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FX
-128ASL-M User's Manual
3U
9.1
LED Diagnosis of 128ASL-M
LED
Status
display
POWER
OFF
Flicker
LINK
OFF
SET
Flicker
OFF
ALM
Slow flicker
(one-second
intervals)
72
Description
5 V DC is being supplied from the
ON
PLC.
Unit error or 5 V DC is not being
supplied from the PLC.
ON
Unit error
Operating normally
Unit error or 5 V DC power OFF
Automatic address detection in
ON
progress
Writing in the EEPROM
Operating normally
ON
DP/DN disconnection error
DP/DN short error
Corrective action
The power supply is normal.
•
Correctly connect the extension cable.
•
Check that there is no disconnection or poor contact in the
extension cable.
•
Properly supply the power of the PLC.
•
When the service power supply of the PLC main units used, make
sure that the supply capacity is not exceeded.
•
When both the connection status and the PLC main unit are all right,
the hardware may have failed.
For repair, contact your local Mitsubishi Electric representative.
•
Check the wiring in the AnyWireASLINK system.
•
Properly supply the external power for communication.
•
When both the wiring and the external power supply for
communication are all right, the hardware may have failed.
For repair, contact your local Mitsubishi Electric representative.
Communication is normal.
•
Check the wiring in the AnyWireASLINK system.
•
Properly supply the external power for communication.
•
Correctly connect the extension cable.
•
Properly supply the power of the PLC.
•
When both the wiring and the external power supply for
communication are all right, the hardware may have failed.
For repair, contact your local Mitsubishi Electric representative.
The automatic address detection is in progress.
Data is being written to the EEPROM.
The system is operating normally.
The transmission cables (DP, DN) may be disconnected, or there may
be no response from the slave module. The slave module may have
failed or the system configuration may have been changed after the
automatic address detection. Check error ID information in the buffer
memory, identify the disconnected area, and perform the following:
•
Check that the transmission cables (entire cables) are free from
disconnection. Also check that the cables have been crimped with
proper pin assignment using link connectors appropriate for the
cross-sectional area.
•
Check that the signal cables are properly connected to the terminal
block of the 128ASL-M. In addition, check that there is no incorrect
wiring and that screws are tightened sufficiently.
•
When creating a new system, adding or removing a slave module,
or changing the address of the slave module, perform the automatic
address detection. After the automatic address detection is
performed, check that the number of slave modules and the address
are consistent with those of the actual system.
•
If the LINK LED of the slave module does not flash, check that there
is no disconnection, short circuit, incorrect wiring, or poor contact in
the transmission cables (DP, DN) around the module.
There may be a short in the transmission cables (DP, DN) or the current
supplied through the transmission cables (DP, DN) is over the
maximum allowable value. Perform the following:
•
Check that the transmission cables (DP, DN) are not short-circuited.
When crimping the link connector, check that the pin assignment is
correct.
•
Check that the transmission cables (DP, DN) are not in contact with
each other and that there is no incorrect wiring in the terminal block
wiring of the 128ASL-M and the slave module.
•
Correct the cables (cross-sectional area, total length) and modules
(type, the number of connected modules) so that the current
consumption of all the slave modules does not exceed the
transmission cable supply current of the 128ASL-M.
9 Troubleshooting
9.1 LED Diagnosis of 128ASL-M
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