Epson RC620 Safety And Installation page 44

1. Safety
Speed Overflow -Servo Error- Detection
The dynamic brake circuit is activated when the Manipulator's actual speed is
detected to mark an overflow (the actual speed is outside the nominal range) error.
CPU Irregularity Detection
Irregularity of CPU that controls the motor is detected by the watchdog timer.
The system CPU and the motor controlling CPU inside the Controller are also
designed to constantly check each other for any discrepancies. If a discrepancy is
detected, the dynamic brake circuit is activated.
Memory Check-sum Error Detection
The dynamic brake circuit is activated when a memory check-sum error is
detected.
Overheat Detection at the Motor Driver Module
The dynamic brake circuit is activated when the temperature of the power device
inside the Motor Driver module is above the nominal limit.
Relay Deposition Detection
The dynamic brake circuit is activated when relay deposition or junction error is
detected.
Over-Voltage Detection
The dynamic brake circuit is activated when the voltage of the Controller is above
the normal limit.
AC Power Supply Voltage Drop Detection
The dynamic brake circuit is activated when the drop of the power supply voltage
is detected.
Temperature Anomaly Detection
The temperature anomaly is detected.
Fan Malfunction Detection
Malfunction of the fan rotation speed is detected.
32 RC620 Safety and Installation Rev.8