YASKAWA FSDrive-MV1000 Series Instructions For Use Manual page 163

Digital Operator Display
CE
Cause
Communications data error occurred due to
electrical interference.
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.
Digital Operator Display
CrST
Cause
Fault reset was being executed when a Run
command was entered.
Digital 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.
Brake is holding the PG.
Digital Operator Display
dnE
Cause
The Run command was input while the signal
was switched off when "Drive Enable" has been
set for a contact input (H1-
Digital Operator Display
EF
Cause
Sequence error
YASKAWA ELECTRIC TOEP C710687 02B FSDrive-MV1000 Instructions
MEMOBUS/Modbus Communication Error
Control data was not received correctly for two seconds.
• Check the various options available to minimize the effects of electrical
interference.
• Counteract electrical interference in the control circuit, main circuit, and
ground wiring.
• If the magnetic contactor is identified as a source of electrical
interference, install a surge protector to the MC coil.
• Use only recommended cables or other shielded line. Ground the shield
on the controller side or on the drive input power side.
• Separate all communication wiring from drive power lines. Install an
EMC noise filter to the drive input power supply.
Check the H5 parameter settings and the protocol setting in the controller
and 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 and 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
A fault reset command was entered while the Run command was still present.
• Ensure that a Run command has cannot be entered from the external
terminals or option during fault restart.
• Turn off the Run command.
Speed Deviation (for Control Mode with PG)
The deviation between the speed reference and speed feedback is greater than the setting in
F1-10 for longer than the time in F1-11.
Reduce the load.
Increase acceleration and deceleration times (C1-01 to C1-08).
Check the machine.
Check the settings of parameters F1-10 and F1-11.
Ensure the brake releases properly.
Drive Disabled
Check the operation sequence.
= 6A or 70).
Forward/Reverse Run Command Input Error
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 is detected, the motor ramps to
stop.
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
5.5 Alarm Detection
Minor Fault Output
H2- =10
Yes
Minor Fault Output
H2- =10
No
Minor Fault Output
H2- =10
Yes
Minor Fault Output
H2- =10
Yes
Minor Fault Output
H2- =10
Yes
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