SMC Networks LECSN-T Series User Manual

3. SIGNALS AND WIRING
3 - 10
3.3.2 Power-on sequence
POINT
The output signal, etc. may be unstable at power-on.
(1) Power-on procedure
1) Always wire the power supply as shown in above section 3.1 using the magnetic contactor with the
main circuit power supply (L1/L2/L3). Configure up an external sequence to switch off the
magnetic contactor as soon as an alarm occurs.
2) Switch on the control circuit power supply (L11/L21) simultaneously with the main circuit power
supply or before switching on the main circuit power supply. If the control circuit power supply is
turned on with the main circuit power supply off, and then the servo-on command is transmitted,
[AL. E9 Main circuit off warning] will occur. Turning on the main circuit power supply stops the
warning and starts the normal operation.
3) The driver receives the servo-on command in 3 s to 4 s + network initial communication time after
the main circuit power supply is switched on.
(Refer to (2) in this section.)
(2) Timing chart
(Note 1)
(3 s to 4 s + network initial communication time)
95 ms (Note 2) 10 ms 95 ms
Servo-on command accepted
Main circuit
Control circuit
Base circuit
Servo-on command
(from controller)
pow er supply
ON
OFF
ON
OFF
ON
OFF
upper side)

SMC Networks LECSN-T Series Specifications

General

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