YASKAWA S Series User Manual page 89

Application
5.4.2 Error Detection Function
5.4 Protection Functions
The SERVOPACK is equipped with various functions to protect the driver and motor from damage.
5.4.1 Dynamic Brake Function
5.4.2 Error Detection Function
Alarm Code SVALM Output
OE OFF
l O OFF
30 OFF
OFF
4❑
51 OFF
7E1 OFF
B❑ OFF
OFF
C E
OFF
8E1
ON
9❑
DO OFF
ED OFF
FE OFF
99 ON
ON : O u t p u t transistor is ON
OFF : Output transistor is OFF
The SERVOPACK is equipped with a dynamic brake for emergency stops. The brake is operated
for any of the following conditions.
• W h e n an alarm occurs (error 'detection)
• W h e n the servo receives SV_OFF command
• W h e n power is turned OFF
Table. 5.2 shows the error detection function in the SERVOPACK. Alarm details can be checked
by M E C H AT R O L I N K communication and S VA L M output.
Table 5.2 E r r o r 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.
• Overcurrent flowed through the main circuit.
• 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.
• The load torque for the motor and SERVOPACK was ex-
ceeded.
• SERVOPACK heat sink overheated.
The hardware circuit is abnormal.
• A n overrun was caused by the motor or the PG wiring in-
correct.
• 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.
• One phase of the main circuit power supply not connected.
• Power loss occurred during operation.
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