YASKAWA CIMR-JA Series Installation & Start-Up Manual page 135

Cause
A data error occurred due to
noise.
Communication protocol is
incompatible.
Communication does not take
place every 2 s.
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
EF2
EF3
EF4
YASKAWA ELECTRIC TOEP C710606 25B YASKAWA AC Drive J1000 Installation & Start-Up Manual
Possible Solutions
• 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.
Can Not Reset
According to the pulse input (RP), the speed deviation is greater than the setting in
F1-10 for a time longer than the setting in F1-11.
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.
External fault (input terminal S2)
External fault at multi-function input terminal S2.
External fault (input terminal S3)
External fault at multi-function input terminal S3.
External fault (input terminal S4)
External fault at multi-function input terminal S4.
5.5 Alarm Detection
Minor Fault Name
Minor Fault Name
Minor Fault Name
Minor Fault
(H2-01 = 10)
YES
YES
YES
YES
YES
Minor Fault
Output
(H2-01 = 10)
YES
5
Minor Fault
Output
(H2-01 = 10)
YES
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