YASKAWA L1000A Series, Техническое руководство, Страница: 407 / 430

D.4 Safe Disable Input Function
M a i n P o w e r
F ig u r e D .10 S a f e D is a b le F u n c tio n W irin g E x a m p le ( S o u r c e M ode)
■ Disabling and Enabling the Drive Output (“Safe Torque Off”)
Figure D.11 illustrates a Safe Disable input operation example.
M o t o r c o a s t s
O u t p u t t o s t o p
Entering the “Safe Torque O ff” State
Whenever either one Safe Disable input or both inputs open, the motor torque is shut off by switching off the drive
output. If the motor was running before the Safe Disable inputs opened, it will coast to stop, regardless of the stopping
method set in parameter b1-03.
Notice that the “Safe Torque O ff’ state can only be achieved using the Safe Disable function. Removing the Up/Down
command stops the drive and shuts the output off (baseblock), but does not create a “Safe Torque O ff’ status.
Note: To avoid an uncontrolled stop during normal operation, make sure that the Safe Disable inputs are opened first when the motor
has completely stopped.
Returning to Normal Operation after Safe Disable
The Safe Torque-Off state can be left by simply closing both Safe-Disable inputs.
If the Up/Down command is issued before the Safe-Disable inputs are closed, then the drive operation depends on the
setting o f parameter L8-88.
• If L8-88 is set to 0, the Up/Down command needs to be cycled in order to start the motor.
• If L8-88 is set to 1 (default), the drive will start the motor immediately when the Safe Torque-Off mode is left, i.e., the
Safe Disable inputs are enabled.
Additionally when L8-88 is set to 1, then parameter S6-16 (Restart after Baseblock Selection) can be used to determine
how the drive behaves when the Safe-Disable inputs are opened and closed while the Up/Down command is kept active.
When S6-16 is set to 0, the drive will not restart (default) and the Up/Down command needs to be cycled. When S6-16 is
set to 1, then the drive will restart as soon as the Safe-Disable inputs are closed.
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YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual 411
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