SMC Networks LECSN-T Series User Manual

3. SIGNALS AND WIRING
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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 network communication shut-off due to delay time of the lock. Set the
time from MBR (Lock interlock) off to base circuit shut-off with [Pr. PC02].
(1) 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 (Lock interlock) will turn off, and then after the delay time
set in [Pr. PC02], the driver will be base circuit shut-off status.
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)
(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.
upper side
upper side
lock

SMC Networks LECSN-T Series Specifications

General

Brand	SMC Networks
Model	LECSN-T Series
Category	Controller
Language	English