SMC Networks LECSN-T Series

3. SIGNALS AND WIRING
3 - 34
3) When network communication shut-off occurs
The dynamic brake may operate depending on the communication shut-off status.
ON
OFF
ON
OFF
0 r/min
Network communication has broken.
Model speed command 0
and equal to or less than
zero speed (Note)
Tb [Pr. PC02 Electromagnetic
brake sequence output]
Operation delay time
of the electromagnetic
brake
ON
ON
OFF
OFF
MBR
(Electromagnetic
brake interlock)
ON (no alarm)
OFF (alarm)
Base circuit
(Energy supply to
the servo motor)
Servo amplifier
display
Servo motor speed
ALM (Malfunction)
Release
Activate
Electromagnetic
brake
Ready-on command
(from controller)
Servo-on command
(from controller)
86
No alarm
(d1)
Note.
The model speed command is a speed command generated in the driver for forced stop deceleration of the servo motor.
(d) Both main and control circuit power supplies off
MBR
(Electromagnetic
brake interlock)
(Note 2)
ON
OFF
Base circuit
ON
OFF
Alarm
[AL. 10 Undervoltage]
No alarm
Alarm
Approx. 10 ms
Dynamic brake
Dynamic brake
+ Electromagnetic brake
Electromagnetic brake
(Note 1)
Operation delay time of
the electromagnetic brake
Servo motor speed
ON
OFF
Main circuit
Control circuit
pow er supply
0 r/min
Note 1.
Variable according to the operation status.
2.
ON: Lock is not activated.
OFF: Lock is activated.
upper side
upper side
lock
lock
lock
lock
lock