YASKAWA L1000A Technical Manual page 496

D.4 Safe Disable Input Function
Entering the "Safe Torque Off" State
Note: Terminals H1, H2, DM+, and DM- on 600 V class models are designed to the functionality, but are not certified to IEC/EN
61800-5-2, ISO/EN 13849 Cat.3, IEC/EN 61508 SIL2, Insulation coordination: class 1.
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 Up/Down
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
Note: Terminals H1, H2, DM+, and DM- on 600 V class models are designed to the functionality, but are not certified to IEC/EN
61800-5-2, ISO/EN 13849 Cat.3, IEC/EN 61508 SIL2, Insulation coordination: class 1.
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 of 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.
Safe Disable Monitor Output Function and Digital Operator Display
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Note: Terminals H1, H2, DM+, and DM- on 600 V class models are designed to the functionality, but are not certified to IEC/EN
61800-5-2, ISO/EN 13849 Cat. 3, IEC/EN 61508 SIL2, Insulation coordination: class 1.
The table below explains the drive output and Safe Disable monitor state depending on the Safe Disable inputs.
Table D.14 Drive Output and Safe Disable Monitor State depending on the Safe Disable Inputs
Safe Disable Input
Drive Model
Input 1, H1-HC Input 2, H2-HC
Off
On
CIMR-LA
Off
On
Off
On
CIMR-LF
Off
On
Safe Disable Status Monitor
Note: Terminals H1, H2, DM+, and DM- on 600 V class models are designed to the functionality, but are not certified to IEC/EN
61800-5-2, ISO/EN 13849 Cat. 3, IEC/EN 61508 SIL2, Insulation coordination: class 1.
With the Safe Disable monitor output (terminals DM+ and DM-), the drive provides a safety status feedback signal. This
signal should be read by the device that controls the Safe Disable inputs (PLC or a safety relay) in order to prohibit
leaving the "Safe Torque Off" status in case the safety circuit malfunctions. Refer to the instruction manual of the safety
device for details on this function.
496
Safe Disable Monitor,
EDM (DM+, DM-)
Off Off
Off On
On On
On On
Off On
Off Off
On Off
On Off
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
Safe Disable Monitor,
H2- = 58
On Safely disabled, "Safe Torque Off"
On Safely disabled, "Safe Torque Off"
On Safely disabled, "Safe Torque Off"
Off Baseblock, ready for operation
On Safely disabled, "Safe Torque Off"
On Safely disabled, "Safe Torque Off"
On Safely disabled, "Safe Torque Off"
Off Baseblock, ready for operation
Drive Output Digital Operator Display
Hbb (flashes)
HbbF (flashes)
HbbF (flashes)
Normal display
Hbb (flashes)
HbbF (flashes)
HbbF (flashes)
Normal display