SMC Networks LECSB2-T Series - Page 354

8. TROUBLESHOOTING
8 - 67
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].
E9.4
Converter unit
forced stop
(1)
The forced stop of
the
converter unit is
enabled during the
servo-on
command.
Check if the forced stop
of the converter unit is
enabled.
It is enabled.
Deactivate the forced
stop of the converter
unit.
It is not enabled.
Check (2).
(2)
The protection
coordination cable
is not correctly
connected.
Check the protection
coordination cable.
It is not connected.
Connect the protection
coordination cable
correctly.
Alarm No.: EA
Name: ABS servo-on warning
Alarm content
・The servo-on was not enabled within 1 s after ABSM (ABS transfer mode) was turned on.
Detail
No.
Detail name
Cause
Check method
Check result
Action
EA.1
ABS servo-on
warning
(1)
The wiring of I/O
signals is incorrect.
Check if the I/O signal
wire is disconnected or
connected loosely.
It has a failure.
Repair or replace the I/O
signal wire.
It has no failure.
Check (2).
(2)
The sequence program
is incorrect.
Check the sequence
program.
The sequence
program is incorrect.
Modify the sequence
program.