Velocity Error Over: A4; Home Position Undefiend: A5; Brake Error: A8 - NSK MEGATORQUE M-ESB-YSB2020AB300 User Manual

Esb driver unit motor system
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u Velocity Error Over: A4
(1) Velocity of Motor has reached to the limit
due to external disturbance.
(2) Velocity of Motor has reached to the limit
due to overshooting.
(3) Motor tends to vibrate due to poor servo
tuning.
(4) Motor is out of control.
u Home Position Undefined: A5
(1) An absolute positioning command is
inputted after the power is turned on before
the Home position is defined.
(2) Home position of the absolute position
sensor is lost because of a change in the
position scale setting
u Brake Error: A8
(1) Did not input the brake-off signal (CLCN
signal ON) before execution of Jog, or the
brake-off action is lifted (CLCN signal OFF)
during Jog.
(2) The System detected pulse train signal
while the brake-off signal (CLCN) being
OFF, or the brake-off signal (CLCN) was
OFF while pulse train was being inputted.
(3) The System detected an analog command
while the brake-off signal (CLCN) being
OFF, or the brake-off signal (CLCN) was
OFF while an analog command was being
inputted.
(4) The DC command for velocity/torque
control mode is inputted while the brake-off
signal (CLCN) being OFF, or the brake-off
signal (CLCN) was OFF while an operation
by the DC command.
Cause
Cause
Cause
— 10-11 —
10.3. Cause and Remedy of Alarm
Remedy
· Clear the alarm.
· Reduce the setting of acceleration rate.
· Reduce the rotational speed.
· Tune the Motor properly.
· Confirm the PA data for abnormality.
· Replace the Driver Unit referring to "Appendix 4.
How to Replace ESB Driver Unit."
Remedy
· Complete Home Return.
· Clear alarm.
· Turn on the power again.
Remedy
· Activate the CLCN signal ON (Brake-off) before
Jog, or maintain the CLCN signal ON during Jog.
· Activate the CLCN signal ON (Brake-off) before
inputting a pulse train command, or keep the CLCN
signal ON while inputting a pulse train command.
· Activate the CLCN signal ON (Brake-off) before
inputting an analog command, or keep the CLCN
signal ON while inputting an analog command.
· Make the CLCN signal (Brake-off) ON before input
of DC command, or maintain the CLCN signal ON
while operation caused by the DC command.

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Troubleshooting

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