[Al. 025_Absolute Position Erased] - Mitsubishi Electric Melservo-J5 MR-J5 Series User Manual

[AL. 025_Absolute position erased]

• The absolute position data have errors.
• Power was switched on for the first time in the absolute position detection system.
[AL. 025.1_Servo motor encoder - Absolute position erased]
Cause
1.
Power was switched on for the first time in the
absolute position detection system.
2.
The servo motor, which is different from servo
motor that had been connected on the battery-
less absolute position encoder loaded servo
motor that has been connected on startup of
the absolute position detection system, was
incorrectly connected.
3.
After the control circuit power supply was shut
off, the battery was removed in either of the
following situations:
• When using an MR-BAT6V1SET(-A) battery or MR-BT6VCASE
battery case, CN4 of the servo amplifier was disconnected with
the control circuit power supply off.
4.
The power was shut off in either of the
following situations:
• When using an MR-BAT6V1SET(-A) battery or MR-BT6VCASE,
the power was shut off with the battery disconnected from CN4.
5.
The battery voltage is low. The battery is
exhausted.
6.
The voltage dropped considerably in the
encoder cable wired to the battery.
7.
A battery cable is malfunctioning.
8.
There is a loose connection of the encoder
cable on the servo motor side.
9.
When using direct drive motor, the absolute
position storage unit is not connected.
10.
The servo amplifier is malfunctioning.
11.
The encoder is malfunctioning.
1 SERVO AMPLIFIER TROUBLESHOOTING
30
1.3 Handling methods for alarms/warnings
Check/action method
When the power was switched on for the first time after the absolute position
detection system is set, check that the battery is mounted correctly before
homing.
When a servo motor with a batteryless absolute position encoder is used, wait
for 5 s in the alarm occurrence, and then cycle the power. Perform homing.
Connect the servo motor that was connected at the startup of the absolute
position detection system. Start up the absolute position detection system
again.
If the battery was disconnected as described in the left column, check that the
battery is mounted correctly before homing.
If the power supply was shut off as described in the left column, check that the
battery is mounted correctly before homing.
If the power supply was not shut off as described in the left column, check if
the following cases apply:
When MR-BAT6V1SET(-A) or MR-BT6VCASE is used, see 6.
Check the battery voltage with a tester. If the voltage is lower than 3 V DC,
replace the battery.
Check if recommended cable is used for the encoder cable.
Refer to "Optional power cable" in the following manual.
Rotary Servo Motor User's Manual (HK series)
Check for a loose connection with a tester.
If there is a loose connection, use a recommended cable.
Check for a loose connection with a tester. Measure the voltage on the servo
motor side.
If there is a loose connection, repair or replace the encoder cable.
Refer to "Encoder cable combination" in the following manual.
MR-J5 Direct Drive Motor User's Manual
Replace the servo amplifier.
Replace the servo motor.
Model
[A]
[G]
[WG]