HOW TO CHECK FOR ERROR USING THE LEDS

 

 

 

 

 

 

 

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

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