11-23
11-4 Troubleshooting
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
11
Error and Maintenance
50
0
External encoder
connection error
A disconnection was detected
because communications between
the external encoder and the Servo
Drive were interrupted more than the
specified number of times.
Wire the external encoder correctly as
shown in the connection diagram.
Correct the connector pin
connections.
1
External encoder
communications data
error
There was a communications error in
data from external encoder. There
was a data error mainly due to noise.
The external encoder connection
cable is connected, but a
communications data error occurred.
• Provide the required external
encoder power supply voltage
5 VDC 5% (4.75 to 5.25 V). Be
careful especially when the
external encoder connection cable
is long.
• If the Servomotor cable and the
external encoder connection cable
are bundled together, separate
them.
• Connect the shield to FG. Refer to
the external encoder connection
diagram.
51
0
External encoder
status error 0
Bit 0 of the external encoder error
code (ALMC) was set to 1. Refer to the
external encoder specifications.
Eliminate the cause of the error and
then clear the external encoder error.
Then, temporarily turn OFF the control
power supply to reset.
1
External encoder
status error 1
Bit 1 of the external encoder error
code (ALMC) was set to 1. Refer to the
external encoder specifications.
2
External encoder
status error 2
Bit 2 of the external encoder error
code (ALMC) was set to 1. Refer to the
external encoder specifications.
3
External encoder
status error 3
Bit 3 of the external encoder error
code (ALMC) was set to 1. Refer to the
external encoder specifications.
4
External encoder
status error 4
Bit 4 of the external encoder error
code (ALMC) was set to 1. Refer to the
external encoder specifications.
5
External encoder
status error 5
Bit 5 of the external encoder error
code (ALMC) was set to 1. Refer to the
external encoder specifications.
55
0
Phase-A connection
error
An error such as broken wiring was
detected in the external encoder
phase-A connection.
Check the external encoder phase A
connection.
1
Phase-B connection
error
An error such as broken wiring was
detected in the external encoder
phase-B connection.
Check the external encoder phase-B
connection.
2
Phase-Z connection
error
An error such as broken wiring was
detected in the external encoder
phase-Z connection.
Check the external encoder phase-Z
connection.
82 0
Node address setting
error
The node address set by the rotary
switches on the Servo Drive exceeded
the setting range, when the control
pow
er was turned ON.
• Check the value of the rotary
switches for node address setting.
• Set the rotary switch correctly (set
to 1 to 31), and then turn OFF the
control power supply for the Servo
Drive and turn it ON again.
Alarm
number
Name Cause Measures
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