Alarms and warnings
−32−
7.9 Holding a load at motor standstill
If the "slight position-keeping selection" parameter is set to ON (enable), the holding torque is somewhat generated
when the motor stops (slight position-keeping torque).
The factory setting is OFF (disable). Refer to p.24 or p.26 for how to change the parameter.
z
Slight position-keeping torque
Approximately 50% of the rated torque is generated according to the angular variation of the motor output shaft
(gure below).
Note
•
Do not continuously apply a load exceeding the slight position-keeping torque. Continuing to
rotate the motor output shaft by the external force may cause damage to the motor.
•
Do not use for the purpose of anti-drop mechanism in the event of a power outage. If the power
supply to the driver is turned off, the holding force of the motor may lose, causing the load to fall.
100%
Slight position-keeping torque
Angle variation [deg]
(motor output shaft)
About 50%
About –50%
About 60°
Slight position-keeping torque characteristic
About 60°
8 Alarms and warnings
The driver provides alarms that are designed to protect the driver from overheating, poor connection, error in
operation, etc. (protective functions), as well as warnings that are output before the corresponding alarms generate
(warning functions).
8.1 Alarms
If a protective function is activated and an alarm is generated, the motor will coast to a stop, and then the holding
power of the motor output shaft is lost. At the same time, the alarm code is displayed. The alarm type can be checked
by the alarm code.
Note
•
Cycle the power to reset the overcurrent and EEPROM error alarms. When cycling the power,
turn off the power and wait for minimum 1 minute before doing so. If the product does not
operate properly after the power is cycled, the internal circuit may be damaged. Contact your
nearest Oriental Motor branch or sales ofce.
•
The motor stops instantaneously at the time of external stop (
AL6E
). After the motor is stopped,
the holding power of the motor output shaft is lost.
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