Mitsubishi Electric MELSEC iQ-R Series User Manual page 76

Considerations
■Considerations for Ethernet device connection
• When this product has been replaced and also IP address has been changed, then reset the Ethernet device too. If the
Ethernet device holds the Ethernet address (MAC address) of the communication target, continuous communication may
not be performed since the module replacement will change the Ethernet address (MAC address).
• Perform the troubleshooting in accordance with the manual for the Ethernet device when an error occurred on the Ethernet
device.
• Attach the provided connector cover to protect an unused Ethernet connector from dirt and dust.
• Place an Ethernet cable in a duct or clamp it. Otherwise, the dangling cable may swing or inadvertently be pulled. It may
cause a module or the cable to damage or malfunction due to poor contact.
• Protect the core wire in the connector of an Ethernet cable or a module to prevent touching by hand and sticking dirt or
dust. If any oil from your hand, dirt or dust sticks the core wire, it may increase the transmission loss and fail
communication.
• Check if an Ethernet cable used is disconnected, a short-circuit is generated, and the connector is properly connected.
• Do not use an Ethernet cable with a broken clip. Doing so may cause the unplugged cable or malfunction.
• Hold the connector of an Ethernet cable when connecting or disconnecting it. If the cable is pulled while being connected to
a module, it may cause the module or Ethernet cable to damage or malfunction due to poor contact.
• The maximum segment length of an Ethernet cable is 100 m. However, the length may be shorter depending on the use
environment of the cable. For details, contact the manufacturer of the cable used.
• The bend radius of an Ethernet cable is limited. For details, check the specifications of the Ethernet cable used.
• For the cascade connection of a repeater hub, check the specifications of this product before use. (Page 24
SPECIFICATIONS)
For the number of connectable levels for a switching hub, consult the manufacturer of the hub used.
■Considerations for 1000BASE-T/100BASE-TX connection
In a high-speed data communication (1 Gbps/100 Mbps) via 1000BASE-T/100BASE-TX connection, a communication error
may occur due to the effect of high frequency noise generated from the equipment other than this product, depending on the
installation environment.
Take the following countermeasures on this product to eliminate the effect of high frequency noise when constructing a
network system.
• Do not bundle a cable with the main circuit or power cable, or do not place it near those lines.
• Place cables in a duct.
• In the environment where a cable is susceptible to noise, use the shielded STP cable.
• In an environment where the system is susceptible to noise, include a retry processing in a user program.
• Change the settings of a device that is connected to this product to decrease the communication speed.
7 WIRING
74
7.2 Ethernet Connector