Mitsubishi Electric MELDAS MDS-B-SVJ2 Series, Specifications And Instruction Manual

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Chapter 8 Troubleshooting
8-5
No. Name Details Cause of occurrence Investigation method Remedy
2C Motor side
detector:
EEPROM/LED
error
The LED in the
detector has
deteriorated. Detector fault (life) Check the repeatability.
Check the ambient environment.
Replace the detector.
Review the ambient
environment.
2D Motor side
detector: Data
error
Detector position
data error Detector fault Check the repeatability.
Check the ambient environment.
Replace the detector.
Review the ambient
environment.
The detector input
connector is
disconnected. Connect correctly.
The detector cable is
broken.
The alarm 18 occurs when the power is
turned ON.
Check the connector (CN2) connection.
Replace the detector
cable.
Detector fault
Amplifier input circuit
fault
Alarm 18 occurs when the power is turned
ON.
Exchange the detector and amplifier con-
nection with that for another axis and check
the repeatability. (Pinpoint the cause)
Replace the parts on
the side that caused
the alarm.
Cable noise Is the cable shielded?
Is the cable wired in the same conduit as
the motor power line? Review the cable
wiring and shield.
2F Motor side
detector:
Communication
error
Communication
with the detector
was cut off or there
was an error in the
received data.
Incorrect grounding Are the motor grounding and amplifier
grounding grounded separately? Ground the motor and
amplifier at one point.
The regenerative
resistor selection is
incorrect. Check the regeneration capacity. Change the
regenerative resistor.
The parameter setting
is incorrect. Check the parameter (SV036). Set correctly.
30 Over
regeneration
Overheating of the
regenerative
resistor was
detected.
The power voltage is
high. (260V or more) Occurs at ready OFF.
Check the power voltage with a tester.
Review the power
supply.
The axis specification
parameter (rapid)
setting is incorrect. Check the machine specifications. Set correctly.
The servo parameter
setting is incorrect. Check SV001 (PC1), SV002 (PC2), SV018
(PIT), SV025 (MTYP). Set correctly.
Is the speed loop gain too low? Adjust the gain.
Is the acceleration/deceleration time
constant too short causing the current to be
limited? Increase the
acceleration/decele-r
ation time constant.
The speed is
overshooting.
Is the current limit value too low? Adjust the limit value.
31 Overspeed The motor speed
exceeded the
tolerable value.
Detector fault Does the alarm occur when the power is
turned ON?
Change with another axis and check the
repeatability.
Replace the detector.
The motor power line
(U, V, W phase) has a
short circuit or ground
fault. • Replace the cable
• Correct the
connection
32 Power module
overcurrent
The power module
overcurrent
protection function
activated.
Amplifier fault
This should happen simultaneously with
ready ON.
Check the motor cable and connection.
Check the conductivity between the cables.
Replace the amplifier.
The power voltage is
high. (280V or more) Occurs at ready ON.
Check the power voltage with a tester.
Review the power
supply.
Broken wire in the
regenerative resistor.
The resistor wire is
broken.
Check the resistance value of the
regenerative resistor. Replace the
regenerative resistor.
P-D are not short-
circuited when using
the standard (built-in)
regenerative resistor. Check the connectors at the bottom of the
amplifier. (SVJ2-01 to 07)
Are the P and D terminal screws securely
fastened?
Correctly connect.
Power supply
connector is faulty
when using the
SVJ2-01 to 07. The connection in the connector at the
bottom of the amplifier is faulty or broken. Replace the
connector.
SV036 is the standard
setting when using the
MDS-B-SVJ2-01. Check the parameter (SV036).
1000 is set when using the option
regenerative resistor.
Set correctly.
33 Overvoltage The PN bus wire
voltage exceeded
400 V.
[Also detected
when the control
axis is removed.]
The regenerative capa-
city is large when using
the MDS-B-SVJ2-01. An external option regenerative resistor is
not being used. Use an option
regenerative resistor.