YASKAWA CIMR-JC4A0002BAA Quick Start Manual page 142

A data error occurred due to
noise.
Communication protocol is
incompatible.
The communication cycle is
longer than 2 seconds.
Incompatible PLC software
settings or there is a hardware
problem.
Communications cable is
disconnected or damaged.
LED Operator Display
CrST
Cause
Fault reset was being executed
when a run command was
entered.
LED Operator Display
EF
Cause
Sequence error
LED Operator Display
EF1
YASKAWA ELECTRIC TOEP C710606 26B YASKAWA AC Drive – J1000 Quick Start Guide
• 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.
• 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.
• Check the PLC.
• Remove the cause of the error on the controller side.
• Check the connector for a signal through the cable.
• Replace the communications cable.
Cannot Reset
Possible Solutions
• Ensure that a run command cannot be entered from the
external terminals or option unit during fault reset.
• Turn off the run command.
Forward/Reverse Run Command Input Error
Both forward run and reverse run closed simultaneously for over 0.5 s.
Possible Solutions
Check the forward and reverse command sequence and correct
the problem.
Note: When minor fault EF detected, motor ramps to stop.
External fault (input terminal S1)
External fault at multi-function input terminal S1.
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5.5 Alarm Detection
Minor Fault Name
Minor Fault Name
Minor Fault Name
YES
YES
YES
YES
YES
Minor Fault
Output
(H2-01 = 10)
YES
5
Minor Fault
Output
(H2-01 = 10)
YES
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