Mitsubishi Electric Melservo-J4 Instruction Manual page 75

Alarm No.: 63 Name: STO timing error
 STO input signal turns off while the servo motor is rotating.
Alarm content
Detail Detail name Cause
No.
63.5 STO by (1) STO of the functional
functional safety unit was turned
safety unit off (enabled) under the
following speed
conditions.
1) Servo motor speed:
2) Linear servo motor
3) Direct drive motor
Alarm No.: 64 Name: Functional safety unit setting error
 A setting of the servo amplifier or functional safety unit was incorrect.
Alarm content
Detail Detail name Cause
No.
64.1 STO input error (1) When a functional
safety unit is used, a
connector is connected
to CN8 of the servo
amplifier.
64.2 Compatibility (1) When a functional
mode setting safety unit is used, the
error J3 compatibility mode is
set.
64.3 Operation mode (1) The speed observation
setting error function turned to be
enabled in the fully
closed loop control
mode, linear servo
motor control mode, or
DD motor control mode.
Alarm No.: 65 Name: Functional safety unit connection error
 Communication or signal between a functional safety unit and servo amplifier failed.
Alarm content
Detail Detail name Cause
No.
65.1 Functional (1) The functional safety
safety unit unit came off.
communication
error 1
(2) The functional safety
unit is malfunctioning.
(3) The servo amplifier is
malfunctioning.
(4)
device caused it.
Check method
Check if STO of the
functional safety unit is
off (enabled).
50 r/min or more
speed: 50 mm/s or
more
speed: 5 r/min or
more
Check method
Check the connection of
the CN8 connector.
Check the parameter
setting.
Check if the parameter
setting is correct.
Check method
Check the installation of
the functional safety unit.
Replace the functional
safety unit, and then
check the repeatability.
Replace the servo
amplifier, and then check
the repeatability.
Something near the Check the noise, ambient
temperature, etc.
Check result
It is off (enabled).
Check result
It is connected.
The J3 compatibility
mode is set.
The setting is incorrect.
Check result
It is disconnected.
It is connected.
It is not repeatable.
It is repeatable.
It is not repeatable.
It is repeatable.
There is a problem in the
surrounding.
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Action Target
Turn on STO (disabled). [A]
[B]
[GF]
Action Target
Turn off the control circuit [A]
power supply of the [B]
servo amplifier, and then [GF]
remove the connector of
CN8.
The J3 compatibility [B]
mode is not supported
with the functional safety
unit. Set it correctly.
Set it correctly. [A]
[B]
[GF]
Action Target
Turn off the control circuit [A]
power supply of the [B]
servo amplifier, and then [GF]
connect the functional
safety unit.
Check (2).
Replace the functional
safety unit.
Check (3).
Replace the servo
amplifier.
Check (4).
Take countermeasures
against its cause.
1.4 Remedies for alarms
1
73