Omron CJ1W-NC271 - 12-2009, Operation Manual

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Limit Input Operations
Section 7-5
Note (1) If the limit input signal inputs (Servo Drive's forward drive prohibited sig-
nal and reverse drive prohibited signal) are not allocated, the Servo Drive
will not stop the Servomotor when the signal is input, and the PCU will
also not detect limit inputs as errors. When using a PCU, always allocate
the Servo Drive's forward drive prohibited signal and reverse drive prohib-
ited signal to enable use of the limit input signals. (Refer to
6-4 Standard
Settings for Servo Drives Using MECHATROLINK .)
(2) Make sure that the limit input signals maintain a signal width no shorter
than the MECHATROLINK communications cycle. Input signals that are
shorter than the communications cycle cannot be detected by the PCU.
When using a G5-series Servo Drive, a G-series Servo Drive or a W-series
Servo Drive, the Servomotor's stop operation at the Servo Drive when a limit
input signal is input or a software limit is reached is set in the Servo Parame-
ters for limit input operations.
When using a SMARTSTEP Junior Servo Drive, the Servo is locked after
decelerating to a stop with the maximum Servomotor torque. The following
function cannot be used.
Servo Parameters G5-series Limit Input Parameters
Pn505 is used to set the stop operation of the Servomotor when a for-
ward/reverse rotation limit is input or a forward/reverse software limit is
reached. The parameter size of Pn505 is the value to be specified when trans-
ferring the Servo Parameter Pn505 including the above settings.
The following table shows the Servomotor stop operations using Pn505 set-
tings.
Note (1) If an operation command in the drive prohibited direction is received
when the torque command of the drive prohibited direction is disabled,
the Servomotor will not operate in the drive-prohibited direction, but the
position deviation will accumulate because the position command is en-
abled. If drive prohibition is detected, stop the operation command from
Parameter
No.
Parameter name Unit Setting
range
Parameter
size
Default
setting
Pn505 Stop selection for
drive prohibition
input --- 0 to 2 2 0
Pn511 Emergency stop
torque % 0 to 500 2 0
Parameter
No.
Setting During
deceleration
After stopping Deviation counter
Pn505 0 Dynamic brake Disables torque
command in drive
prohibited direction Cleared while
decelerating with
dynamic brake.
Retained after
stopping.
1 Disables torque Disables torque
command in drive
prohibited direction Cleared while
decelerating.
Retained after
stopping.
2 Emergency stop
torque (Pn511) Servo lock Retained while
decelerating,
cleared upon com-
pletion of decelera-
tion, and retained
after stopping.