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Protective Functions
Alarm
Protection
Code No.
* Encoder A/ B-
2 0
phase
error
* Encoder
2 1
communication
error
* Encoder
2 2
connection
error
*
Encoder
2 3
communication
data error
Position error
2 4
Over-speed
2 6
error
Command
2 7
pulse sealer
error
Alarm
Protection
CodeNo.
Cause
No encoder A- and B-phase pulse is
detected. The encoder failed.
Due to no communication between the
encoder and amplifier, the detective
function for broken encoder wires is
activated.
The connection between the encoder
and amplifier is broken.
The encoder sends an erroneous data
mainly due to noises. The encoder is
connected correctly, though the data is
not correct.
The position error pulse is larger than
Pr63 (position error limit).
1) Operation of the motor does not
follow thecommands.
2) Pr63 value (Position error limit) is
smaller.
]
The motor velocity exceeds the
specified limit.
The scale ratios set by Pr46 through
Pr4B (numerator of 1st to 4th command
scale) are not correct.
Cause
- 84 -
Countermeasures
Correct the encoder wiring per the
wiring diagram. Correct the connection
of the pins.
Make sure that the power of the encoder
is 5VDC
±5% (4.75 to 5.25V).
Especially when the wire length is long,
it is important to meet this requirement.
You should not bundle the encoder
wires
and
motor
wires
Connect the shield to FG. See the
encoder wiring diagram.
1) Check whether the motor operates
perthe position command pulse or
not. See the torque monitor to check
if the output torque is saturated.
Readjust the gains. Maximize the
value of Pr5E (torque limit set-up).
Correct the encoder wiring per the
wiring diagram. Increase the
acceleration and deceleration time.
Reduce the load and velocity.
2) Increase the value of Pr63.
Do
not
give
excessive
commands. Check the frequency of the
command pulse and scale ratio. If an
overshoot occurs due to wrong gain
adjustment, readjust the gains. Correct
the encoder wiring per the wiring
diagram.
Check the set values of Pr46 through
4B. Adjust the scale ratio so that the
frequency of the command pulse may
be 500 kpps or less.
Countermeasures
together.
speed
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