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MELSEC-F
SETTINGS AND PROCEDURES PRIOR TO OPERATION4
4 - 7
4.4 Connecting to the Network
The following explains how to connect the Ethernet module to the 100BASE-TX/
10BASE-T networks.
Some precautions that should be observed while connecting the Ethernet module are
also shown below. Pay close attention to safety and use the Ethernet module
properly.
(1) Sufficient network knowledge and safety precautions are required when installing
100BASE-TX or 10BASE-T networks. Consult a specialist when connecting
cable terminals or installing trunk line cables, etc.
(2) Use a connection cable conforming to the standards shown in Section 2.2.
CAUTION
Do not bundle the control wires and the communication cables with the main
circuit and the power wires, and do not install them close to each other. They
should be installed at least 100 mm (3.94 in.) away from each other. Failure to do
so may generate noise that may cause malfunctions.
Make sure to place the communication and power cables to be connected to the
module in a duct or fasten them using a clamp.
If the cables are not placed in a duct or fastened with a clamp, their positions may
be unstable or moved, and they may be pulled inadvertently. This may damage
the module and the cables or cause the module to malfunction because of faulty
cable connections.
When disconnecting the communication and power cables from the module,
do not pull the cables by hand.
When disconnecting a cable with a connector, hold the connector to the
module by hand and pull it out to remove the cable.
When disconnecting a cable without a connector, loosen the screws on the
terminal block first before removing the cable.
If a cable is pulled while connected to the module, it may cause the module to
malfunction or damage the module and the cable.
POINT
Cautions regarding powering the hub, PLC and Ethernet module simultaneously.
On some hubs, for a fixed period of time immediately after powering up, even if
packets are sent from the Ethernet device, there are cases when packets are not
sent to the external device. For this case, create a sequence program that waits a
sufficient amount of time after powering up before sending packets.