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Protection System
14
1
Operating Condition Monitoring
（
）
Constant monitoring of the control unit, motor, spindle and the pressure of the cooling air to
detect undesired operating conditions. This system helps prevent errors that will result in unsafe
operating conditions.
・Motor is stopped.
・ERROR Lamp (ERROR) A will flash.
・The error Codes (listed in Table1) will be displayed on the Digital Speed Indicator ⑭.
・Trip Signal is output to External Input/Output Connector CN2: Pin8(ERR).
2
ERROR Reset
（
）
There are 2 methods for resetting the control unit after an ERROR.
・Manual mode, push START Switch ⑨ on the front panel to reset.
・Auto mode, switch off (Open) Pin14 (START) of External Input/Output Connector CN2 to
reset →ON (Closed) Start to rotate.
Display Code
Detector Function
E1
Excessive Current
E3
Motor Sensor
E4
Thermal Protection
E7
Low Air Pressure
E8
Excessive Load
EA
External Start UP Error
EE
Emergency Stop Error
EH
Over Speed
3
Over Load Characteristics
（
）
6 LED load monitor allows the operator to assess load conditions easily. Continuous Duty (3
Green LEDs), Intermittent Duty (2 Yellow LEDs), Overload (1 Red LED). If the RED LED is lit for
more than 15 seconds, the overload protection system will activate and interrupt power to the
motor.
When using E800Z with no load, LOAD Monitor Lamp (Green LED) may flash. This is not an
error. (EM801, EM805, NR3080, NRA5080)
・Error Code E8 is displayed on Motor Speed Indicator (SPEED) ⑭.
・Error Lamp (ERROR) A will flash.
・Error Signal is output to Pin8 (ERR) of External Input/Output Connector CN2.
！ CAUTION
If the system is operated in overload repeatedly and for a long period of time, this will
cause damage to E800Z, due to overheating of the control unit, motor and spindle.
Recommended usage under load is with 3 or less Green LEDs lit: Continuous
Operation Use Area) as much as possible.
Table ２
Excessive Current to Motor.
Motor Connector is disconnected.
Over 90℃
Air pressure for motor cooling is too low.
Continuous excessive load.
AUTO control mode, Motor Speed Control Voltage has been supplied before Power Source is ON.
Input Emergency Stop Signal.
Excessive Motor Speed(85,000min
Error
-1
)
18
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