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2. Meanings of LEDs on CC-Link compatible module
2. Meanings of LEDs on CC-Link compatible module
Chapter
4
The LEDs on the CC-Link compatible module express the following statuses.
Use these for confirmation when an error occurs.
RUN
c
CAUTION
Even if the LED display indicates that the communication is normal, data cannot
be exchanged between the master station PLC and RCX controller unless data
has been initialized correctly. Check whether data has been initialized by
referring to Chapter 3.
4-2
: ON
: Blinking (This might seem to be lit dep ending on the a mbient en vironment.)
ERRL
SD
RD
(0.4s)
Others
RUN
ERRL
SD
RD
Front of the unit
: OFF
Norma l communica tion i s ta king p la ce, but the C RC e
sometimes beca use of noise.
The settings ha ve va ried from the ba ud ra t
setting ma de when connected to the C C -Link system.
A C RC error occ urred in the received da ta , a nd a resp onse
ca nnot be ma de .
Norma l communica tion
* Norma l communica tion is esta blished even if da ta i nitia liza tion
is not comp lete. (See C AUTION
There is no da ta a ddressed to the loca l sta tio n.
Sp ecified sta t ion No. is not within the setting ra n ge.
Sp ecified comm unica tion sp ee d is not within the setting ra nge.
Polling resp on se is being ca rried out, but a C RC error o
in the refresh recep tion.
A C RC error occ urred in the da ta a ddressed
There is a p roblem with the ma ster sta tion
(Exa mp le)
1. C C -Link
communica tion is not controlled by the ma ster sta tion.
2. The loca l sta tion (RC X controller) is not set to a remote
sta tion by the ma ster sta tion.
There is no da ta a ddressed to the loca l sta tio n or the da ta
a ddressed to t he loca l sta tion ca nnot be r eceived beca use of
noise.
C ommunica tion sp eed setting
setting.
Da ta ca nnot be rece ived due to op en-circuit fa u lt, etc. in the
communica tion ca ble.
C C -Link comp a tible module is
C C -Link comp a tible module is
An imp roba ble sta te
Meaning
rror occurs
e a nd sta tion No.
below.)
ccurred
to the loca l sta tion.
does not ma tch the ma ster sta tion
not set ena bled.
broken.
device
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