Yaskawa i80M Connecting Manual - Manual (Page 313)

A5. PROTECTIVE CIRCUIT
A5. 1 PROTECTIVE FUNCTIONS
Servopack provides functions to protect the proper and motor from
Dynamic Brake Function
malfunctions.
Servopack incorporates a dynamic brake for emergency stop. This brake operates
Alarm (fault detection) occurs.
Servo ON command is opened.
Main power supply is turned off.
Normally, this dynamic brake is not applied while the motor stops.
(2) Trouble Detecting Functions
Table A5. 1 Trouble Detecting Functions
Trouble
Circuit Protector Trip
Regeneration Trouble
overspeed
Voltage Drop
overload
Heat Sink Overheat
open Phase
Overrun Prevention
CPU
Absolute Control
Error
Detection
flow in the main circuit (at 1. 2 times
min. inst max current, )
Circuit tripped
Regenerative circuit not activated in Servopack.
Excessively high DC voltage in the main circuit
(approx
Excessively large speed reference input.
Low DC voltage in the main circuit after power
(150 V or less.)
Overload condition of motor and
Overheat of heat sink 85 “C min.)
Any one phase open in three-phase power supply.
Wrong wiring of motor circuit or PG signal line.
Any error of CPU
Errors related to absolute encoder
when
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