94
HOW TO CHECK FOR ERROR
USING THE LEDS
z
: On,
{
: Off,
: Flicker
LED Status
Cause
RUN L.RUN
SD
RD
L.ERR
z
z
Normal communication is made but CRC error has occurred due to noise.
z
z
{
Normal communication
z
z
{
Hardware fault
z
z
{
{
Hardware fault
z
z
{
Cannot answer due to CRC error of receive data.
z
z
{
{
Data sent to the host station does not reach destination.
z
z
{
{
Hardware fault
z
z
{
{
{
Hardware fault
z
{
Polling response is made but refresh receive is in CRC error.
z
{
{
Hardware fault
z
{
{
Hardware fault
z
{
{
{
Hardware fault
z
{
{
Data sent to the host station is in CRC error.
z
{
{
{
There is no data sent to the host station, or data sent to the host station
cannot be received due to noise.
z
{
{
{
Hardware fault
z
{
{
{
{
Cannot receive data due to break in the cable, etc.
z
{
{
{
z
Invalid baud rate or station number setting
z
z
Baud rate or station number changed during operation.
{
{
{
{
{
Baud rate or station number changed during operation.
-
-
-
-
Master station is connected to CC-Link ver. 1 and FR-A7NC is connected to
CC-Link ver. 2.
