Yamaha RCX series, Руководство пользователя

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4-2
Chapter
4
TROUBLESHOOTING
2. Meanings of LEDs on CC-Link compatible module
SD
ERRL
RUN
RD
1
2 3
4
5
6
7 8
9
1
2 3
4
5
6
7 8
9
1
2 3
4
5
6
7
8
9
Front of the unit
The LEDs on the CC-Link compatible module express the following statuses.
Use these for confirmation when an error occurs.
: ON : OFF
: Blinking (This might seem to be lit depending on the ambient en vironment.)
RUN ERRL SD RD Meaning
Normal communication i s taking place, but the CRC e rror occurs
sometimes because of noise.
(0.4s)
The settings have varied from the baud rat e and station No.
setting made when connected to the CC-Link system.
A CRC error occ urred in the received data, and a response
cannot be made .
Normal communication
* Normal communication is established even if data i nitialization
is not complete. (See CAUTION below.)
There is no data a ddressed to the local statio n.
Specified stat ion No. is not within the setting ran ge.
Specified comm unication spee d is not within the setting range.
Polling respon se is being carried out, but a CRC error o ccurred
in the refresh reception.
A CRC error occ urred in the data addressed to the local station.
There is a problem with the master station
(Example)
1. CC-Link
communication is not controlled by the master sta tion.
2. The local station (RCX controller) is not set to a remote device
station by the master station.
There is no data a ddressed to the local statio n or the data
addressed to t he local station cannot be r eceived because of
noise.
Communication speed setting
does not match the master station
setting.
Data cannot be rece ived due to open-circuit fau lt, etc. in the
communication cable.
CC-Link compatible module is
not set enabled.
CC-Link compatible module is broken.
Others An improbable state
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.
2. Meanings of LEDs on CC-Link compatible module