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3. SIGNALS AND WIRING
3.5 Alarm occurrence timing chart
CAUTION
When an alarm has occurred, remove its cause, make sure that the operation
signal is not being input, ensure safety, and reset the alarm before restarting
operation.
As soon as an alarm occurs, turn off Servo-on (SON) and power off the main
circuit.
When an alarm occurs in the servo amplifier, the base circuit is shut off and the servo motor is coated to a
stop. Switch off the main circuit power supply in the external sequence. To reset the alarm, switch the
control circuit power supply from off to on, press the "SET" button on the current alarm screen, or turn
the reset (RES) from off to on. However, the alarm cannot be reset unless its cause is removed.
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
1s
Brake operation
50ms or more
60ms or more
Alarm occurs.
Remove cause of trouble.
Brake operation
Power off
Power on
Valid
Invalid
Main circuit
control circuit
power supply
Base circuit
Dynamic brake
Servo-on
(SON)
Reset
(RES)
Ready
(RD)
Trouble
(ALM)
(Note)
about
Note. Shut off the main circuit power as soon as an alarm occurs.
(1) Overcurrent, overload 1 or overload 2
If operation is repeated by switching control circuit power off, then on to reset the overcurrent (AL.32),
overload 1 (AL.50) or overload 2 (AL.51) alarm after its occurrence, without removing its cause, the
servo amplifier and servo motor may become faulty due to temperature rise. Securely remove the
cause of the alarm and also allow about 30 minutes for cooling before resuming operation.
(2) Regenerative error
If operation is repeated by switching control circuit power off, then on to reset the regenerative (AL.30)
alarm after its occurrence, the external regenerative resistor will generate heat, resulting in an
accident.
(3) Instantaneous power failure
Undervoltage (AL.10) occurs when the input power is in either of the following statuses.
A power failure of the control circuit power supply continues for 60ms or longer and the control
circuit is not completely off.
The bus voltage dropped to 200VDC or less for the MR-J2S- A, or to 158VDC or less for the MR-
J2S- A1.
(4) In position control mode (incremental)
When an alarm occurs, the home position is lost. When resuming operation after deactivating the
alarm, make a home position return.
Summary of Contents for MR-J2S-*A
Page 13: ...WWW NNC IR A 12 MEMO ...
Page 117: ...WWW NNC IR 3 70 3 SIGNALS AND WIRING MEMO ...
Page 185: ...WWW NNC IR 7 12 7 GENERAL GAIN ADJUSTMENT MEMO ...
Page 195: ...WWW NNC IR 8 10 8 SPECIAL ADJUSTMENT FUNCTIONS MEMO ...
Page 197: ...WWW NNC IR 9 2 9 INSPECTION MEMO ...
Page 221: ...WWW NNC IR 11 10 11 OUTLINE DIMENSION DRAWINGS MEMO ...
Page 293: ...WWW NNC IR 13 64 13 OPTIONS AND AUXILIARY EQUIPMENT MEMO ...
Page 321: ...WWW NNC IR 14 28 14 COMMUNICATION FUNCTIONS MEMO ...
Page 389: ...WWW NNC IR 15 68 15 ABSOLUTE POSITION DETECTION SYSTEM MEMO ...