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IMCB03-E4
6. TROUBLESHOOTING
This section lists some of the main causes and solutions for communication problems.
If you can not solve a problem, please contact RKC sales office or the agent, on confirming the type
name and specifications of the product.
Problem Probable cause Solution
Trouble with and imperfect contact of
communication cable
Check communication cables and
connectors.
No
response
Incorrect communication speed Set the communication speed suitable for
the host computer by referring to "3.4
Communication speed setting" (P. 9).
Device address designation differs Make reassignment after checking the
device address by referring to "3.3
Device address setting" (P. 7).
Incorrect data bit configuration Make reassignment after checking the
data bit configuration by referring to
"3.5 Data bit configuration setting" (P.
11).
Transmission line is not set to the
receive state after data send
Check a program on the host computer
side.
EOT return
Incorrect identifier Make re-setting after checking the
identifier by referring to
The identifier of a function not added to
the controller is specified
"Communication identifier list"
(P. 28).
BCC error Check BCC of the transmission data.
NAK return Data exceeds the setting range Check a data range.
The identifier of a function not added to
the controller is specified
Make re-setting after checking the
identifier by referring to
"Communication identifier list"
(P. 28).
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