Mitsubishi Electric MELSERVO-J4 MR-J4 TM Instruction Manual page 258

8. TROUBLESHOOTING
Alarm No.: 69 Name: Command error
Alarm content
Detail
Detail name
No.
69.3 Forward (1) The command position
rotation stroke
end detection -
Command
excess error
(2) The stroke limit switch
(3) The controller is
(4) Something near the
(1) The command position
69.4 Reverse
rotation stroke
end detection -
Command
excess error
(2) The stroke limit switch
(3) The controller is
(4) Something near the
The command position exceeded 32 bits (-2147483648 to 2147483647) when the software limit is
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.
Cause
Check the command
exceeded 30 bits from position.
the detected position
after the detection of
LSP (Forward rotation
stroke end).
Check if the limit
for forward rotation is switch is connected
not connected to LSP correctly.
(Forward rotation
stroke end).
Replace the
malfunctioning. controller, and then
check the
repeatability.
Check the noise,
device caused it. ambient temperature,
etc.
Check the command
exceeded 30 bits from position.
the detected position
after the detection of
LSN (Reverse rotation
stroke end).
Check if the limit
for reverse rotation is switch is connected
not connected to LSN correctly.
(Reverse rotation
stroke end).
Replace the
malfunctioning. controller, and then
check the
repeatability.
Check the noise,
device caused it. ambient temperature,
etc.
Check method Check result
The command
position was set to
30 bits or more.
It was set correctly.
It is not connected.
It is connected.
It is not repeatable.
It is repeatable.
It has a failure.
The command
position was set to
30 bits or more.
It was set correctly.
It is not connected.
It is connected.
It is not repeatable.
It is repeatable.
It has a failure.
8 - 11
Action Target
Check operation [TM]
pattern.
Check (2).
Connect it correctly.
Check (3).
Replace the
controller.
Check (4).
Take
countermeasures
against its cause.
Check operation
pattern.
Check (2).
Connect it correctly.
Check (3).
Replace the
controller.
Check (4).
Take
countermeasures
against its cause.