Specifications

3-7
3.2.6
LED indications
The MR-J2S-T01 option unit has six LEDs. Their indications are indicated below.
L.RUN : Turned on at normal receive of refresh data. Turned off when refresh data is
broken for a predetermined period.
SD : Turned on when send data is "0".
RD : Turned on when a carrier is detected in receive data.
L.ERR : Turned on when the data addressed to the host is in CRC or abort error.
S.ERR : Turned on when the servo amplifier is in an alarm status.
WD : Turned on when the CPU of the MR-J2S-T01 option unit becomes faulty.
LED
L.RUN SD RD L.ERR
Description
Normal communication is made but CRC error sometimes occurs due to
noise.
Normal communication
Hardware fault
Hardware fault
Receive data is in CRC error and response cannot be made.
Data addressed to the host does not arrive.
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 is in CRC error.
Data addressed to the host does not exist or 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 0.4s).
Data cannot be received due to power off, power supply section fault, open
cable, etc.
LED
SERR WD
Description (as described above for L.RUN, SD, RD, L.ERR)
Servo amplifier in normal status
Servo amplifier in alarm status
*
Option unit in normal status
*
Option unit CPU in alarm status
: On : Off : Flicker *:
Indefinite