Mitsubishi MELSEC AJ65BT-R2 User Manual page 250

10 TROUBLESHOOTING
(3) The R2 L ERR. LED flickers
Cause
The station No. or transmission
speed switch setting was
changed during normal
operation
The station No. or transmission
speed switch is faulty.
(4) The R2 L ERR. LED turns ON
Cause
An error occurred in the
communication between the
master station and R2.
The setting switch is not set
within the range (station No. 0
or 65 or more, transmission
speed other than 0 to 4).
The terminator is not
connected.
The module or transmission
cable is being affected by noise.
Return the setting to the previous station No. or transmission
speed, and then turn the power ON again or reset it.
If the L RUN LED does not turn ON after the power is turned
ON again, there may be a problem in the hardware. Contact
your nearest dealer or sales office.
If the L ERR. LED starts to flicker even when the switch
setting has not been changed during operation, there may be
a problem in the hardware. Contact your nearest dealer or
sales office.
Check the error code stored in the R2 buffer memory, and set
the correct data before turning the power ON again or
resetting it.
Correctly set the setting switch, and then turn the power ON
again or reset it.
Check that the terminator is connected. If not connected,
connect one, and then turn the power ON again or reset it.
•
Ground (Class 3 grounding) both ends of the CC-Link
dedicated cable's shield wire via the SLD and FG of each
module.
•
Securely ground the module's FG terminal.
•
Securely ground the pipe when piping and wiring.
10 - 6
MELSEC-A
Remedy
Remedy