 through H6-05.
• Make sure the speed feedback signal frequency does not exceed he maximum input frequency of terminal RP.
Ensure the brake releases properly.
Drive Disabled
Check the operation sequence.
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
Minor Fault Name
Possible Solutions
6.5 Alarm Detection
Minor Fault
(H2- = 10)
YES
Minor Fault
(H2- = 10)
YES
Minor Fault
(H2- = 10)
YES
Minor Fault
(H2- = 10)
YES
Minor Fault
(H2- = 10)
YES
Minor Fault
(H2- = 10)
YES
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