3. Operation
236
[10] Brake Forcible Release (BKRL)
Output
PIO signal
BKRL
The brake can be released while BKRL signal is turned ON.
For the actuator equipped with a brake, the brake can be controlled by turning the servo
ON/OFF, however, a release of the brake may be necessary in the case of installing the unit to
a system so the slider or rod can be moved by hand.
This operation can be performed not only by the brake release switch on the front panel of the
controller, but also by the brake release signal BKRL.
Warning: (1) Take sufficient care to release the brake. Inappropriate brake release may cause
people to be injured and/or the actuator, the work and/or the machine to be damaged.
(2) After the brake is released, always make the brake applied again. Any operation with
the brake remaining released is extremely dangerous. The slider or rod may drop to
cause people to be injured and/or the actuator, the work and/or the machine to be
damaged.
[11] Overload Alarm/Light Error Alarm (*OVLW/*ALML)
Output
PIO signal
*OVLW/*ALML
Use this with changing the setting in Parameter No.151.
Setting Parameter No.151 to “0” changes to the overload warning output, and it turns OFF
when the motor temperature exceeds the rate set in Parameter No.143 “Overload Level Ratio”.
This signal will be ON as long as the motor temperature does not exceed the warning level.
Setting Parameter No.151 to “1” changes to the light failure alarm output, and it turns OFF
when a message level alarm is generated. This signal will be ON as long as the message level
alarm is not issued.
[12] Datum Position Movement (RSTR, REND)
Input Output
PIO signal
RSTR REND
RSTR Signal is a command signal to move
(Note 1)
to the datum position* set at any point.
This command is processed at the startup (ON-edge) and operation to the datum position is
conducted.
Once the movement to the datum position is complete, output REND (Datum Position
Movement Complete) Signal turns ON
(Note 2)
.
For the Absolute Type actuators with no home-return operation conducted, have the position
management of the host controller conducted at this point.
* Set it in Parameter No. 167 only for the Absolute Type actuators. For the incremental type
actuator, the home position of the actuator is the datum position.
Note 1: Movement to the datum position is made under the following conditions.
Position Pulse train datum position (position set in Parameter No. 167)
Speed PIO jog speed (speed set in Parameter No. 26)
Note 2 REND Signal turns off under the following conditions.
1) RSTR Signal is ON
2) When servo is OFF
3) ON-edge is detected due to one of the signals of Compulsory Stop (CSTP),
Home Return (HOME) or Deviation Counter Clear (DCLR).
4) Mode changed from AUTO to MANU
Caution :
(1) An alarm will be generated when RSTR Signal is turned ON while HEND is OFF.
(2)
An alarm for DCLR Signal detection in the datum position movement command will be generated if
turning RSTR Signal is turned ON while DCLR Signal is ON.
3.3.2
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