Oriental motor BLVM620K-GFS - Protective Functions; Alarm Codes and Remedial Actions

Protective functions
−64−
13 Protective functions
When the driver protective function is activated to generate an alarm, the ALARM-OUT1 output is turned OFF. In the
case of the standard type product, the motor coasts to a stop, and the motor output shaft is in a free-run state (a state
of rotating manually). In the case of the electromagnetic brake type product, on the other hand, the motor stops
instantaneously and the electromagnetic brake activates to hold the shaft in position.
At the same time, the ALARM LED will start blinking. The alarm type can be checked by counting the number of times
the ALARM LED blinks.
Blinking pattern example: Sensor error (number of blinks: 3)
0.3s0.3s 1.5s
123 123
To reset an alarm, be sure to remove the cause of the alarm before performing one of the following operations:
•
Turn the ALARM-RESET input ON (keep it ON for 10 ms or more) and then OFF. (Refer to p.27 for details.)
•
Turn on the main power supply again.
Turn on the control power supply again when connecting it.
Note
•
An alarm cannot be reset if the FWD input or REV input is being ON. Be sure to stop the motor before
resetting any alarm.
•
Alarms caused by damage to the motor or driver itself cannot be reset using the method explained
above. Contact your nearest Oriental Motor sales oce.
•
Make sure the ALARM-RESET input remains ON for at least 10 ms. If the ON period is too short, the alarm
may not be reset.
•
The undervoltage alarm is released automatically when the driver main power supply voltage exceeds
the undervoltage detection level. If the FWD input or REV input is being ON, the motor will rotate
concurrently with releasing the alarm.
•
If an external stop alarm is generated, the motor stops instantaneously.

Alarm lists
Number
of ALARM
LED
blinks
Alarm type Cause Remedial action
Reset using
the ALARM-
RESET input
2 Overload
A load exceeding the rated torque was
applied to the motor for 5 seconds or more.
•
Decrease a load.
•
Reconsider the operating conditions such
as acceleration/deceleration time.
Possible
3
Sensor error
The motor sensor signal line was
disconnected or the motor signal connector
came o during operation.
Check the connection between the driver
and motor.
Sensor error at
power-on
The motor sensor signal line was
disconnected or the motor signal connector
came o before the main power supply was
turned on.
4 Overvoltage
•
The main power supply voltage exceeded
the overvoltage detection level.
[Detection level]
BLV510
,
BLV620
: Approximately 40 VDC
BLV640
: Approximately 72 VDC
•
Sudden starting/stopping of a large inertia
load was performed.
•
Check the voltage of the main power
supply.
•
If the alarm is generated during
operation, decrease a load or increase the
acceleration time and deceleration time.
•
If the alarm is generated in acceleration,
set the speed response to the regenerative
power suppression mode. (p.35)
•
If the alarm is generated when the motor
stops, set the STOP-MODE to instantaneous
stop.
5 Undervoltage
The main power supply voltage dropped
below the undervoltage detection level.
[Detection level]
BLV510
: Approximately 18 VDC
BLV620
: Approximately 10 VDC
BLV640
: Approximately 20 VDC
•
Check the voltage of the main power
supply.
•
Check the wiring of the power supply
cable.