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B
B
3
3
t
t
y
y
p
p
e
e
B
B
5
5
t
t
y
y
p
p
e
e
2
3
t
y
p
e
2
5
t
y
p
e
2
3
t
y
p
e
2
5
t
y
p
e
7.1.10. Brake
7.1.10.1. YSB Series Megatorque Motor Equipped With Brake
l The brake for YSB series Motor is an electromagnetic type that activates when current to a coil
is off (power-off activated type). The brake features non-backlash.
l You may use the brake to stop the Motor in case of an emergency such as sudden power
shutdown or occurrence of serious error alarm when the Motor is in motion.
！ Caution: Use of the brake to stop the Motor is for the emergency only. You may
l The brake can be used as an auxiliary measure for the position holding rigidity when the Motor
is stationary under positioning operation. In such a case use the brake control (BRKC) output for
the brake control signal.
7.1.10.2. Brake Output (BRK)
l This is the output signal for emergency stop of the Motor when sudden shutdown of the power
or serious alarm occurs. Use this signal to control ON/OFF of brake power.
l For the B5 and the 25 Driver Units, the BF0 parameter makes the BRK output effective.
l When the I/O combination type is other than TY8 for the B3 and the 23 Driver Units, the OM0
parameter makes the BRK output effective.
l When the I/O combination type is TY8 for the B3 and the 23 Driver Units, the parameters BF0
and OM0 make the BRK output effective.
l The BRK output is a normally closed output, but it opens in the following cases to prevent
racing of the Motor.
Figure 7-12: Signal timing of BRK output
Power supply
DRDY output
SVON input
EMST input
BRK output
not use the brake for frequent everyday operation.
(1) SVON input: OFF.
(2) Initilizing the System after the power is turned on.
(3) When SVON input is OFF or the servo is off because of the MO command input.
(4) Occurrence of alarm that makes the servo off.
(5) EMST input is ON.
ON
OFF
Occurrence of alarm
causing servo-lock
Closed
Open
ON
OFF
ON
OFF
Closed
Open
Invalid
— 7-13 —
7.1. General Operation and Function
7.1.10. Brake
Occurrence of alarm
causing servo-off
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Troubleshooting
