YASKAWA P1000 Technical Manual page 207

HOA Keypad Display
Termination resistor setting is incorrect
HOA Keypad 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
HOA Keypad Display
CrST
Cause
Fault reset was being executed when a Run
command was entered
HOA Keypad Display
EF
Cause
Sequence error
HOA Keypad Display
EF0
Cause
An external fault was received from the PLC with
F6-03 set to 3, which allows the drive to continue
running after an external fault occurs
There is a problem with the PLC program
HOA Keypad Display
FbH
Cause
Parameter settings for b5-36 and b5-37 are
incorrect
PI feedback wiring is faulty
YASKAWA SIEP YAIP1B 01B YASKAWA AC Drive – P1000 Bypass Technical Manual
Install a termination resistor at both ends of a communication line. Set the internal termination resistor
switch correctly on slave drives. Place DIP switch S2 to the ON position.
MEMOBUS/Modbus Communication Error
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 communication devices from drive input power lines.
• Check the Z3 parameter settings and 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 using parameter Z3-06.
• 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 during fault
reset.
• Turn off the Run command.
Forward/Reverse Run Command Input Error
Both forward run and reverse run closed simultaneously for longer than 0.5 s.
Check the forward and reverse command sequence and correct the problem.
Note: When minor fault EF detected, motor ramps to stop.
Option Card External Fault
An external fault condition is present.
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
Check the PLC program and correct problems.
Excessive PI Feedback
The PI feedback input is higher than the level set to b5-36 for longer than the time set to b5-37, and
b5-12 is set to 1 or 4.
Check parameters b5-36 and b5-37.
Correct the wiring.
Minor Fault Name
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
207
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