YASKAWA A1000 Series Technical Manual

D.4 Safe Disable Input Function
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual 519
Standards Compliance
D
Figure D.8
Figure D.8 Safe Disable Function Wiring Example (Source Mode)
■ Disabling and Enabling the Drive Output (“Safe Torque Off”)
Figure D.9 illustrates the Safe Disable input operation.
Figure D.9
Figure D.9 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, then the motor 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
Safety
Outputs
Power Module
PN
M
Gate Block 2
Gate Block 1
Control
Circuit
Main Power
H1
H2
HC
Drive
Jumper S3
Setting:
SOURCE
>=1
DM+
DM-
Feedback
Safety Relay or PLC
with safety functionality
YEG
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
Run Command must be
released to deactivate
Safe Disable
Drive is ready for
operation

YASKAWA A1000 Series Specifications

General

Series	A1000
Type	AC Drive
Altitude	Up to 1000m without derating
Output Frequency	0-400 Hz
Control Method	V/f Control
Overload Capacity	150% for 60 seconds
Communication Options	Modbus, DeviceNet, Profibus, Ethernet/IP
Ambient Temperature	-10 to 50°C
Storage Temperature	-20 to 60°C
Humidity	5% to 95% (non-condensing)
Enclosure Rating	IP20
Horsepower	0.5 to 1000 HP
Power Range	0.4 - 630 kW (varies by voltage and model)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheat
Cooling Method	Fan Cooled
Safety	Safe Torque Off (STO)