Mitsubishi Electric Melservo-J4 Instruction Manual page 110

Alarm No.: 98
Alarm content
Detail Detail name
No.
98.1 Forward
rotation-side
software stroke
limit reached
98.2 Reverse
rotation-side
software stroke
limit reached
Alarm No.: 99
Alarm content
Detail Detail name
No.
99.1 Forward
rotation stroke
end off
99.2 Reverse
rotation stroke
end off
99.4 Upper stroke
limit off
99.5 Lower stroke
limit off
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
108
1.5 Remedies for warnings
Name: Software limit warning
 A software limit set with the parameter was reached for the positioning function.
Cause Check method
(1) A software limit was set Check if the parameter
within the actual settings ([Pr. PT15] to
operation range. [Pr. PT18]) to the
operation range are
correct.
(2) A point table of the Check if the target
position data which position of the point data
exceeds the software to the operation range
limit was executed. was correct.
(3) A software limit was Check if the JOG
reached by using the operation or manual
JOG operation or pulse generator
manual pulse generator operation was executed
operation. properly to the operation
range.
Check it with the check method for [AL. 98.1].
Name: Stroke limit warning
 The stroke limit signal is off.
Cause Check method
(1) The forward rotation Check if the limit switch
stroke limit switch is is connected correctly.
connected to LSP.
(2) The forward rotation Check if the forward
stroke end was rotation stroke limit
exceeded during switch turned off.
driving.
(1) The reverse rotation Check if the limit switch
stroke limit switch is is connected correctly.
connected to LSN.
(2) The reverse rotation Check if the reverse
stroke end was rotation stroke limit
exceeded during switch turned off.
driving.
(1) The upper stroke limit Check if the limit switch
switch is not connected is connected correctly.
to FLS of the controller.
(2) The upper stroke limit Check if the upper stroke
was exceeded during limit switch turned off.
driving.
(1) The lower stroke limit Check if the limit switch
switch is not connected is connected correctly.
to RLS of the controller.
(2) The lower stroke limit Check if the lower stroke
was exceeded during limit switch turned off.
driving.
Check result Action
The setting was out of Set [Pr. PT15] to [Pr.
operation range. PT18] correctly.
The setting was within Check (2).
operation range.
The setting was out of Set the point table
operation range. correctly.
The setting was within Check (3).
operation range.
It reached to the out of Operate within the
operation range. software limit.
Adjust properly the
parameters such as JOG
speed and multiplication
of the manual pulse as
necessary.
Check result Action
It is not connected. Connect it correctly.
It is connected. Check (2).
It turned off. Check operation pattern.
It is not connected. Connect it correctly.
It is connected. Check (2).
It turned off. Check operation pattern.
It is not connected. Connect it correctly.
It is connected. Check (2).
It turned off. Check operation pattern.
It is not connected. Connect it correctly.
It is connected. Check (2).
It turned off. Check operation pattern.
Target
[A]
[GF]
Target
[A]
[GF]
[GF]