Yaskawa MP2000 Series: Built-in SVB or SVB-01 Motion Module - Manual (Page 418)

11.1 Controlling Vertical Axes
11.1.1 Holding Brake Function of the SERVOPACK
11-3
Utility Functions
11.1 Controlling Vertical Axes
This section explains connection methods and parameter settings required to use the SERVOPACK to control a vertical
axis.
11.1.1 Holding Brake Function of the SERVOPACK
When using a SERVOPACK to control a vertical axis or an axis to which an external force is being applied, a Servomo-
tor with a brake must be used to prevent the axis from dropping or moving due to gravity or the external force when the
system power is turned OFF.
The holding brake of the Servomotor is controlled through the brake interlock output (/BK) signal from the SERVO-
PACK. The brake is not controlled from the Machine Controller.
11.1.2 Connections to Σ-II/III SGDH or SGDS SERVOPACK
( 1 ) Example of a Brake ON and OFF Circuit
A circuit is configured to turn the brake ON and OFF using the /BK contact output signal from the SERVOPACK and a
brake power supply. The following diagram shows the standard connections.
* 1. The output terminal is allocated using parameter Pn50F.2. Output terminal 1 (terminal numbers 1and 2) is selected
in the example above.
* 2. Brake control relay contact
* 3. There are 200-V and 100-V brake power supplies.
• Vertical Axis • Axis Subject to External Force
Servomotor
Holding brake External force
Servomotor
Preventing
movement due to
gravity when power is
OFF
The brake built into a Servomotor with a brake uses non-excitation operation and is for use as a holding
brake only. It cannot be used to control or stop axis movement. Use the holding brake only to hold the axis in
a stopped state after the motor has stopped. The torque of the brake is 100% or higher of the rated torque of
the motor.
When using the servomotor on a vertical axis, hunting might occur. If so, set the SERVOPACK parameter
Pn001.1 (Overtravel Stop Mode) to 1.
M
BK
PG
U
V
W
CN2
Red
Black White AC DC
BK-RY
+24 V
L1
L2
L3
L1C
L2C
Brake power supply *3
SGDH or SGDS
SERVOPACK
Power supply
27-
28-
/BK+
/BK-
A (1)
B (2)
C (3)
D (4)
E (5)
F (6)
BK-RY
∗ 1
∗2
∗ 1
Blue or
yellow
Servomotor
with a brake