• DOK-DIAX02-DDS02.1*ANA-ANW1-EN-E1,44 • 12.96
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7.2. Safety lockout
(drive interlock open)
Production facilities, transfer lines and machine tools often consist of
physically separate operational units such as machining stations, trans-
port, handling and storage systems.
Personnel often have to perform work in a danger zone on one of these
units while the other units on the machine are still running. If a person has
to enter the working area of an axis, this must first be stopped and
secured against involuntary start-up.
The safety lockout is such a feature intended to prevent an installed
motor starting up again in the presence of an error. It provides safe
shutdown of separate working areas in a machine or a plant.
Series DDS 2.1 drive controllers are equipped with a safety lockout to
stop a servo axis starting up accidentally. When this lockout is activated,
the control electronics for the power output stage are disconnected from
the latter by means of a relay contact.
Risk of injury or damage due to uncontrolled axis movements!
The safety lockout is NOT intended to stop a moving axis.
When the lockout is active, the drives can no longer be oper-
ated via the NC control or the drive controller. The motor torque
signal is immediately disabled and the axis can no longer be
brought to a halt under controlled conditions.
Vertical axes must always be immobilized using a mechanical
brake before the safety lockout is activated.
For motors with holding brakes, this function is executed by
cancelling the controller enable signal. Only then may the
safety lockout be switched on.
7. Commissioning the functions of the digital AC servo drive
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