SMC Networks LECSN-T Series User Manual

8. TROUBLESHOOTING
8 - 63
Alarm No.: E9
Name: Main circuit off warning
Alarm content
・
The servo-on command was inputted with main circuit power supply off
・
The bus voltage dropped during the servo motor driving under 50 r/min.
Detail
No.
Detail name
Cause
Check method
Check result
Action
E9.1
Servo-on signal
on during main
circuit off
(1)
The main circuit power
supply is off.
For the drive unit, the
power supply of the
converter unit is off.
Check if the main
circuit
power supply is
inputted.
Check if the power
supply of the converter
unit is inputted.
It is not inputted.
Turn on the main circuit
power.
It is inputted.
Check (2).
(2)
The wiring between P3
and P4 was
disconnected.
For the drive unit, the
wiring between P1 and
P2 of the converter unit
was disconnected.
Check the wiring
between P3 and P4.
Check the wiring
between P1 and P2 of
the converter unit.
It is disconnected.
Connect it correctly.
It is connected.
Check (3).
(3)
The main circuit power
supply wiring was
disconnected.
For the drive unit, the
main circuit power
supply wiring of the
converter unit was
disconnected.
Check the main circuit
power supply wiring.
Check the main circuit
power supply wiring of
the converter unit.
It is disconnected.
Connect it correctly.
It has no failure.
Check (4).
(4)
For the drive unit, the
magnetic contactor
control connector of the
converter unit was
disconnected.
Check the magnetic
contactor control
connector of the
converter unit.
It is disconnected.
Connect it correctly.
It has no failure.
Check (5).
(5)
For the drive unit, the
bus bar between the
converter unit and drive
unit was disconnected.
Check the bus bar
between the converter
unit and drive unit.
It is disconnected.
Connect it correctly.
It has no failure.
Check (6).
(6)
The setting value of [Pr.
PA02 Magnetic
contactor drive output
selection] contradicts
the wiring constitution.
Check the [Pr. PA02]
setting and the wiring
constitution.
The setting or wiring is
incorrect.
Review the setting of [Pr.
PA02].
The setting and wiring
are correct.
Check (7).
The setting is correct.
Check (8).
(8)
The bus voltage is low.
Check if the bus
voltage is lower than
the prescribed value.
215 V DC
The voltage is lower
than the prescribed
value.
Review the wiring. Check
the power supply
capacity.
The voltage is equal to
or higher than the
prescribed value.
Check (9).
(9)
The driver is
malfunctioning.
Replace the driver, and
then check the
repeatability.
It is not repeatable.
(10) Replace the driver.
(10)
For the drive unit, the
converter unit is
malfunctioning.
Replace the converter
unit, and then check
the repeatability.
It is not repeatable.
Replace the converter
unit.
E9.2
Bus voltage
drop during low
speed
operation
(1)
The bus voltage
dropped during the
servo motor driving
under 50 r/min.
Check the bus
voltage.
It is lower than the
prescribed value.
200 V
Review the power
supply capacity.
Increase the
acceleration time
constant.
E9.3
Ready-on signal
on during main
circuit off
Check it with the check method for [AL. E9.1].

SMC Networks LECSN-T Series Specifications

General

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