Cc-Link Communication Error; When Alarm Or Warning Has Occurred - Mitsubishi Electric MELSERVO-J2-Super Series Instruction Manual

12. TROUBLESHOOTING

12.3 CC-Link Communication Error

This section gives the definitions of the indications given in the communication alarm display section.
The MR-J2S-T01 option unit has six LED indications.
L.RUN : Lit at normal receive of refresh data. Extinguished when data is not received for a given period of
time.
SD : Lit when send data is "0".
RD : Lit when the carrier of receive data is detected.
L.ERR : Lit when the data addressed to the host is in CRC or abort error.
S.ERR : Lit when the servo amplifier is in an alarm status.
WD : Lit when the MR-J2S-T01 option unit is in CPU fault.
(Note) Communication alarm display LED
L.RUN SD RD
Note. : Lit : Extinguished
(Note)
Communication
alarm display LED
S.ERR WD
Servo amplifier in normal status
Servo amplifier in alarm occurrence status
Option unit in normal status
Option unit in CPU fault status
Note. : Lit : Extinguished

12.4 When alarm or warning has occurred

L.ERR
Normal communication is made, but a CRC error sometimes occurs due to noise.
Normal communication
Hardware fault
Hardware fault
Receive data results in CRC error, disabling a response.
Data does not reach the host.
Hardware fault
Hardware fault
Polling response is made, but refresh receive is in CRC error.
Hardware fault
Hardware fault
Hardware fault
Data addressed to the host resulted in CRC error.
Data does not reach the host, or the data addressed to the host cannot be received due
to noise.
Hardware fault
Baudrate setting illegal
Station number setting illegal
Baudrate or station number setting changed midway (ERROR flickers for about 4s)
Data cannot be received due to power-off, power supply failure, open cable, etc.
WDT error occurrence (hardware fault)
: Flicker
Operation (Refer to the above for L.RUN, SD, RD and L.ERR.)
: Indefinite
: Flicker
POINT
Configure up a circuit which will detect the trouble (RX(n+1)A or
RX(n+3)A) signal and turn off the servo-on (RYn0) at occurrence of an
alarm.
Operation
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