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D.4 Safe Disable Input Function
610
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
Figure D.14
Figure D.14 Safe Disable Function Wiring Example (Source Mode) (CIMR-UB
)
■
Disabling and Enabling the Drive Output (“Safe Torque Off”)
illustrates a Safe Disable input operation example.
Figure D.15
Figure D.15 Safe Disable Operation
Entering the “Safe Torque Off” 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 Off” state can only be achieved using the Safe Disable function. Removing the Run
command stops the drive and shuts the output off (baseblock), but does not create a “Safe Torque Off” 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 Disable function can only be deactivated when a Run command is not active.
When Safe Disable was activated during stop, normal operation can be resumed by simply turning on both Safe Disable
inputs (i.e., by deactivating “Safe Torque Off”).
When Safe Disable was activated during run, first the Run command has to be removed and then the Safe Disable inputs
have to be turned on before the drive can be restarted.
24 Vdc
Power Module
Safety
Outputs
Motor
Gate Block 2
Gate Block 1
Control
Circuit
Main Power
H1
H2
HC
U1000
Slide Switch S6
Jumper S3
Setting:
SOURCE
>=1
DM+
DM-
Feedback
Safety Relay or PLC
with safety functionality
N.C.
N.O.
H1, H2 Input
Drive Output
ON (Safe Disable off)
Normal operation
OFF (Safe Disable activated)
Safe Torque-Off
Run Command
Run
Stop
Baseblock (Not Safe!)
Output
Frequency
Motor coasts
to stop
Drive is ready for
operation
SIEP_C710636_02B_1_0.book 610 ページ 2015年11月25日 水曜日 午後4時56分