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5-2 Troubleshooting CC-Link Network
Errors
The communications status on the CC-Link network can be checked on the CC-Link communications
indicators on the Gateway Unit.
Refer to this information when troubleshooting.
To troubleshoot errors in the CC-Link network, refer to documentation for the CC-Link Master Unit.
L RUN
❍
Green
5
❍
Green
❍
Green
❍
Green
❍
Green
●
●
●
●
●
●
Indicators:
MS
NS
✳
---
Red
Indicators:
5 - 5
Indicator
L ERR
SD
RD
●
✳
Yellow
Yellow
✳ Red
✳
(inconsistent
Yellow
Yellow
intervals)
✳ Red
✳
(consistent
Yellow
Yellow
intervals)
✳ Red
●
(inconsistent
Yellow
intervals)
●
●
Yellow
✳ Red
✳
(inconsistent
Yellow
Yellow
intervals)
✳ Red
●
(inconsistent
Yellow
intervals)
●
✳
Yellow
Yellow
●
●
Yellow
●
●
❍ Red
●
❍
✳
●
: Lit,
: Flashing,
: Not lit,
Seven-
segment
Item
cause of error
display
H2
Version
The protocol
compatibility
versions are
error
different.
❍
✳
●
: Lit,
: Flashing,
: Not lit,
❍
Normal transmission
❍
Normal data communications is being performed, but noise is
occasionally causing CRC errors.
❍
The station number setting of the Gateway Unit was changed
while the power was ON.
❍
Reception data is causing CRC errors and a response is not
possible.
❍
Data cannot be received by the local station.
❍
A polling response was performed, but CRC errors occurred
during refresh reception, so a send response is not possible.
❍
CRC errors occurred for data that was sent to the local station.
❍
CC-Link data links are not started.
❍
There is no data for the local station, or noise prevented the local
station from receiving the data.
●
Communications for CC-Link data links have been interrupted.
---
The station number setting or baud rate setting is not correct.
: Not applicable
---
Probable
Unit operation after error
Links are not started when the
power supply is turned ON.
If this error occurs when links are
active, the links remain active and
only the error display is performed.
When the correct frame is
received, the error display is
cleared and the links are started.
: Not applicable
---
CompoNet Gateway Unit for CC-Link Operation Manual
Operating status
Countermeasures
detection
---
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Troubleshooting
