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POINT
During the high-speed communication (100 M bps) via 100BASE-TX
connection, a communication error may occur due to the effect of high
frequency noise from devices other than programmable controller in a given
installation environment.
The following describes countermeasures on the QJ71E71-100 side to prevent
the effect of high frequency noise for construction of network system.
(1) Wiring connection
• Do not bundle the twisted pair cables with the main circuit and the power
wires, and do not install them close to each other.
• Make sure to place the twisted pair cables in a duct.
(2) Communication method
• Data communication with an external device is performed using TCP/IP
communication.
• Increase the number of communication retries as necessary.
(3) 10 M bps communication
• Communication is performed at a data transmission rate of 10 M bps by
changing the connection hub for the QJ71E71-100 to a hub capable of
handling 10 M bps.
5
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