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Check cable/connector
As errors on the junction from the main cable to the drop cable or the contact failure on the
connecting point of each station or errors of the master module are assumed, check with the
following procedure.
Error only 1 station
Monitor “individual communication flag”
in support tool.
Set the error operation mode of a
JW-20CM master module to “2.”
NO
NO
YES
YES
Exchange JW-20CM
At plural station error
Check and exchange the “bus
cable” and “branch cable” to
the station with the error or the
“station error module where
the error occurred.”
FT lamp turns ON
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