Mitsubishi Electric MELSERVO-J4 MR-J4 A Series Instruction Manual page 88

3. SIGNALS AND WIRING
3.7.2 Base circuit shut-off delay time function
The base circuit shut-off delay time function is used to maintain power at the motor for a specified time delay
after a forced stop activation (EM2 goes off). The time between completion of EM2 (Forced stop 2) or
activation of MBR (Electromagnetic brake interlock) due to an alarm occurrence, and the time at which the
base is cut, is the base cut delay time and is set by [Pr. PC16].
(1) Timing chart
ON
EM2 (Forced stop 2) EM2( 2)
OFF (Enabled)
OFF(
Servo motor speed
0 r/min
0r/min
Base circuit
ON
(Energy supply to (
OFF
)
the servo motor)
ON
MBR
MBR(
(Electromagnetic )
OFF (Enabled)
OFF(
brake interlock)
(2) Adjustment
While the servo motor is stopped, turn off EM2 (Forced stop 2), adjust the base circuit shut-off delay
time in [Pr. PC16], and set the value to approximately 1.5 times of the smallest delay time in which the
servo motor shaft does not freefall.
)
[Pr. PC16]
[Pr.PC16]
)
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. PC16], the servo
amplifier will be base circuit shut-off status.
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