NSK MEGATHRUST ESA-LYB2T15-21, Руководство пользователя

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— 14-4 —
14.2. Description of Alarm
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Caution : The DRDY output is normally closed. It opens on abnormal condition.
14.2.1. Normal State
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When the Motor does not operate even in normal state, following causes should be considered as
shown in Table 14-2.
Table 14-2
Status Motor condition DRDY Cause Remedy
Power-off Servo-OFF open Power is not supplied. Turn on power.
CPU Initializing Servo-OFF open Initializing the CPU.
Wait for the CPU to be
initialized.
SVON Input OFF Servo-OFF closed SVON input is not active. Activate the SVON input.
14.2.2. Alarms Related to Power Amplifier
14.2.2.1. Heat Sink Over Temperature
[Output] DRDY: Open
[TA] P0 > Over Heat
[LED] P0
[Motor Condition] Servo-OFF
Table 14-3: Cause and Remedy: Heat sink over temperature
Cause Remedy
(1) Duty cycles of the Motor is too high.
(2) Excessive load is applied. ·
Reduce the load and/or operation duty. Readjust
acceleration/deceleration.
(Stop operation, air-cool the Driver Unit.)
(3) Ambient temperature is above 50°C.
(4) Heat sink temperature exceeds 90°C
due to continued heavy duty.
·
Check surrounding condition of the Driver Unit.
·
Stop the operation and air-cool the Motor and driver
Unit. Then check followings.
à
Whether the duty cycle is too high.
à
Whether excessive load is applied.
·
If no troubles are found in the above check and this
alarm occurs frequently, contact NSK.
(5) Defective PCB.
(As soon as the control power is turned
on, the alarm is activated.)
·
Replace Driver Unit.
(Refer to “Appendix 4. How to Replace ESA13 Driver
Unit”.)
Notes: (1) Stop operation immediately.
(2) Even the alarm goes off, it is activated again when the thermal sensor is still on.
• Take a time to cool the Motor and Driver Unit.
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