6.11.8 Overtravel Operation by Mode
Operation Mode Operation
PROFIdrive Profile Posi-
tion mode
n If an overtravel signal is input, the positioning operation
to the current target position will be canceled and, after
the motor stops, target reached in statusword will be
reset.
n A positioning operation (return operation) is started only
when a movement reference to a target position in the
opposite direction from the overtravel signal is specified
in the current Position Actual Value (e.g., a negative
movement reference if the P-OT signal is input).
PROFIdrive Profile
Velocity mode
n During overtravel, the motor is operated only when a
speed in the direction opposite from the overtravel signal
is specified (e.g., a negative target speed when the P-OT
signal is input).
Profile Torque Mode
n During overtravel, torque is applied only when a torque in
the direction opposite from the overtravel signal is speci-
fied (e.g., a negative torque when the P-OT signal is
input).
6.12 Holding Brake
6.12.1 Overview
A holding brake is used to hold the position of the moving part of the machine when the
SERVOPACK is turned OFF so that moving part does not move due to gravity or an
external force. You can use the brake that is built into a Servomotor with a Brake, or you
can provide one on the machine.
The holding brake is used in the following cases.
l l
Vertical Axis
Servomotor
Holding brake
Prevents the moving part from falling due
to gravity when the power supply is OFF.
Moving part of machine
Shaft with External Force Applied
External force
Moving part of machine
Servomotor
Holding brake
Prevents the moving part from moving
due to an external force.
Fig. 118: Holding Brake - Use
The brake built into a Servomotor with a Brake is a de-energization
brake. It is used only to hold the Servomotor and cannot be used for
braking. Use the holding brake only to hold a Servomotor that is already
stopped.
Sigma-7 Series SERVOPACKs
Basic Functions That Require Setting before Operation
Holding Brake > Overview
| | PROFINET Communications - SIEP YEUOC7P 02A Revision 0 | en | 167
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