Epson RC620 Safety And Installation page 43

Low Power Mode
The motor power is reduced in this mode.
Executing a power status change instruction will change to the restricted (low
power) status regardless of conditions of the safety door or operation mode. The
restricted (low power) status
possibility of peripheral equipment destruction or damage caused by careless
operation.
Dynamic Brake
The dynamic brake circuit includes relays that short the motor armatures. The
dynamic brake circuit is activated when there is an Emergency Stop input or when
any of the following errors is detected: encoder cable disconnection, motor
overload, irregular motor torque, motor speed error, servo error (positioning or
speed overflow), irregular CPU, memory check-sum error and overheat condition
inside the Motor Driver Module.
Encoder Cable Disconnection Error Detection
The dynamic brake circuit is activated when the Motor Encoder Signal cable is
disconnected.
Motor Overload Detection
The dynamic brake circuit is activated when the system detects that the load on the
motor has exceeded its capacity.
Irregular Motor Torque (out-of-control manipulator) Detection
The dynamic brake circuit is activated when irregularity with motor torque (motor
output) is detected (in which case the Manipulator is out of control).
Motor Speed Error Detection
The dynamic brake circuit is activated when the system detects that the motor is
running at incorrect speed.
Positioning Overflow -Servo Error- Detection
The dynamic brake circuit is activated when the system detects that the difference
between the Manipulator's actual position and commanded position exceeds the
margin of error allowed.
RC620 Safety and Installation Rev.8
ensures the
safety of the operator and reduces the
1. Safety
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