SMC Networks LECSN-T Series User Manual

3. SIGNALS AND WIRING
3 - 31
3.9.2 Timing chart
(1) When you use the forced stop deceleration function
POINT
To enable the function, set "2 _ _ _ (initial value)" in [Pr. PA04].
(a) Servo-on command (from upper side) on/off
POINT
Keep the ready-on command (from upper side) on while the servo-on command
(from upper side) is off. When the ready-off command (from upper side) is off,
Tb [Pr. PC02 Lock sequence output] does not function.
When servo-on command is turned off, the servo lock will be released after Tb [ms], and the servo
motor will coast. If the lock is enabled during servo-lock, the brake life may be shorter. Therefore, set
Tb about 1.5 times of the minimum delay time where the moving part will not drop down for a vertical
axis system, etc.
(Note 1)
ON
OFF
ON
OFF
0 r/min
ON
OFF
(Note 3)
0 r/min
ON
OFF
MBR
(Electromagnetic
brake interlock)
Base circuit
Servo motor speed
Operation delay time
of the electromagnetic
brake
Ready-on command
(from controller)
Release
Activate
Operation command
(from controller)
Electromagnetic
brake
Servo-on command
(from controller)
Tb [Pr. PC02 Electromagnetic brake sequence output]
Release delay time and external relay, etc. (Note 2)
Approx. 95 ms
Approx. 95 ms
Note 1.
ON: Lock is not activated.
OFF: Lock is activated.
2.
Lock is released after delaying for the release delay time of lock and operation time of external circuit relay. For the release
delay time of lock, refer to chapter 15.
3.
Give the operation command from the upper side after the lock is released.
upper side
upper side
upper side
lock
lock

SMC Networks LECSN-T Series Specifications

General

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