YASKAWA T1000V Technical Manual page 257

LED 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.
LED Operator Display
CrST
Cause
A fault reset was being executed while
the Run command was still enabled.
LED Operator Display
dEv
Cause
Load is too heavy
Acceleration and deceleration times are
set too short.
The load is locked up.
Parameter settings are inappropriate.
The motor brake engaged.
LED Operator Display
Cause
Sequence error
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
MEMOBUS/Modbus Communication Error
Control data was not received correctly for two seconds.
• 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
an EMC 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.
• Set a longer CE detection time (H5-09).
• 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.
• Minor Fault Name
Can Not Reset
During a fault, the fault reset signal was entered while a Run command was activated.
• Ensure that a Run command cannot be entered from the external terminals or option
card during fault reset.
• Turn off the Run command.
Speed Deviation (for Simple V/f with PG)
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.
Reduce the load.
Increase the acceleration and deceleration times (C1-01 through C1-08).
Check the machine.
Check the settings of parameters F1-10 and F1-11.
Ensure the brake releases properly.
Forward/Reverse Run Command Input Error
EF
Both forward run and reverse run closed simultaneously for over 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
Possible Solutions
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
6.5 Alarm Detection
Minor Fault
(H2- = 10)
YES
YES
YES
YES
YES
Minor Fault
Output
(H2- = 10)
YES
Minor Fault
Output
(H2- = 10)
YES
YES
YES
YES
YES
Minor Fault
Output
(H2- = 10)
YES
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