Mitsubishi Electric Melservo-J4 Instruction Manual page 79

General-purpose ac servo. servo amplifier
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Alarm No.: 69
Name: Command error
 The command position exceeded 32 bits (-2147483648 to 2147483647) when the software limit is
Alarm content
activated.
 The command position exceeded 30 bits (-536870912 to 536870911) from the value that was set when
the software limit was activated.
 After the detection of LSP (Forward rotation stroke end) or LSN (Reverse rotation stroke end), the
command position exceeded 30 bits (-536870912 to 536870911) from the detected position.
 After the detection of FLS (Upper stroke limit) or RLS (Lower stroke limit), the command position
exceeded 30 bits (-536870912 to 536870911) from the detected position.
Detail
Detail name
Cause
No.
69.1
Forward
(1)
The command position
rotation-side
exceeded 32 bits when
software limit
the software limit is
detection -
activated.
Command
excess error
(2)
The command position
exceeded 30 bits from
the value that was set
when the software limit
was activated.
(3)
The controller is
malfunctioning.
(4)
device caused it.
69.2
Reverse
Check it with the check method for [AL. 69.1].
rotation-side
software limit
detection -
Command
excess error
Check method
Check if the command
position is correct.
Check if the parameter
settings of the software
limit ([Pr. PT15] to [Pr.
PT18]) to the command
position are correct.
Replace the controller,
and then check the
repeatability.
Something near the
Check the noise, ambient
temperature, etc.
Check result
The command position
was set to 32 bits or
more.
The command position
was set correctly.
It was set within the
command position.
It was set correctly.
It is not repeatable.
It is repeatable.
There is a problem in the
surrounding.
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Action
Target
Set the command
[GF]
position correctly.
Check (2).
Set [Pr. PT15] to [Pr.
PT18] correctly.
Check (3).
Replace the controller.
Check (4).
Take countermeasures
against its cause.
1.4 Remedies for alarms
1
77

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