Table of Contents
1. When in Trouble
Protective function (Detail of error code)
Protective
Error code No.
function
Main Sub
*
18
Over-
regeneration
load
protection
*
18
Regenerative
transistor
error
protection
*
21
Encoder
communica-
tion discon-
nection error
protection
*
Encoder
communica-
tion error
protection
*
23
Position
deviation
excess
protection
Note
• When protective function marked with
not be disabled by the alarm clear input (A-CLR). To return to the normal operation, turn off
power, remove the cause, and then turn on power again.
Related page
• P.4-6... "Details of parameter"
6-6
Causes
0
Regenerative energy has exceeded the
capacity of regenerative resistor.
1) Due to the regenerative energy during
deceleration caused by a large load
inertia, converter voltage has risen,
and the voltage is risen further due to
the lack of capacity of absorbing this
energy of the regeneration discharge
resistor.
2) Regenerative energy has not been
absorbed in the specified time due to a
high motor rotational speed.
3) Active limit of the external regenerative
resistor has been limited to 10% duty.
Caution
Install an external protection such as thermal fuse without fail when
you set up Pr0.16 to 2. Otherwise, regenerative resistor loses the
protection and it may be heated up extremely and may burn out.
1
Regenerative driver transistor on the
servo driver is defective.
0
Communication between the encoder
and the driver has been interrupted
in certain times, and disconnection
detecting function has been triggered.
1
Communication error has occurred in
data from the encoder. Mainly data
error due to noise. Encoder cables are
connected, but communication data has
some errors.
0
Data communication between the
encoder is normal, but contents of data
are not correct.
Mainly data error due to noise. Encoder
cables are connected, but communication
data has some errors.
Check the load factor of the regenerative
resistor from the front panel or via communi-
cation.
Do not use in the continuous regenerative
brake application.
1) Check the running pattern (velocity
monitor). Check the load factor of the
regenerative resistor and over-regeneration
warning display. Increase the capacity
of the driver and the motor, and loosen
the deceleration time. Use the external
regenerative resistor.
2) Check the running pattern (speed monitor).
Check the load factor of the regenerative
resistor. Increase the capacity of the driver
and the motor, and loosen the deceleration
time. Lower the motor rotational speed.
Use an external regenerative resistor.
3) Set up Pr0.16 to 2.
Replace the driver.
Make a wiring connection of the encoder as
per the wiring diagram. Correct the miswiring
of the connector pins.
• Secure the power supply for the encoder of
DC5V±5% (4.75 to 5.25V)...pay an attention
especially when the encoder cables are
long.
• Separate the encoder cable and the motor
cable if they are bound together.
• Connect the shield to FG.
*
in the protective function table is activated, it can-
Measures
Hide quick links:
Chapters
Table of Contents
