Trouble case – Panasonic MINAS E-series User Manual
Page 147
147
[Trouble Case]
T
rouble Case
Protective
Functions
*Encoder
communi-
cation data
error
protection
Position
over-
deviation
protection
Over-
velocity
protection
(OS)
Command
pulse
multiplier
error
protection
Deviation
counter
overflow
protection
Software
limit
protection
*EEPROM
parameter
error
protection
*EEPROM
check code
error
protection
Overtravel
inhibit input
protection
*ABS 1-
rotation
counter
error
protection
*ABS multi-
rotation
counter
error
protection
Alarm
code No.
23
24
26
27
29
34
36
37
38
44
45
Cause
Data from the encoder results in communication
error, which is mainly caused by noise. Although
the encoder cable is connected correctly, data
results in communication error.
careful as the motor automatic recognition
abnormality protection (alarm code No.95) will be
activated when you power on again.
The position deviation pulse exceeds the position
over-deviation set-up, Pr63.
(1) The motor operation does not respond to a
command.
(2) The position over-deviation set-up Pr63 is low.
(1) The rotation speed of the motor exceeds a
specified value.
(2) Torque limit switching input selection Pr06 is
set to 2, and 1st and 2nd over-speed level set-
up Pr70, Pr73 are set to 0.
The dividing/multiplier ratio set with the numerator
of 1st and 2nd command ratio Pr46 and Pr47 is
not appropriate.
A value of the deviation counter exceeds 2
27
(134217728).
The motor operation exceeds the motor
operational range set in Pr26 (Software limit
setting) for the position command range.
(1) The gain is not appropriate.
(2) The value set in Pr26 is too small.
Data in the parameter storage area is corrupt
when it is read from EEPROM upon power-on.
EEPROM write check data is corrupt when it is
read from EEPROM upon power-on.
Both CW and CCW overtravel inhibit input turn off.
The encoder detected abnormality of a single-turn
counter.
The encoder is defective.
The encoder detected abnormality of a multi-turn
counter.
The encoder is defective.
Action
Ensure that the supply voltage of the encoder is
DC5V
±5% (4.75 to 5.25V). Be careful, in
particular, when the encoder cable is long. If it is
bundled with the motor wire, separate them.
Connect the shield to FG --- See the encoder
wiring diagram.
(1) Check that the motor rotates in accordance
with the position command pulse. Using the
torque monitor, ensure that output torque is
not saturated. Adjust gains. Maximize torque
limit set-up Pr5E. Correct encoder wires as
per the wiring diagram. Extend acceleration/
deceleration time. Alleviate load and slow
down speed.
(2) Increase Pr63.
(1) Decrease the speed to prevent over-speed
command from being issued. Set dividing/
multiplier ratio so that input frequency of a
command pulse is 500 kpps or less. In the
event of overshoot due to poorly adjusted
gains, readjust them. Connect encoder wires
as per wiring diagram.
(2) If you select torque limit switching input, set
Pr70 and Pr73 to a value within the use range
speed of the motor.
Using Pr46 and Pr47, reduce the multiplier ratio.
Set the dividing/multiplier ratio so that the
command pulse frequency will not exceed the
maximum input pulse of 500 kpps or less.
Check that the motor rotates in accordance with
the position command pulse. Using the torque
monitor, ensure that output torque is not
saturated. Adjust gains. Maximize torque limit
set-up Pr5E. Correct encoder wires as per the
wiring diagram. Extend acceleration/deceleration
time. Alleviate load.
(1) Check the gain (the balance between the
position loop gain and the speed loop gain)
and the inertia ratio.
(2) Increase the set value in Pr26.
Set Pr26 to “0” in order to disable the
protection function.
Reset all the parameters.
If the error persists, the driver may have failed.
Replace it. Then, return it to the sales agent for
inspection (repair).
The driver may have failed. Replace it. Then,
return it to the sales agent for inspection (repair).
Check if limit switches, electric wires, and power
supply for CW/CCW overtravel inhibit input are
normal. Especially, check whether the power
supply for control signal (DC12 to 24V) rises
without delay. Check setting of Pr04 and correct
wiring.
The motor may have failed. Replace it. Then,
return it to the sales agent for inspection (repair).
The motor may have failed. Replace it. Then,
return it to the sales agent for inspection (repair).