YASKAWA FSDrive-MV1000 Series - Page 163

5.5 Alarm Detection
YASKAWA ELECTRIC TOEP C710687 02B FSDrive-MV1000 Instructions 163
Troubleshooting
5
Digital Operator Display Minor Fault Name
CE
MEMOBUS/Modbus Communication Error
Control data was not received correctly for two seconds.
Cause Possible Solutions
Minor Fault Output
H2-=10
Communications data error occurred due to
electrical interference.
• 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.
Yes
Communication protocol is incompatible.
Check the H5 parameter settings and the protocol setting in the controller
and ensure settings are compatible.
The CE detection time (H5-09) is set shorter
than the time required for a communication
cycle to take place.
• Check the PLC
• Change the software settings in the PLC
• Set a longer CE detection time (H5-09)
Incompatible PLC software settings or there is a
hardware problem.
Check the PLC and remove the cause of the error on the controller side.
Communications cable is disconnected or
damaged.
Check the connector to make sure the cable has a signal. Replace the
communications cable.
Digital Operator Display Minor Fault Name
CrST
Cannot Reset
A fault reset command was entered while the Run command was still present.
Cause Possible Solutions
Minor Fault Output
H2-=10
Fault reset was being executed when a Run
command was entered.
• Ensure that a Run command has cannot be entered from the external
terminals or option during fault restart.
• Turn off the Run command.
No
Digital Operator Display Minor Fault Name
dEv
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.
Cause Possible Solutions
Minor Fault Output
H2-=10
Load is too heavy. Reduce the load.
Yes
Acceleration and deceleration times are set too
short.
Increase acceleration and deceleration times (C1-01 to C1-08).
The load is locked up. Check the machine.
Parameter settings are inappropriate. Check the settings of parameters F1-10 and F1-11.
Brake is holding the PG. Ensure the brake releases properly.
Digital Operator Display Minor Fault Name
dnE Drive Disabled
Cause Possible Solutions
Minor Fault Output
H2-=10
The Run command was input while the signal
was switched off when “Drive Enable” has been
set for a contact input (H1- = 6A or 70).
Check the operation sequence. Yes
Digital Operator Display Minor Fault Name
EF
Forward/Reverse Run Command Input Error
Both forward run and reverse run closed simultaneously for over 0.5 s.
Cause Possible Solutions
Minor Fault Output
H2-=10
Sequence error
Check the forward and reverse command sequence and correct the
problem.
Note: When minor fault EF is detected, the motor ramps to
stop.
Yes