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Sigma II User's Manual
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Speed reference drops below the setting level of Pn501.
Preset value for zero clamping
/P-CON (/ZCLAMP) input
Zero clamp is performed
Note: When the /ZCLAMP signal is allocated, the zero clamp operation will be used even for speed control
(Pn000.1 = 0).
5.4.4
Using the Holding Brake
The holding brake is used when a servodrive controls a vertical axis. In other words,
a servomotor with brake prevents the movable part from shifting due to the force of
gravity when system power goes OFF.
Note: The brake built into the servomotor SGMoH with brakes is a de–energization brake, which is used
only to hold and cannot be used for braking. Use the holding brake only to hold a stopped motor.
Brake torque is at least 120% of the rated motor torque.
n
Wiring Example
Use the servo amplifier contact output signal /BK and the brake power supply to
form a brake ON/OFF circuit. The following diagram shows a standard wiring
V-REF speed reference
Speed
Open (OFF)
Servomotor
Holding brake
Prevents the movable part from
shifting due to gravity when
system power goes OFF.
5-64
Chapter 5: Parameter Settings and Functions
Time
Closed
(ON)
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