Protection Functions; Dynamic Brake Function; Error Detection Function - YASKAWA SGM Series User Manual

Application

5.4.2 Error Detection Function

5.4 Protection Functions

5.4.1 Dynamic Brake Function

5.4.2 Error Detection Function
Alarm Code SVALM Output
0j
OFF
5
1j OFF
30 OFF
4j
OFF
51
OFF
7j OFF
Bj
OFF
Cj OFF
8j OFF
9j
ON
D0 OFF
Ej OFF
Fj
OFF
99 ON
ON: Output transistor is ON
OFF: Output transistor is OFF
The SERVOPACK is equipped with various functions to protect the driver and motor from damage.
The SERVOPACK is equipped with a dynamic brake for emergency stops. The brake is operated
for any of the following conditions.
D When an alarm occurs (error detection)
D When the servo receives SV_OFF command
D When power is turned OFF
Table. 5.2 shows the error detection function in the SERVOPACK. Alarm details can be checked
by MECHATROLINK communication and SVALM output.
Table 5.2 Error Detection Function
Error Detection Function
User constant error
Absolute data error
Overcurrent
Ground detection
Regenerative error
Overvoltage
Undervoltage detection
Overspeed detection
Overload
Heat sink overheating
detection
Hardware error
Phase error detection
Overrun detection
Broken PG signal line
Encoder alarm
Warning
Position error overflow
Communication error
Power supply line not
connected
Instantaneous power loss
error
No alarm
Description
An absolute or parameter (user constant) error.
S Overcurrent flowed through the main circuit.
S Overcurrent flows to the main circuits and Servomotor
power lines are grounded.
A regenerative resistor circuit malfunctioned.
DC voltage is abnormal in the main circuit.
Motor speed exceeded the maximum speed.
S The load torque for the motor and SERVOPACK was ex-
ceeded.
S SERVOPACK heat sink overheated.
The hardware circuit is abnormal.
S An overrun was caused by the motor or the PG wiring in-
correct.
S Noise in encoder wiring
Absolute encoder alarm.
A user constant or command error.
The number of pulses accumuated in the error counter
exceeded the preset value.
A synchronization error or communications error.
S One phase of the main circuit power supply not connected.
S Power loss occurred during operation.
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