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499TWD01100 Twidoport Communication Problem Caution

Published date: 19 November 2020

Issue
The purpose of this resolution is to inform users of Twidoport Ethernet Bridges of a potential problem where the device may exhibit communication problems while on an operating network.

The Twidoport Ethernet Bridge may experience issues when exposed to broadcast traffic on the network. The symptoms of the fault are losing the IP address or the module going into Kernel mode.


Product Line
499TWD01100


Resolution

  • Devices purchased after July 30, 2007 will have firmware version 3.02 which has fixed the above issue.

    Schneider Electric recommends using managed switches with broadcast limiting capabilities to help filter broadcast traffic, minimizing the effect of excessive ARP and other broadcast traffic.
     

 

  • For firmware versions less than 3.02, to recover from losing an IP address, it is necessary to power cycle the Twidoport by disconnecting and reconnecting the communication cable from the Twidoport to the Twido PLC.

    A Twidoport that is in Kernel mode will have its STATUS LED blinking 7 times. To recover from this mode, connect to the device using TELNET. Once connected, type EXEC, then hit <enter>. This will take the module out of kernel mode.

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