11 - 2
11. TROUBLESHOOTING
11.2 Operation at error occurrence
An error occurring during operation will result in any of the statuses indicated in the following table.
Operation mode
Error location
Description
Test operation
CC-Link operation
Servo operation
Stop
Stop
Servo side alarm
occurrence
CC-Link data communication
Continued
Continued
Servo operation
Stop
Stop
Option unit
communication error
CC-Link data communication
Stop
Stop
Servo operation
Stop
Stop
CC-Link
communication error
CC-Link data communication
Stop
Stop
Servo operation
Continued
Stop
PLC error/STOP
CC-Link data communication
Stop
Stop
Servo operation
Stop
Continued
Servo side warning
occurrence
CC-Link data communication
Continued
Continued
11.3 CC-Link communication error
This section gives the definitions of the indications given in the communication alarm display section.
The servo amplifier has four 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.
(Note) Communication alarm display LED
L.RUN SD RD L.ERR
Operation
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
Baud rate setting illegal
Station number setting illegal
Baud rate 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)
Note. : Lit : Extinguished : Flicker
Содержание MELSERVO MR-J3-xT
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