Base Circuit Shut-Off Delay Time Function - Mitsubishi Electric MELSERVO-J4 series Instruction Manual

3. SIGNALS AND WIRING

3.6.2 Base circuit shut-off delay time function

The base circuit shut-off delay time function is used to prevent 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
EM2 (Forced stop 2)
Servo motor speed
0 r/min
Base circuit
(Energy supply to
the servo motor)
MBR
(Electromagnetic
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. PC02], and set the value to approximately 1.5 times of the smallest delay time in which the
servo motor shaft does not freefall.
ON
OFF (Enabled)
ON
OFF
ON
OFF (Enabled)
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.
[Pr. PC02]
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