A data error occurred due to
noise.
• Check options available to minimize the effects of noise.
•
Counteract noise in the control circuit wiring, main circuit
lines and ground wiring.
•
Reduce noise on the controller side.
•
Use surge absorbers on magnetic contactors or other
equipment causing the disturbance.
•
Use cables recommended by Yaskawa or another type of
shielded
line.
The
shield should be grounded on the controller
side or on the drive input power side.
• Separate all wiring for communications devices from drive
input power lines. Install a noise filter to the input side of the
drive input power.
YES
Communication protocol is
incompatible.
• Check the H5 parameter settings as well as the protocol setting
in the controller.
• Ensure settings are compatible.
YES
The communication cycle is
longer than 2 seconds.
• Check the PLC.
• Change the software settings in the PLC.
YES
Incompatible PLC software
settings or there is a hardware
problem.
• Check the PLC.
• Remove the cause of the error on the controller side.
YES
Communications cable is
disconnected or damaged.
• Check the connector for a signal through the cable.
• Replace the communications cable.
YES
LED Operator Display Minor Fault Name
CrST Cannot Reset
Cause Possible Solutions
Minor Fault
Output
(H2-01 = 10)
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 unit during fault reset.
• Turn off the run command.
YES
LED Operator Display Minor Fault Name
EF
Forward/Reverse Run Command Input Error
Both forward run and reverse run closed simultaneously for over 0.5 s.
Cause Possible Solutions
Minor Fault
Output
(H2-01 = 10)
Sequence error
Check the forward and reverse command sequence and correct
the problem.
Note: When minor fault EF detected, motor ramps to stop.
YES
LED Operator Display Minor Fault Name
EF1
External fault (input terminal S1)
External fault at multi-function input terminal S1.
5.5 Alarm Detection
148
YASKAWA ELECTRIC TOEP C710606 25D YASKAWA AC Drive J1000 Installation & Start-Up Manual
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