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3. SIGNALS AND WIRING
3 - 22
(2) Timing chart
When EM2 (Forced stop 2) turns off, the motor will decelerate according to [Pr. PC24 Forced stop
deceleration time constant]. Once the motor speed is below [Pr. PC07 Zero speed] after completion of
the deceleration command, base power is cut and the dynamic brake activates.
Base circuit
(Energy supply to
t
he servo motor)
0 r/min
Servo motor speed
MBR
(Electromagneti
c
brake interlock)
ON
OFF (Enabled)
ON
OFF
Deceleration time
Command
Rated Speed
Ordinary
operation
Forced stop
deceleration
Dynamic brake
+
Electromagnetic brake
ON
OFF (Enabled)
EM2 (Forced stop 2)
Zero speed
([Pr. PC07])
[Pr. PC24]
3.6.2 Base circuit shut-off delay time function
The base circuit shut-off delay time function is used to prevent a vertical axis from dropping at a forced stop
(EM2 goes off), alarm occurrence, or SSCNET III/H communication brake due to delay time of the
electromagnetic brake. Set the time from MBR (Electromagnetic brake interlock) off to base circuit shut-off
with [Pr. PC02].
(1) Timing chart
MBR
(Electromagnetic
brake interlock)
ON
OFF (Enabled)
Base circuit
(Energy supply to
t
he servo motor)
0 r/min
Servo motor speed
ON
OFF (Enabled)
EM2 (Forced stop 2)
ON
OFF
[Pr. PC02]
When EM2 (Forced stop 2) turns off or an
alarm occurs during driving, the servo
motor will decelerate based on the
deceleration time constant. MBR
(Electromagnetic brake interlock) will turn
off, and then after the delay time set in [Pr.
PC02], the servo amplifier will be base
circuit shut-off status.