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English
17 - 4 Torque Over Load
When the Load Monitor LED lights 4 or more LED's (3 Green LED's and 1 of more yellow LED's) an over-load
condition exists.
During a motor overload period, the following will occurs:
(1) Warning LED (WARNING) will blinks.
(2) Warning Code " A3 " is displayed on the Digital Speed Indicator .
(3) Warning Signal is output to the Pin No.20 (Warning) of External Input / Output Connec
tor A .
Overload operation is considered a short-term operation mode. The allowable operation time depends on the
number of lighted LED's on the Load Monitor LED (LOAD).
(1) Load Monitor LED 4 LED's (Green LED 3, Yellow LED 1) : 30 Seconds
(2) Load Monitor LED 5 LED's (Green LED 3, Yellow LED 2) : 10 Seconds
(3) Load Monitor LED 6 LED's (Green LED 3, Yellow LED 2, Red LED 1) : 5 Seconds
When the allowabl
e time is exceeded the motor will stop and the following occurs:
(1) Error LED lights.
(2) Error Code " E8 " is displayed on the Digital Speed Indicator .
(3) Error Signal is output to Pin No. 8 (ERROR) of the External Input / Output Connector A .
* Set the parameter
, can be Change the Error Output Mode of the Error Signal for an Open or Closed
state. (Refer to P90 " 18 - 4 ①
Setting of Error Output Mode " section.)
CAUTION
・If when using the External Input / Output Connector A / B and External Monitoring, please check
and resolve source of the problem whenever an Error Code is displayed on the Digital Speed
Indicator.
・When an error occurs due to internal damage of the CONTROLLER, the Error Signal can not be
reset. Please send the Motor spindle and CONTROLLER to a NAKANISHI dealer for repair.
Error Code " EF1 "
・The FAN (80 Square Type) located on the rear of the Control Panel of the CONTROLLER has
malfunctioned and stopped. The Protect Function of the CONTROLLER is operating and motor /
spindle has stopped. The FAN (80 Square Type) needs to be replaced.
This FAN can be replaced by the customer (Refer to P96 " 22. MAINTENANCE ").
・If the FAN has been stopped due to a malfunction, the motor / spindle can be temporarily
operated by setting Parameter
to , until the FAN (80 Square Type) has beed replaced
（Refer to P93 " 18 - 4 Temporary Motor / Spindle Operation if FAN has Stopped (80 Square
Type) " section).
Error Code " EF2 "
The FAN (40 Square Type) located on the control board inside of the CONTROLLER has
malfunctioned and stopped.
Immediate FAN replacement is necessary and it CANNOT be replaced by the customer. Return to
a NAKANISHI dealer for service.
CAUTION
If you constantly, operate the system in an overload condition, even for short periods of time, the
CONTROLLER will overheat and damage to the control, motor and spindle are possible.
NAKANISHI recommends only continuous duty operation (LOAD LED's with 3 LED's lit) : Torque
Load Monitor (LOAD) Voltage should be less than DC+5V.
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