3 SIGNALS AND WIRING
3.6 Forced stop deceleration function
111
3
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 network communication shut-off 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].
Timing chart
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.
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
0 r/min
ON
ON
OFF
Servo-on command
(from controller)
Ready-on command
(from controller)
ON
OFF
Electromagnetic brake
ON
OFF
Release
Activate
[Pr. PC02]
MBR
(Electromagnetic
brake interlock)
Base circuit
(Energy supply to
the servo motor)
Servo motor speed
OFF (Enabled)
OFF (Enabled)
EM2 (Forced stop 2)
Summary of Contents for MELSERVO-J4 series
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