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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