YASKAWA
TOEPC71061752B GA500 Drive Installation & Primary Operation
193
•
n: Number of units to connect
•
Io
max
: Maximum current that the power supply can supply (234 mA for the internal power
supply)
•
I
MFDI
: Current consumed per MFDI (6 mA)
•
n
MFDI
: Maximum number of MFDIs that can be activated at the same time (maximum of 7-
channel)
•
I
sensor
: Current externally supplied for sensor power supply (maximum of 150 mA)
•
I
safety
: Current consumed by Safe Disable terminals H1 and H2 (12 mA)
Note:
Round the values to the first decimal place.
■
Enabling and Disabling the Drive Output (“Safe Torque Off”)
Refer to
for an example of drive operation when as the drive changes from the "Safe
Torque Off" status to usual operation.
Figure 18.5 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