Mitsubishi Electric Melservo-J4 Instruction Manual page 121

Alarm No.: F2 Name: Drive recorder - Miswriting warning
 A waveform measured by the drive recorder function was not recorded.
Alarm content
Detail Detail name Cause
No.
F2.1 Drive recorder - (1)
Area writing
time-out
warning
F2.2 Drive recorder - (1)
Data miswriting
warning
Alarm No.: F3 Name: Oscillation detection warning
 [AL. 54 Oscillation detection] can occur.
Alarm content
Detail Detail name Cause
No.
F3.1 Oscillation Check it with the check method for [AL. 54.1].
detection
warning
Alarm No.: F4 Name: Positioning warning
 Target position or acceleration time constant/deceleration time constant was set out of setting range.
Alarm content
Detail Detail name Cause
No.
F4.4 Target position (1)
setting range
error warning
F4.6 Acceleration (1)
time constant
setting range
error warning
F4.7 Deceleration (1)
time constant
setting range
error warning
F4.9 Home position (1)
return type error
warning
Check method
The Flash-ROM is Disconnect the cables
malfunctioning. except for the control
circuit power supply, and
then check the
repeatability.
Data were not written to Check if clearing alarm
the drive recorder area. history disables this
alarm with MR
Configurator2.
Check method
Check method
A target position was Check the setting value
set out of setting range. of the target position.
The acceleration time Check the setting value
constant or the of the acceleration time
deceleration time constant ([Pr. PT49]) and
constant was set out of the deceleration time
setting range. constant ([Pr. PT50]).
Check it with the check method for [AL. F4.6].
A home position return Check the setting value
type was set out of ([Pr. PT45]) of the home
setting range. position return type.
Check result
It is repeatable.
It is not canceled.
Check result
Check result
It is out of setting range.
It is out of setting range.
It is not corresponding to
a value for the home
position return type.
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Action Target
Replace the servo [A]
amplifier. [B]
[WB]
[RJ010]
[GF]
Replace the servo
amplifier.
Action Target
Action Target
Set the target position [Others]
correctly, and cancel the
warning (turn on
C_ORST).
Set the acceleration time [GF]
constant and the
deceleration time
constant correctly, and
cancel the warning (turn
on ORST).
Set the home position [GF]
return type correctly, and
cancel the warning (turn
on ORST).
1.5 Remedies for warnings
1
119