Epson RC90 User Manual page 33

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.
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, junction error, or open fault
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.
RC90 (EPSON RC+ 7.0) Rev.4
Setup & Operation 2. Part Names and Functions
17