Troubleshooting At A Startup; In The Case Of Type A - Mitsubishi Electric MELSERVO-J2S Series Manual

４.３ Troubleshooting at a Startup
CAUTION
This section shows some troubles that may occur at the time of startup along with their countermeasures.
４.３.１ In the Case of Type A
No. Startup Flow
1 Turn on power. ･The LED does not turn on.
･The LED blinks.
An alarm occurs.
2 Turn on servo-on An alarm occurs.
(SON).
A servo lock does not
occur. (The servomotor
shaft is free.)
* For what to do when an alarm occurs, see section 6.1.
●Never make any extreme adjustment/change in parameters. Doing so makes operation
unstable.
●After setting up the parameters, check the settings carefully, and conduct test
operations. If a parameter is incorrect, operation will be unstable.
Trouble Investigation
Connectors CN1, CN2, and CN6 on
the side of the servo amplifier
are disconnected, but no
improvement is seen.
Connectors CN1A, CN1B, CN2, and
CN3 of the conversion cable of
Renewal Kit are disconnected, but
no improvement is seen.
Connector CN1A or CN1B of the
conversion cable of Renewal Kit is
disconnected, and an improvement
is seen.
Connector CN2 of the conversion
cable of Renewal Kit is
disconnected, and an improvement
is seen.
See the MR-J4 Servo Amplifier Technical Materials (Troubleshooting) issued by Mitsubishi Electric
Corporation, and remove the cause.
AL.E6.1 1. Check if power is supplied to
Renewal Kit (terminals L11 and
L21).
2. Connectors CN1A and CN1B on the
servo amplifier side and
connectors CN1A and CN1B on the
conversion cable of Renewal Kit
are reconnected, and an
improvement is seen.
See the MR-J4 Servo Amplifier Technical Materials (Troubleshooting) issued by Mitsubishi Electric
Corporation, and remove the cause.
1. Check if power is supplied to
Renewal Kit (terminals L1, L2,
L3, L11, and L21).
2. Check if the display indicates
that the system is ready.
3. Use the external input signal
display (MR-J4-□A Servo
Amplifier Technical Materials,
Section 4.5, issued by Mitsubishi
Electric Corporation) to check if
servo-on (SON) is on.
4. Use the external input signal
display (MR-J4-□A Servo
Amplifier Technical Materials,
Section 4.5, issued by
Mitsubishi Electric
Corporation.) to check if reset
(RES) is on.
Possible Cause
1. Defective power source/voltage
2. Defective servo amplifier
1. Short circuit in power supply
to the conversion cable wiring
of Renewal Kit
2. Defective conversion cable of
Renewal Kit
Short circuit in power supply to
the cable wiring of currently used
CN1A or CN1B
1. Short circuit in power supply to
the cable wiring of the
currently used encoder
2. Defective encoder
1. 24V DC power is not supplied to
the power input signal source
(DICOM) for the digital
interface.
2. 24V DC power is not supplied
because of an incorrect
connection of a connector.
1. Servo-on (SON) is not on
(defective connection or
incorrect connection of a
connector).
2. 24V DC power is not supplied to
the power input signal source
(DICOM) for the digital
interface.
3. Reset (RES) is on or
short-circuited.
４-７
4 － 7
Countermeasures
1. Check the power supply voltage.
2. Replace the servo amplifier.
Replace the conversion cable.
Replace the currently used cable.
1. Replace the currently used
encoder cable.
2. Replace the currently used
encoder.
1. Supply 24V DC power correctly.
2. Connect the connectors
correctly.
1. Connect the connectors
correctly.
2. Supply 24V DC power correctly.
3. Turn off reset (RES).