NSK EDD Megatorque Motor - List of Alarms and Warnings

11. Alarm and Warning
— 11-5 —
11.2. List of Alarm and warning
11.2.1. Normal State
 The table below shows the condition of the System when the input SVON (Servo on) is activated and the
System is ready for the operation command, the System.
 For the execution of operation, clear the input STP (Stop).
Table 11-3: The condition for command acceptance
POWER
LED
7-seg.
LED
Output
DRDY
Output
WRN
Output
OTPA
and
OTMA
Output
SVST
Motor condition
Green

Close
Closed
Closed
Closed
Servo-on
！
Caution : The outputs DRDY (Driver ready), WRN (Warning) and OTPA/OTPM
(Travel limit) are normally closed and they open for reporting abnormality.
 The shipping set of the outputs WRM and OTPA/OTMA is negative logic.
 If the Motor does not move even no alarm or warning is reported, the System may be in the condition
shown in “Table 11-4: condition when the Motor does not move even in normal state.”
 In the condition shown in the table below, the Motor gets in the servo-off state and the dynamic
brake is functioning to brake the Motor.
 When the initialization of the CPU takes longer than 10 seconds at the power-on, the control
circuit is not functioning normally. Refer to “11.3.1. CPU Error” for the cause and remedy.
Table 11-4: condition when the Motor does not move even in normal state
POWER
LED
7-seg.
LED
Output
DRDY
Output
WRN
Output
OTPA
and
OTMA
Output
SVST
Motor
condition
System
condition
Cause
Remedy
Off
Off
Open
Open
Open
Open
Servo-off
The power is
not turned on.
The power is not
turned on.
Turn on the
power
Orange
Off
Open
Open
Open
Open
Servo-off
Initializing
CPU
The power is on, but
the CPU is being
initialized.
Wait for about 3
seconds
Green

Closed
Closed
Closed
Open
Servo-off
Servo-off
The input SVON is
not activated.
Activate the
input SVON.
The input SVON
is on, but the servo
is not on yet.
Wait until the
output SVST
closes.