Stopping Methods; Alm (Servo Alarm) Signal - YASKAWA SGD7S Product Manual

11.2 Hard Wire Base Block (HWBB)

11.2.9 Stopping Methods

11.2.9 Stopping Methods

If the /HWBB1 or /HWBB2 signal turns OFF and the HWBB operates, the Servomotor will stop
according to the stop mode that is set for stopping the Servomotor when the servo turns OFF
(Pn001 = n.X). However, if the dynamic brake is enabled (Pn001 = n.0 or
n.1), observe the following precautions.

11.2.10 ALM (Servo Alarm) Signal

The ALM (Servo Alarm) signal is not output in the HWBB state.
11-8
 The dynamic brake is not a safety-related element. You must design the system so that a
hazardous condition does not occur even if the Servomotor coasts to a stop in the HWBB
state. Normally, we recommend that you use a sequence that returns to the HWBB state
after stopping for a reference.
 If the application frequently uses the HWBB, stopping with the dynamic brake may result in
the deterioration of elements in the SERVOPACK. To prevent internal elements from deterio-
rating, use a sequence in which the HWBB state is returned to after the Servomotor has
come to a stop.
CAUTION