
230
YASKAWA
TOEPC7106170YB YASKAWA AC Drive GA500 Installation & Primary Operation
Figure 20.5 Safe Disable Operation
Switching from Usual Operation to “Safe Torque Off”
Turn OFF (open) safety input terminal H1 or H2 to enable the Safe Disable function.
When the Safe Disable function is enabled while the motor is operating, the drive output
and motor torque turn off and the motor always coasts to stop. The
b1-03 [Stopping
Method Selection]
setting does not have an effect on the stopping method.
The
“
Safe Torque Off
”
status is only possible with the Safe Disable function. Clear the
Run command to stop the drive. Turning off drive output (a baseblock condition) ≠
“
Safe
Torque Off
”
.
Note:
•
When it is necessary to ramp to stop the motor, do not turn off terminals H1 and H2 until the motor fully
stops. This will prevent the motor from coasting to stop during usual operation.
•
A maximum of 3 ms will elapse from when terminals H1 or H2 shut off until the drive switches to the
“
Safe
Torque Off
”
status. Set the OFF status for terminals H1 and H2 to hold for at least 3 ms. The drive may not be
able to switch to the
“
Safe Torque Off
”
status if terminals H1 and H2 are only open for less than 3 ms.
Going from “Safe Torque Off” to Usual Operation
The safety input will only release when there is no Run command.
•
During Stop
When the Safe Disable function is triggered during stop, close the circuit between
terminals H1-HC and H2-HC to disable
“
Safe Torque Off
”
. Enter the Run command
after the drive stops correctly.
•
During Run
If you trigger the Safe Disable function during run, clear the Run command, then close
the circuit between terminals H1-HC and H2-HC to disable
“
Safe Torque Off
”
. Enter
the Stop command, then enter the Run command when terminals H1 and H2 are
activated.
■
Safe Disable Monitor Output Function and Keypad Display
Refer to
for information about the relation between the input channel status,
Safety monitor output status, and drive output status.