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HOW TO CHECK FOR ERROR USING THE LEDS
48
LED Status
Cause
L. RUN
SD
RD
L. ERR
"
#
#
#
Normal communication is made but CRC error has occurred due to noise.
"
#
#
$
Normal communication
"
#
$
#
Hardware fault
"
#
$
$
Hardware fault
"
$
#
#
Cannot answer due to CRC error of receive data.
"
$
#
$
Data sent to the host station does not reach destination.
"
$
$
#
Hardware fault
"
$
$
$
Hardware fault
$
#
#
#
Polling response is made but refresh receive is in CRC error.
$
#
#
$
Hardware fault
$
#
$
#
Hardware fault
$
#
$
$
Hardware fault
$
$
#
#
Data sent to the host station is in CRC error.
$
$
#
$
There is no data sent to the host station, or data sent to the host station cannot be
received due to noise.
$
$
$
#
Hardware fault
$
$
$
$
Cannot receive data due to open cable, etc.
$
$
#
$
"
Invalid baud rate or station number setting
"
#
#
#
Baud rate or station number changed during operation.
$
$
$
"
WDT error occurrence (hardware fault), power off, power supply failure
"
: On,
$
: Off,
#
: Flicker