Mitsubishi Electric Melservo-J4 Instruction Manual page 104

Alarm No.: 90
Alarm content
Detail Detail name
No.
90.1 Home position
return
incomplete
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
102
1.5 Remedies for warnings
Name: Home position return incomplete warning
 A home position return did not complete normally with the positioning function.
Cause Check method
(1) An automatic operation Check if the home
was executed at home position return was not
position return executed (the following
incompletion. devices are not off.).
[A]: ZP (Home position
return completion)
[GF]: ZP2 (Home
position return
completion 2)
(2) A positioning operation Check if [AL. 25 Absolute
was executed without position erased] occurred
home position setting using alarm history.
with absolute position
after [AL. 25 Absolute
position erased]
occurred.
(3) With the indexer Check if [AL. 90.1]
method, [AL. E3 occurred simultaneously
Absolute position with start of the
counter warning] positioning operation.
occurred
simultaneously with the
alarm.
(4) ZP (Home position Check if ZP (Home
return completion) position return
turned off after the completion) is off.
home position return
was executed.
(5) A software stroke limit/ In the I/O mode, check if
stroke limit was [AL. 99 Stroke limit
detected. warning] occurred when
"_ _ _ 1" is set to [Pr.
PD12], or [AL. 98
Software stroke limit
warning] occurred when
"_ 1 _ _" is set to [Pr.
PD12].
(6) ZP2 (Home position Check if ZP2 (Home
return completion 2) position return
turned off after the completion 2) is off.
home position return
was executed.
Check result Action
A home position return Execute a home position
was not executed. return.
A home position return Check (2).
was executed.
[AL. 25 Absolute position Check the battery
erased] occurred. voltage and battery cable
if they have a failure and
execute a home position
return after remove the
failure.
[AL. 25 Absolute position Check (3).
erased] did not occur.
[AL. 90.1] did not occur Remove the cause of
simultaneously with start [AL. E3], and perform
of the positioning home position return.
operation but occurred (Check it with the check
during positioning method for [AL. E3].)
operation.
[AL. 90.1] occurred Check (4).
simultaneously with start
of the positioning
operation.
ZP (Home position return Check the conditions if
completion) is off. ZP (Home position return
completion) can be off.
(Refer to section 2.3 of
"MR-J4-_A_-RJ Servo
Amplifier Instruction
Manual (Positioning
Mode)")
[AL. 98 Software stroke Move the machine to
limit warning] or [AL. 99 within the limit range, and
Stroke limit warning] then make a home
occurred in the I/O mode. position return.
When the home position
is fixed, enable servo-on
again.
[AL. 98 Software stroke Check (6).
limit warning] or [AL 99
Stroke limit warning] did
not occur.
Or the motion mode is
set.
ZP2 (Home position Check the conditions in
return completion 2) is which ZP2 (Home
off. position return
completion 2) is off.
MR-J4-_GF_(-RJ)
Servo Amplifier
Instruction Manual (I/O
Mode)
Target
[A]
[GF]
[A]
[GF]