Mitsubishi Electric Melservo-J4 Instruction Manual page 118

Alarm No.: E7
Alarm content
Detail Detail name
No.
E7.1 Controller
forced stop
input warning
Alarm No.: E8
Alarm content
Detail Detail name
No.
E8.1 Decreased
cooling fan
speed warning
E8.2 Cooling fan stop
Alarm No.: E9
Alarm content
Detail Detail name
No.
E9.1 Servo-on signal
on during main
circuit off
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
116
1.5 Remedies for warnings
Name: Controller forced stop warning
 The forced stop signal of the servo system controller was enabled.
Cause Check method
(1) The forced stop signal Check if the servo
of the servo system system controller is a
controller was inputted. forced stop status.
(2) The forced stop signal Check if the controller is
of the controller was in a forced stop status.
inputted with Modbus
RTU communication.
Name: Cooling fan speed reduction warning
 The cooling fan speed decreased to the warning occurrence level or less.
Cause Check method
(1) Foreign matter was Check if a foreign matter
caught in the cooling is caught in the cooling
fan. fan.
(2) Cooling fan life expired. Check the total of power
on time of the servo
amplifier.
Check it with the check method for [AL. E8.1].
Name: Main circuit off warning
 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.
Cause Check method
(1) The main circuit power Check if the main circuit
supply is off. power supply is inputted.
For the drive unit, the Check if the power
power supply of the supply of the converter
converter unit is off. unit is inputted.
(2) The wiring between P3 Check the wiring
and P4 was between P3 and P4.
disconnected. Check the wiring
For the drive unit, the between P1 and P2 of
wiring between P1 and the converter unit.
P2 of the converter unit
was disconnected.
(3) The main circuit power Check the main circuit
supply wiring was power supply wiring.
disconnected. Check the main circuit
For the drive unit, the power supply wiring of
main circuit power the converter unit.
supply wiring of the
converter unit was
disconnected.
(4) For the drive unit, the Check the magnetic
magnetic contactor contactor control
control connector of the connector of the
converter unit was converter unit.
disconnected.
(5) For the drive unit, the Check the bus bar
bus bar between the between the converter
converter unit and drive unit and drive unit.
unit was disconnected.
Check result Action
It is the forced stop Ensure safety and cancel
status. the forced stop signal of
the controller.
It is the forced stop Ensure safety and cancel
status. the forced stop signal of
the controller.
Check result Action
Something has been Remove the foreign
caught. matter.
Nothing has been Check (2).
caught.
It exceed the cooling fan Replace the servo
life. amplifier.
Check result Action
It is not inputted. Turn on the main circuit
power.
It is inputted. Check (2).
It is disconnected. Connect it correctly.
It is connected. Check (3).
It is disconnected. Connect it correctly.
It has no failure. Check (4).
It is disconnected. Connect it correctly.
It has no failure. Check (5).
It is disconnected. Connect it correctly.
It has no failure. Check (6).
Target
[B]
[WB]
[RJ010]
[A]
Target
[A]
[B]
[WB]
[RJ010]
[GF]
Target
[A]
[B]
[WB]
[RJ010]
[GF]